This paper presents the life estimation of the diffuser structure. Literature shows that the welds are the source of failure in case of welded structure; hence the estimation of its life is very critical. There are two kinds of methods for life estimation stress life approach and strain life approach which have been validated for simple problems. Stress life approach was identified as appropriate for life estimation of the variable diffuser. There are papers indicating the methodology for life estimation using commercial software for life prediction. Here, Optistruct- Hyper-Works for pre-processing and solver and Hyper-View- Hyper-Works for post processing has been used for the indeterminate structure, complex loading and boundary condition. The mathematical model subjected to the variable pressure contours for a particular Mach No., with the gimbal joint boundary condition at the test section end and the roller support at the other end. In this paper stress and fatigue analysis of the variable diffuser has been carried out and life of the variable diffuser has been estimated.
Formulation of data based ann model for human powered oil pressIAEME Publication
This document describes the formulation of an artificial neural network (ANN) model for a human-powered oil press. The researchers conducted experiments to collect data on the oil press's input and output parameters. They developed mathematical models to relate the parameters but also created an ANN model to better handle the complex, nonlinear relationships. The ANN was trained on the experimental data and can now predict the output values corresponding to given input values, providing a "best fit" model for the oil press system. The ANN model allows entrepreneurs to select optimal input combinations to maximize oil extraction and minimize torque/velocity, improving productivity.
Failure analysis and redesign of shaft of overhead craneLaukik Raut
The document describes the failure analysis and redesign of the shaft in the gearbox of an overhead crane with a 25-tonne capacity. The original shaft failed due to high shear stresses. An analysis found the shear stress exceeded allowable values. The shaft was then redesigned with a larger diameter and different materials. Finite element analysis showed SAE 6150 steel would experience the lowest shear stresses, below allowable limits, making it the best material to prevent future failures.
This document compares the stress results from ANSYS finite element analysis to the Winkler-Bach theory for a crane hook with a trapezoidal cross-section. A 3D model of the hook was created in CATIA and imported into ANSYS for static structural analysis with a 12500 kg load. The von Mises stresses from ANSYS were around 10% higher than those calculated using the Winkler-Bach curved beam theory. The results were also similar to stresses specified in the DIN standard, validating the ANSYS finite element approach for stress analysis of curved beams like crane hooks.
Structural analysis of steering yoke of an automobile for withstanding torsio...eSAT Journals
Abstract
The steering columns in a steering system are one of the main devices of an automobile. It is a very important part to attain stability and
steady movement of the vehicle. It consists of two yokes, one on each shaft, connected by a cross-shaped intermediate member i.e.
spider. Motion transmission system of vehicles consist several components which sometimes encounter unfortunate failures. Some
common reasons for the failures may be manufacturing and design faults, maintenance faults, raw material faults, material processing
faults as well as the user originated faults. In this paper finite element analysis of the component is carried out to find the stress and
displacement of the final product. For modeling of the component, CATIA V5 R17 software is used. Preprocessing work like meshing
and analysis work is carried out in HYPERWORKS software. Using FEA analysis, we can identify the nature and characteristics of
stresses acting on the yoke and also evaluate the influence of the loads/ mass/ geometry/ boundary conditions over the yoke.
Keywords: Steering Yoke, Structural analysis, FEA, CATIA V5, Hyper works
The document discusses the structural analysis and optimization of a steering yoke component in an automobile. Finite element analysis was conducted on the original design using Hyperworks software to determine stresses and displacement under an applied torque load. The analysis found high stresses in some areas. Topology optimization was then used to modify the design by removing unnecessary material. Analysis of the modified design showed lower stresses within the yield strength of the material, indicating an improved and safe design.
Experimental study of Effect of Cutting Parameters on Cutting Force in Turnin...AM Publications
This document summarizes an experimental study on the effect of cutting parameters on cutting force during the turning process. Experiments were conducted on a lathe to study the influence of cutting speed, feed rate, and depth of cut on cutting force and surface roughness. Analysis of variance (ANOVA) found that depth of cut and the interaction between feed and depth of cut significantly affected cutting force. Feed rate, and the interaction between speed and feed most influenced surface roughness. Regression models were developed for cutting force and surface roughness based on the experimental results.
Taguchi method and anova an approach for process parameters 2IAEME Publication
This document presents a study that uses the Taguchi method and ANOVA to optimize the surface roughness of EN 353 steel during wet turning operations. The study examines five process parameters (depth of cut, feed rate, spindle speed, rake angle, and pressurized coolant jet) at two levels each in a 16-run orthogonal array experiment. ANOVA results show that rake angle significantly affects surface roughness. The optimal parameter settings to minimize surface roughness are identified as: depth of cut of 1.0 mm, feed rate of 0.8 mm/rev, spindle speed of 780 rpm, rake angle of 70 degrees, and pressurized coolant jet of 1.0 bar. Confirmation tests validate that these settings
A computational approach for evaluating helical compression springseSAT Journals
Abstract Helical compression springs are generally synthesized and evaluated by determining the maximum torsional stress, fatigue life, natural frequency, and/or load loss due to stress relaxation. To this end, researchers have developed finite element analysis (FEA) modeling methods to simulate the design performance of helical compression springs. The intent of this paper was to make a useful contribution to the published works for evaluating round wire helical compression springs. Specifically, commercially available FEA software was used to construct a structural model of a helical compression spring to simulate its full range of compression. The proposed FEA modeling methodology considers coil-to-coil contact and the end coils were modeled as rigid surfaces. With 9 mm of compression, the predicted spring rate correlated with the analytically calculated value to within 5%. Keywords: Helical compression spring, machine component design, spring FEA
Formulation of data based ann model for human powered oil pressIAEME Publication
This document describes the formulation of an artificial neural network (ANN) model for a human-powered oil press. The researchers conducted experiments to collect data on the oil press's input and output parameters. They developed mathematical models to relate the parameters but also created an ANN model to better handle the complex, nonlinear relationships. The ANN was trained on the experimental data and can now predict the output values corresponding to given input values, providing a "best fit" model for the oil press system. The ANN model allows entrepreneurs to select optimal input combinations to maximize oil extraction and minimize torque/velocity, improving productivity.
Failure analysis and redesign of shaft of overhead craneLaukik Raut
The document describes the failure analysis and redesign of the shaft in the gearbox of an overhead crane with a 25-tonne capacity. The original shaft failed due to high shear stresses. An analysis found the shear stress exceeded allowable values. The shaft was then redesigned with a larger diameter and different materials. Finite element analysis showed SAE 6150 steel would experience the lowest shear stresses, below allowable limits, making it the best material to prevent future failures.
This document compares the stress results from ANSYS finite element analysis to the Winkler-Bach theory for a crane hook with a trapezoidal cross-section. A 3D model of the hook was created in CATIA and imported into ANSYS for static structural analysis with a 12500 kg load. The von Mises stresses from ANSYS were around 10% higher than those calculated using the Winkler-Bach curved beam theory. The results were also similar to stresses specified in the DIN standard, validating the ANSYS finite element approach for stress analysis of curved beams like crane hooks.
Structural analysis of steering yoke of an automobile for withstanding torsio...eSAT Journals
Abstract
The steering columns in a steering system are one of the main devices of an automobile. It is a very important part to attain stability and
steady movement of the vehicle. It consists of two yokes, one on each shaft, connected by a cross-shaped intermediate member i.e.
spider. Motion transmission system of vehicles consist several components which sometimes encounter unfortunate failures. Some
common reasons for the failures may be manufacturing and design faults, maintenance faults, raw material faults, material processing
faults as well as the user originated faults. In this paper finite element analysis of the component is carried out to find the stress and
displacement of the final product. For modeling of the component, CATIA V5 R17 software is used. Preprocessing work like meshing
and analysis work is carried out in HYPERWORKS software. Using FEA analysis, we can identify the nature and characteristics of
stresses acting on the yoke and also evaluate the influence of the loads/ mass/ geometry/ boundary conditions over the yoke.
Keywords: Steering Yoke, Structural analysis, FEA, CATIA V5, Hyper works
The document discusses the structural analysis and optimization of a steering yoke component in an automobile. Finite element analysis was conducted on the original design using Hyperworks software to determine stresses and displacement under an applied torque load. The analysis found high stresses in some areas. Topology optimization was then used to modify the design by removing unnecessary material. Analysis of the modified design showed lower stresses within the yield strength of the material, indicating an improved and safe design.
Experimental study of Effect of Cutting Parameters on Cutting Force in Turnin...AM Publications
This document summarizes an experimental study on the effect of cutting parameters on cutting force during the turning process. Experiments were conducted on a lathe to study the influence of cutting speed, feed rate, and depth of cut on cutting force and surface roughness. Analysis of variance (ANOVA) found that depth of cut and the interaction between feed and depth of cut significantly affected cutting force. Feed rate, and the interaction between speed and feed most influenced surface roughness. Regression models were developed for cutting force and surface roughness based on the experimental results.
Taguchi method and anova an approach for process parameters 2IAEME Publication
This document presents a study that uses the Taguchi method and ANOVA to optimize the surface roughness of EN 353 steel during wet turning operations. The study examines five process parameters (depth of cut, feed rate, spindle speed, rake angle, and pressurized coolant jet) at two levels each in a 16-run orthogonal array experiment. ANOVA results show that rake angle significantly affects surface roughness. The optimal parameter settings to minimize surface roughness are identified as: depth of cut of 1.0 mm, feed rate of 0.8 mm/rev, spindle speed of 780 rpm, rake angle of 70 degrees, and pressurized coolant jet of 1.0 bar. Confirmation tests validate that these settings
A computational approach for evaluating helical compression springseSAT Journals
Abstract Helical compression springs are generally synthesized and evaluated by determining the maximum torsional stress, fatigue life, natural frequency, and/or load loss due to stress relaxation. To this end, researchers have developed finite element analysis (FEA) modeling methods to simulate the design performance of helical compression springs. The intent of this paper was to make a useful contribution to the published works for evaluating round wire helical compression springs. Specifically, commercially available FEA software was used to construct a structural model of a helical compression spring to simulate its full range of compression. The proposed FEA modeling methodology considers coil-to-coil contact and the end coils were modeled as rigid surfaces. With 9 mm of compression, the predicted spring rate correlated with the analytically calculated value to within 5%. Keywords: Helical compression spring, machine component design, spring FEA
Fea analysis and optimization of an one way clutch used in automatic transmis...eSAT Journals
Abstract An intent of this project is to reduce the weight of one way clutch which is being used in automotive transmission enabled sports cars. By reducing the weight we can achieve better efficiency in terms of strength and also to increase the transmission power from torque converter wherein which engaging and disengaging happens. One way roller clutch is one, when the unit rotates in one direction the rollers slip or free-wheel, but when a torque is applied in the opposite direction, the rollers lock between outer cage (cam) and inner cage, producing a wedging action and binding because of friction. The rollers are spring-loaded. Design parameters like maximum torsional deflection, minimum hoop`s stress are considered for to get increased efficiency. In order to achieve this FEA analysis and optimization technique is carried here. Optimization is the mathematical discipline which is concerned with finding the maxima and minima of functions, possibly subject to constraints. Here optimization is carried out by using the global parameters optimization technique. Keywords: FEA analysis, Global parameters, Minimum hoop`s stress, Weight
Cyclic Life Establishment of First Stage Compressor Blade - Aircraft Jet EngineIJERA Editor
In this project an attempt is made to identify the cyclic life, modal efficacies for assessing the life that is declared
by the Original Engine Manufacturer. Using the Goodman diagram and knowing the mean stress of the blade for
all rpm conditions.
Experimental and numerical study of defects in pressuresed cylindrical shells...eSAT Journals
Abstract
In order to conduct a comprehensive study on the harmfulness of defects in the pressure vessels, and in order to propose simple rules to characterize the harmfulness of existing defects in pressurized installations. An experimental study based on the monitoring of deformations by strain gauges in the vicinity of defects. In parallel, during pressure testing, the evolution of defects is detected and followed by the acoustic emission method. The specific instrumentation has been designed and implemented. Mini-structures ( models) have therefore been carried out with positional defects and different orientation. These experimental results validated by a numerical model of finite elements.
Keywords: Pressure vessels, Cylindrical shells, Defect harmfulness, Circumferential and longitudinal Crack, Strain gauges, Acoustic emission, Stress Intensity Factor.
Modeling and Analysis of Two Wheeler Connecting Rod by Using AnsysIOSR Journals
Connecting rod is a major link inside of a internal combustion engine. It is the intermediate member
between the piston and the crankshaft. Its primary function is to transmit the push and pull from the piston pin
to the crank pin thus converting the reciprocating motion of piston in to rotary motion of the crank. In this paper
a static analysis is conducted on a connecting rod of a single cylinder 4-stroke petrol engine. The model is
developed using Solid modeling software i.e. PRO/E (creo-parametric). Further finite element analysis is done
to determine the von-misses stresses shear stress and strains for the given loading conditions.
New simple equations for designing of finite full journal bearingIAEME Publication
New equations and software is developed to simplify the calculation of designing of finite length full journal bearing based on design methodology given by Reason and Narang. The equations given here calculate the values of eccentricity, Is and Ic.
Design, Analysis and weight optimization of Crane Hook: A Reviewijsrd.com
Crane hook are highly liable component and are always subjected to failure due to accumulation of large amount of stress which can eventually lead to its failure .In this present work, to study the different design parameter & stress pattern of crane hook in its loaded condition for different cross section, the design and drafting of crane hook will be prepared by using ANSYS 14.5. By finite element analysis, the stress which is to be formed in various cross section are compared with design calculation .The stress concentration factors are used in strength and durability evaluation of structure and machine element. In this work and also we observe the parameter that affects the weight reduction.
COMPARATIVE ANALYSIS AND DESIGN OF CONNECTING ROD AM Publications
The connecting rod is the intermediate member between the piston and the Crankshaft. Its primary function is to transmit the push and pull from the piston pin to the crank pin, thus converting the reciprocating motion of the piston into rotary motion of the crank. This thesis describes designing and Analysis of connecting rod. Currently existing connecting rod is manufactured by using material. In this drawing is drafted from the calculations. A parametric model of Connecting rod is modeled using NX 10.0 software and to that model, analysis is carried out by using ANSYS 16.0 Software. Finite element analysis of connecting rod is done by considering the materials Aluminum 360, Forged Steel, Titanium Alloy, Mild Steel, and Magnesium Alloy. The best combination of parameters like Von misses Stress and strain, Deformation, Factor of safety and weight reduction for four wheelers Connecting Rod were done in ANSYS software.
EFFECTS OF TRANSIENT LOAD ONGASTURBINE BLADE STRESS AND FATIGUE LIFE CHARACTE...Barhm Mohamad
This document summarizes a study that used finite element analysis to analyze the stress and fatigue life characteristics of gas turbine blades. The study simulated the thermal and mechanical loads on the blades to determine stress distributions and fatigue zones. It found that the maximum von Mises stress was 126 MPa near the blade shroud. Transient stress analysis showed highest stresses at the blade base. Fatigue analysis found the first fatigue zone appears in the middle of the blade exhaust side. The results provide useful insights for blade design and failure analysis.
Drop test simulation on pen drive by using ansyseSAT Journals
1) Researchers conducted a drop test simulation of a pen drive using ANSYS to evaluate its structural safety when dropped.
2) They modeled the pen drive and a platform in ANSYS, applied material properties of carbon steel and plastic, and simulated an initial drop velocity of 100 m/s.
3) The results found that using carbon steel resulted in higher stresses, strains and deformations than using plastic, indicating that plastic provides better structural safety for the pen drive in a drop scenario.
Application of finite element analysis in effective design of flight control ...eSAT Journals
Abstract The objective of this project work is to effectively design and analyze the helicopter flight control circuits. The design process involves FE method to assess the directional control circuit. Displacement, stress, strain energy values are obtained for the circuit for different load cases and optimum design is obtained for safe helicopter flight controls for critical maneuvers. In a helicopter the rotor blade is operated using mechanical flight control system consisting of elements like push-pull rod, links, bell crank levers, structural supporting brackets etc. There is a certain amount of reduction in stiffness and strength of elements of the circuit due to stretch in these elements resulting in false control surface deflections. This project work focuses on the application of FEM in design, analysis and optimization of directional flight control circuit using ALTAIR HYPERMESH and MSC NASTRAN software’s. FEM techniques have been extensively used in this study to simulate the control circuit mechanism. Keywords: directional control circuit, finite element analysis, displacement, strain energy
This document summarizes a study that analyzed the stresses in a flywheel design using finite element analysis. It describes modeling a Maruti 800 flywheel in CATIA and analyzing it in ANSYS. Two materials were considered - gray cast iron and S-glass epoxy. The flywheel was meshed and appropriate boundary conditions were applied. The results found the maximum normal stress to be 44.07 MPa for gray cast iron and 11.54 MPa for S-glass epoxy. The study demonstrated using FEA to optimize flywheel design and select suitable materials.
IRJET- Design, Testing and Analysis of Spherical and Aerodynamic Helmet in Op...IRJET Journal
This document discusses a study that designed, tested, and analyzed two types of motorcycle helmets - a spherical helmet and an aerodynamic helmet - in an open circuit low-speed wind tunnel. The helmets were tested at wind speeds of 5m/s, 7.5m/s, and 10m/s and at pitch angles of 0°, 15°, and 30° to measure and compare the pressure on different points of each helmet. The aerodynamic helmet generally performed better with smoother pressure curves and less variation in pressure measurements across points compared to the spherical helmet. The study provides data on the pressure measurements for each helmet across the various test conditions.
Design evaluation and optimization of steering yoke of an automobileeSAT Publishing House
This document describes research conducted to optimize the design of an automobile steering yoke through finite element analysis and experimental testing. The researchers created 3D models of the steering yoke in CATIA software and applied topology, shape, and size optimization techniques. They then conducted finite element analysis in HyperWorks to analyze von Mises stresses, displacement, and mass. Experimental testing was also performed on the steering yoke using a universal testing machine and strain gauges. The optimized design was found to have lower stresses, displacement, and mass than the original design, validating the finite element analysis model.
Design evaluation and optimization of steering yoke of an automobileeSAT Journals
Abstract The purpose of a steering system is to control the direction of the vehicle by operating the steering wheel of the steering system. The steering columns in a steering system are one of the main devices of an automobile. It is a very important part to attain stability and steady movement of the vehicle. The steering yoke consists of two forged-steel yokes or forks joined to the two shafts being coupled and situated at right angles to each other. A spider hinges these two yokes together. Since the arms of the spider are at right angles the spider arm rocks backwards and forward between four extreme positions. Motion transmission system of vehicles consist several components which sometimes encounter unfortunate failures. Some common reasons for the failures may be manufacturing, design faults, maintenance faults, raw material faults, material processing faults as well as the user originated faults. In this paper structural optimization of the steering yoke is carried out. For modeling of the component, CATIA V5 R17 software is used. It has been found that there are essentially in two stages of the design process that structural optimization can be applied. In the early stage of concept generation, topology optimization should be used to develop an efficient structure from the beginning. At this level an automatized variation of optimization parameters was proven useful to and the best feasible design possible. In the later stage, shape and size optimization should be used to fine-tune the structure realized from the topology optimization and carried out physical experimentation to validate the model. Keywords: Steering Yoke, Structural optimization, CATIA V5, Hyperworks
The document analyzes problems with the shaft of a biomass grinder integrated with a briquetting plant. Finite element analysis was conducted using ANSYS software to model and simulate stresses on the stepped shaft under different loads and rotational speeds. The analysis found that maximum shear stress occurred at the point where the blower was fitted to the shaft. Increasing pressure led to higher von Mises and shear stresses. However, operating the shaft at higher rotational speeds reduced von Mises stresses, lowering the risk of failure. The study provides insights to reduce shaft stresses and improve reliability of the biomass grinder.
Study of analysis of bus passenger tie rod a revieweSAT Journals
Abstract This paper focuses on the study of buckling load on the Tie rod of steering system that undergoes an axial compression. Because of the external factors like road condition, different driving situations, different road adhesion, traffic conditions, vibrations and sudden jerks are sets up in tie rod. Tie rod generally buckle under the action of compressive force due to the large ratio of tie rod length to its radius of gyration. When it becomes worn out, steering will become more difficult and the vehicle will also typically be pulling or dragging to either side. Thus the aim of the project is to analyze tie rod for to improve the mass and buckling load of tie rod and to find out maximum deformation and stress. Present research is divided in two parts. First, to conduct survey amongst the buses, examine the causes of failure and second is to design and analysis to recommend best possible alternatives of Tie Rod with the aid of advanced design tools like CAD. Tie Rod failure is one of the major problems facing for MSRTC workshop supervisor. Key Words: Buckling Load, Compressive Load, CAD, FEM, MSRTC Bus, Tie Rod etc…
Bending test | MECHANICS OF MATERIALS Laboratory | U.O.B |Saif al-din ali
The document describes a bending test experiment conducted on a steel beam specimen. The objectives were to determine deflections and bending stresses under different loading conditions. The experiment involved applying concentrated loads at the center of beams with simply supported, cantilever, and fixed end conditions. Deflections and stresses were calculated theoretically and measured experimentally for each loading case. Results were compared to evaluate accuracy. The goal was to analyze beam behavior under bending forces.
Design Optimization and Analysis of a Steam Turbine Rotor GroovesIOSR Journals
1. The document describes a finite element analysis performed to optimize the design of steam turbine rotor grooves.
2. The analysis evaluated different fillet radii ranging from 13 to 50 mm to determine the maximum principal stress and stress concentration factor.
3. The optimal design was found to have a fillet radius of 40 mm, which reduced the stress concentration factor to 1.152 and deformation to 0.066121 mm.
Finite Element Analysis and Fatigue analysis of Crane Hook with Different Ma...IRJET Journal
1. A finite element analysis was conducted on a crane hook to determine the stresses induced under loading and evaluate three potential materials: structural steel, aluminum alloy, and wrought iron.
2. The analysis found that structural steel and wrought iron experienced the lowest stresses and deformations compared to aluminum alloy.
3. A fatigue analysis was then performed on the structural steel and wrought iron models to evaluate fatigue life and damage contours, with the goal of selecting the best material for the crane hook.
Design of the wing box structure for the given wing geometry, weights and load factors. Microsoft Excel was used for all the calculations needed for this design. The complete structure was drafted using Solidworks CAD software.
Computational Fluid Dynamics (CFD) - Approach to study Incompressible Boundar...AM Publications
In turbulence models we create mathematical models that describe the flow properties of a flowing fluid. A turbulence model is a computational procedure to close the system of mean flow equations and so that a more or less wide variety of flow problems can be calculated. However, far less precision has been achieved in creating a mathematical model that approximates the physical behavior of turbulent flows. Reynolds stress model is used to get the flow behavior and compared with the theoretical solution and the inferences are drawn.
Evaluation of Over-speed, Burst Margin and Estimation of Low-cycle Fatigue Li...AM Publications
Aero engine rotor burst evaluation is one of the most important problems to be taken care off, whenever it comes to designing a turbo machinery disc. The consequences of a fiasco can be intense, since the disc disintegrates into multiple pieces and they are hurled away in all the possible direction at high speeds. Due to high thermo-mechanical loading conditions the disc is subjected to varying degrees of temperature from bore to rim. However, the centrifugal force dominates in the disc which ranges from 85%-90% and the rest can be treated as thermal and gas loads. The challenge lies at designing a disc for off design conditions with their varying loads and duty cycles. In present work evaluation of safety margins and low-cycle fatigue (LCF) estimation of an aero engine disc through classical methods and blending the terminologies with simulation engineering to arrive at a probable interpretation of number of duty cycles is carried out. The methodology compares the fatigue parameters involved in evaluation of disc life. The design tool closely connects the flight certification requirement, namely Flight Readiness Certification, Federal Aviation Administration and European Aviation Safety Agency the regulating agencies for safety in air transportation vehicles. Speed regulations through API and MIL handbook for material specification using finite element analysis approach.
Fea analysis and optimization of an one way clutch used in automatic transmis...eSAT Journals
Abstract An intent of this project is to reduce the weight of one way clutch which is being used in automotive transmission enabled sports cars. By reducing the weight we can achieve better efficiency in terms of strength and also to increase the transmission power from torque converter wherein which engaging and disengaging happens. One way roller clutch is one, when the unit rotates in one direction the rollers slip or free-wheel, but when a torque is applied in the opposite direction, the rollers lock between outer cage (cam) and inner cage, producing a wedging action and binding because of friction. The rollers are spring-loaded. Design parameters like maximum torsional deflection, minimum hoop`s stress are considered for to get increased efficiency. In order to achieve this FEA analysis and optimization technique is carried here. Optimization is the mathematical discipline which is concerned with finding the maxima and minima of functions, possibly subject to constraints. Here optimization is carried out by using the global parameters optimization technique. Keywords: FEA analysis, Global parameters, Minimum hoop`s stress, Weight
Cyclic Life Establishment of First Stage Compressor Blade - Aircraft Jet EngineIJERA Editor
In this project an attempt is made to identify the cyclic life, modal efficacies for assessing the life that is declared
by the Original Engine Manufacturer. Using the Goodman diagram and knowing the mean stress of the blade for
all rpm conditions.
Experimental and numerical study of defects in pressuresed cylindrical shells...eSAT Journals
Abstract
In order to conduct a comprehensive study on the harmfulness of defects in the pressure vessels, and in order to propose simple rules to characterize the harmfulness of existing defects in pressurized installations. An experimental study based on the monitoring of deformations by strain gauges in the vicinity of defects. In parallel, during pressure testing, the evolution of defects is detected and followed by the acoustic emission method. The specific instrumentation has been designed and implemented. Mini-structures ( models) have therefore been carried out with positional defects and different orientation. These experimental results validated by a numerical model of finite elements.
Keywords: Pressure vessels, Cylindrical shells, Defect harmfulness, Circumferential and longitudinal Crack, Strain gauges, Acoustic emission, Stress Intensity Factor.
Modeling and Analysis of Two Wheeler Connecting Rod by Using AnsysIOSR Journals
Connecting rod is a major link inside of a internal combustion engine. It is the intermediate member
between the piston and the crankshaft. Its primary function is to transmit the push and pull from the piston pin
to the crank pin thus converting the reciprocating motion of piston in to rotary motion of the crank. In this paper
a static analysis is conducted on a connecting rod of a single cylinder 4-stroke petrol engine. The model is
developed using Solid modeling software i.e. PRO/E (creo-parametric). Further finite element analysis is done
to determine the von-misses stresses shear stress and strains for the given loading conditions.
New simple equations for designing of finite full journal bearingIAEME Publication
New equations and software is developed to simplify the calculation of designing of finite length full journal bearing based on design methodology given by Reason and Narang. The equations given here calculate the values of eccentricity, Is and Ic.
Design, Analysis and weight optimization of Crane Hook: A Reviewijsrd.com
Crane hook are highly liable component and are always subjected to failure due to accumulation of large amount of stress which can eventually lead to its failure .In this present work, to study the different design parameter & stress pattern of crane hook in its loaded condition for different cross section, the design and drafting of crane hook will be prepared by using ANSYS 14.5. By finite element analysis, the stress which is to be formed in various cross section are compared with design calculation .The stress concentration factors are used in strength and durability evaluation of structure and machine element. In this work and also we observe the parameter that affects the weight reduction.
COMPARATIVE ANALYSIS AND DESIGN OF CONNECTING ROD AM Publications
The connecting rod is the intermediate member between the piston and the Crankshaft. Its primary function is to transmit the push and pull from the piston pin to the crank pin, thus converting the reciprocating motion of the piston into rotary motion of the crank. This thesis describes designing and Analysis of connecting rod. Currently existing connecting rod is manufactured by using material. In this drawing is drafted from the calculations. A parametric model of Connecting rod is modeled using NX 10.0 software and to that model, analysis is carried out by using ANSYS 16.0 Software. Finite element analysis of connecting rod is done by considering the materials Aluminum 360, Forged Steel, Titanium Alloy, Mild Steel, and Magnesium Alloy. The best combination of parameters like Von misses Stress and strain, Deformation, Factor of safety and weight reduction for four wheelers Connecting Rod were done in ANSYS software.
EFFECTS OF TRANSIENT LOAD ONGASTURBINE BLADE STRESS AND FATIGUE LIFE CHARACTE...Barhm Mohamad
This document summarizes a study that used finite element analysis to analyze the stress and fatigue life characteristics of gas turbine blades. The study simulated the thermal and mechanical loads on the blades to determine stress distributions and fatigue zones. It found that the maximum von Mises stress was 126 MPa near the blade shroud. Transient stress analysis showed highest stresses at the blade base. Fatigue analysis found the first fatigue zone appears in the middle of the blade exhaust side. The results provide useful insights for blade design and failure analysis.
Drop test simulation on pen drive by using ansyseSAT Journals
1) Researchers conducted a drop test simulation of a pen drive using ANSYS to evaluate its structural safety when dropped.
2) They modeled the pen drive and a platform in ANSYS, applied material properties of carbon steel and plastic, and simulated an initial drop velocity of 100 m/s.
3) The results found that using carbon steel resulted in higher stresses, strains and deformations than using plastic, indicating that plastic provides better structural safety for the pen drive in a drop scenario.
Application of finite element analysis in effective design of flight control ...eSAT Journals
Abstract The objective of this project work is to effectively design and analyze the helicopter flight control circuits. The design process involves FE method to assess the directional control circuit. Displacement, stress, strain energy values are obtained for the circuit for different load cases and optimum design is obtained for safe helicopter flight controls for critical maneuvers. In a helicopter the rotor blade is operated using mechanical flight control system consisting of elements like push-pull rod, links, bell crank levers, structural supporting brackets etc. There is a certain amount of reduction in stiffness and strength of elements of the circuit due to stretch in these elements resulting in false control surface deflections. This project work focuses on the application of FEM in design, analysis and optimization of directional flight control circuit using ALTAIR HYPERMESH and MSC NASTRAN software’s. FEM techniques have been extensively used in this study to simulate the control circuit mechanism. Keywords: directional control circuit, finite element analysis, displacement, strain energy
This document summarizes a study that analyzed the stresses in a flywheel design using finite element analysis. It describes modeling a Maruti 800 flywheel in CATIA and analyzing it in ANSYS. Two materials were considered - gray cast iron and S-glass epoxy. The flywheel was meshed and appropriate boundary conditions were applied. The results found the maximum normal stress to be 44.07 MPa for gray cast iron and 11.54 MPa for S-glass epoxy. The study demonstrated using FEA to optimize flywheel design and select suitable materials.
IRJET- Design, Testing and Analysis of Spherical and Aerodynamic Helmet in Op...IRJET Journal
This document discusses a study that designed, tested, and analyzed two types of motorcycle helmets - a spherical helmet and an aerodynamic helmet - in an open circuit low-speed wind tunnel. The helmets were tested at wind speeds of 5m/s, 7.5m/s, and 10m/s and at pitch angles of 0°, 15°, and 30° to measure and compare the pressure on different points of each helmet. The aerodynamic helmet generally performed better with smoother pressure curves and less variation in pressure measurements across points compared to the spherical helmet. The study provides data on the pressure measurements for each helmet across the various test conditions.
Design evaluation and optimization of steering yoke of an automobileeSAT Publishing House
This document describes research conducted to optimize the design of an automobile steering yoke through finite element analysis and experimental testing. The researchers created 3D models of the steering yoke in CATIA software and applied topology, shape, and size optimization techniques. They then conducted finite element analysis in HyperWorks to analyze von Mises stresses, displacement, and mass. Experimental testing was also performed on the steering yoke using a universal testing machine and strain gauges. The optimized design was found to have lower stresses, displacement, and mass than the original design, validating the finite element analysis model.
Design evaluation and optimization of steering yoke of an automobileeSAT Journals
Abstract The purpose of a steering system is to control the direction of the vehicle by operating the steering wheel of the steering system. The steering columns in a steering system are one of the main devices of an automobile. It is a very important part to attain stability and steady movement of the vehicle. The steering yoke consists of two forged-steel yokes or forks joined to the two shafts being coupled and situated at right angles to each other. A spider hinges these two yokes together. Since the arms of the spider are at right angles the spider arm rocks backwards and forward between four extreme positions. Motion transmission system of vehicles consist several components which sometimes encounter unfortunate failures. Some common reasons for the failures may be manufacturing, design faults, maintenance faults, raw material faults, material processing faults as well as the user originated faults. In this paper structural optimization of the steering yoke is carried out. For modeling of the component, CATIA V5 R17 software is used. It has been found that there are essentially in two stages of the design process that structural optimization can be applied. In the early stage of concept generation, topology optimization should be used to develop an efficient structure from the beginning. At this level an automatized variation of optimization parameters was proven useful to and the best feasible design possible. In the later stage, shape and size optimization should be used to fine-tune the structure realized from the topology optimization and carried out physical experimentation to validate the model. Keywords: Steering Yoke, Structural optimization, CATIA V5, Hyperworks
The document analyzes problems with the shaft of a biomass grinder integrated with a briquetting plant. Finite element analysis was conducted using ANSYS software to model and simulate stresses on the stepped shaft under different loads and rotational speeds. The analysis found that maximum shear stress occurred at the point where the blower was fitted to the shaft. Increasing pressure led to higher von Mises and shear stresses. However, operating the shaft at higher rotational speeds reduced von Mises stresses, lowering the risk of failure. The study provides insights to reduce shaft stresses and improve reliability of the biomass grinder.
Study of analysis of bus passenger tie rod a revieweSAT Journals
Abstract This paper focuses on the study of buckling load on the Tie rod of steering system that undergoes an axial compression. Because of the external factors like road condition, different driving situations, different road adhesion, traffic conditions, vibrations and sudden jerks are sets up in tie rod. Tie rod generally buckle under the action of compressive force due to the large ratio of tie rod length to its radius of gyration. When it becomes worn out, steering will become more difficult and the vehicle will also typically be pulling or dragging to either side. Thus the aim of the project is to analyze tie rod for to improve the mass and buckling load of tie rod and to find out maximum deformation and stress. Present research is divided in two parts. First, to conduct survey amongst the buses, examine the causes of failure and second is to design and analysis to recommend best possible alternatives of Tie Rod with the aid of advanced design tools like CAD. Tie Rod failure is one of the major problems facing for MSRTC workshop supervisor. Key Words: Buckling Load, Compressive Load, CAD, FEM, MSRTC Bus, Tie Rod etc…
Bending test | MECHANICS OF MATERIALS Laboratory | U.O.B |Saif al-din ali
The document describes a bending test experiment conducted on a steel beam specimen. The objectives were to determine deflections and bending stresses under different loading conditions. The experiment involved applying concentrated loads at the center of beams with simply supported, cantilever, and fixed end conditions. Deflections and stresses were calculated theoretically and measured experimentally for each loading case. Results were compared to evaluate accuracy. The goal was to analyze beam behavior under bending forces.
Design Optimization and Analysis of a Steam Turbine Rotor GroovesIOSR Journals
1. The document describes a finite element analysis performed to optimize the design of steam turbine rotor grooves.
2. The analysis evaluated different fillet radii ranging from 13 to 50 mm to determine the maximum principal stress and stress concentration factor.
3. The optimal design was found to have a fillet radius of 40 mm, which reduced the stress concentration factor to 1.152 and deformation to 0.066121 mm.
Finite Element Analysis and Fatigue analysis of Crane Hook with Different Ma...IRJET Journal
1. A finite element analysis was conducted on a crane hook to determine the stresses induced under loading and evaluate three potential materials: structural steel, aluminum alloy, and wrought iron.
2. The analysis found that structural steel and wrought iron experienced the lowest stresses and deformations compared to aluminum alloy.
3. A fatigue analysis was then performed on the structural steel and wrought iron models to evaluate fatigue life and damage contours, with the goal of selecting the best material for the crane hook.
Design of the wing box structure for the given wing geometry, weights and load factors. Microsoft Excel was used for all the calculations needed for this design. The complete structure was drafted using Solidworks CAD software.
Computational Fluid Dynamics (CFD) - Approach to study Incompressible Boundar...AM Publications
In turbulence models we create mathematical models that describe the flow properties of a flowing fluid. A turbulence model is a computational procedure to close the system of mean flow equations and so that a more or less wide variety of flow problems can be calculated. However, far less precision has been achieved in creating a mathematical model that approximates the physical behavior of turbulent flows. Reynolds stress model is used to get the flow behavior and compared with the theoretical solution and the inferences are drawn.
Evaluation of Over-speed, Burst Margin and Estimation of Low-cycle Fatigue Li...AM Publications
Aero engine rotor burst evaluation is one of the most important problems to be taken care off, whenever it comes to designing a turbo machinery disc. The consequences of a fiasco can be intense, since the disc disintegrates into multiple pieces and they are hurled away in all the possible direction at high speeds. Due to high thermo-mechanical loading conditions the disc is subjected to varying degrees of temperature from bore to rim. However, the centrifugal force dominates in the disc which ranges from 85%-90% and the rest can be treated as thermal and gas loads. The challenge lies at designing a disc for off design conditions with their varying loads and duty cycles. In present work evaluation of safety margins and low-cycle fatigue (LCF) estimation of an aero engine disc through classical methods and blending the terminologies with simulation engineering to arrive at a probable interpretation of number of duty cycles is carried out. The methodology compares the fatigue parameters involved in evaluation of disc life. The design tool closely connects the flight certification requirement, namely Flight Readiness Certification, Federal Aviation Administration and European Aviation Safety Agency the regulating agencies for safety in air transportation vehicles. Speed regulations through API and MIL handbook for material specification using finite element analysis approach.
Numerical prediction of polyurethane foam filled steel hat Section tubes unde...AM Publications
This paper presents studies of the numerical prediction of the behaviour of polyurethane (PU) foam filled hat section tubes. Experimental results of the foam-filled single-hat and double-hat components tested in an impact testing machine are described. Consistent experimental load displacement curves were generated. FE analyses using LS-DYNA of the impact behaviours predicted are shown to agree favourably with experimental results.
Design and Analysis of a Heat Exchanger for an Open Circuit Wind Tunnel contr...AM Publications
This paper presents an account of model design, steady state simulation and a CFD analysis of three heat exchangers namely, double pipe heat exchanger, shell and tube heat exchanger and transverse fin type heat exchanger in order to evaluate their performance under a common parameter. The objective of this research work is to select the appropriate heat exchanger for exchange of excess heat from a liquid rheostat which controls the speed of an AC motor coupled to the fans of an open circuit wind tunnel. Five models in each of the three heat exchangers were designed and its pressure drop was calculated. This helped in determining the best model for further analysis. Each model from the three heat exchangers was analysed and parameters like temperature, pressure and velocity were compared.
Numerical simulation and optimization of high performance supersonic nozzle a...eSAT Journals
Abstract The Principle purpose of a nozzle is to accelerate the flow to higher exit velocities. The fluid acceleration is based on the design criteria and characteristics. To achieve good performance characteristics with minimum energy losses a nozzle must satisfy all the design requirements at all operating conditions. This is possible only when the nozzle theory is assumed to be isentropic irrespective of the changes in pressure, temperature and density which is generally caused due to formation of a Shock Wave. The thesis focuses on the design, development and optimization of a Supersonic Convergent-Divergent Nozzle where the analytical results are validated using theory calculations. The simulation work is carried out for CD Nozzles with different angles of divergence keeping the other inputs fixed. The objective of the proposed thesis is to show the best Expansion ratio, Nozzle Pressure ratio (NPR) and Nozzle Area Ratio(NAR) where the thrust obtained by the supersonic nozzle is maximum. The simulation is then repeated for expansion gas the results of which are later compared with standard air to show which possesses better performance characteristics. The Nozzle design chosen is based upon existing literature studies. Key Words: CD Nozzle, Expansion Ratio, Nozzle Pressure Ratio (NPR), Nozzle Area Ratio(NAR),Divergence Angle etc…
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Transient Analysis of Centrifugal Pump for Thermic Fluid ApplicationAM Publications
Flow analysis and heat transfer analysis in centrifugal pumps has long been an intensive subject of research.
Computational Fluid Dynamics (CFD) is the present day state-of-art technique for fluid flow analysis. Numerical simulation
of 18 m3/hr capacity centrifugal pump carried out using commercial CFD package FLUENT is presented. The steady state
simulations were carried out using Reynolds averaged Navier-Stokes (RANS) equations. It was found that non-uniformities
are created in different parts of the pump at off-design conditions which result in the decrease in efficiency.
Cfd analysis of rae 2822 supercritical airfoil at transonic mach speedseSAT Journals
This document describes a CFD analysis of a RAE 2822 supercritical airfoil with and without wedge profiles at transonic Mach speeds. The analysis seeks to improve airfoil stability when flow approaches transonic Mach numbers. Key findings include observation of shock wave formation when free stream reaches transonic Mach, and drastic changes in pressure, temperature, and density across shocks. Results show lift is reduced in the transonic regime from Mach 0.7 to 1.4. Lift is higher for airfoils with wedge profiles compared to without, and for higher angles of attack. The airfoil with wedge is more stable at 150 angle of attack, with lift drop at Mach 1.1 versus 0.8 without wedge.
ANALYSIS OF FIBER REINFORCED PLASTIC NEEDLE GATE FOR K.T. WEIRSAM Publications
Steel needle gates which are being used in Kolhapur Type Weirs (K.T. weirs) need to be replaced to overcome their disadvantages like heavy weight, corrosive nature, maintenance cost etc. Fiber Reinforced Plastic (F.R.P.) having advantages like light weight, low maintenance cost, corrosion resistance, longer service life etc. can be thought of as a replacement to steel in K.T. Weirs. In the present investigation an attempt is made to analyze the FRP Needle gates using finite element method. A generalized software tool is developed using FORTRAN which gives structural responses (deflections, stresses) as a result by input of material properties.
Effect of spikes integrated to airfoil at supersonic speedeSAT Journals
Abstract
The objective of this is to analyse the flow field over an aerofoil section integrated with spikes at supersonic speed (Mach number
greater than 1). Use of spike integrated with aerofoil changes the flow characteristics over aerofoil and hence aerodynamic lift
and drag. The experiment consists of flow visualization graphs and measurement of coefficient of aerodynamic drag and lift.
Here we are using different shapes of spike like sharp edge and hemi spherical edge. In this we will compare the flow over
aerofoil with spike and without spike. The flow analysis is done by using Computational fluid dynamics (CFD). CFD is the study
of external flow over a body or internal flow through the body. CFD is aiding aero-dynamist to better understand the flow physics
and in turn to design efficient models. In short, CFD is playing a strong role as a design tool as well as a research tool.
Keywords: NACA 651-412 airfoil, spike, Ansys Fluent, Ansys ICEM CFD, Pressure Coefficient
This document discusses computational fluid dynamics (CFD) analysis of flow over an airfoil integrated with spikes at supersonic speeds. It presents the results of CFD simulations using ANSYS Fluent software to analyze the effect of adding either a sharp spike or hemispherical spike to a NACA 651-412 airfoil at Mach numbers over 1. The study found that the addition of spikes modifies the flow field over the airfoil and changes the aerodynamic lift and drag coefficients. Spikes help reduce problems like higher heating and separation that occur during supersonic flight.
Finite element modeling for maximum temperature in friction stir welding of a...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Modelling and analysis of single circular grooves made on dry friction clutcheseSAT Journals
This document analyzes the modeling and simulation of single circular grooves made on dry friction clutches. It describes the modeling of a clutch plate with a single circular groove in CATIA V5 and analyzing it in ANSYS. The analysis shows the single circular groove clutch plate has a maximum deformation of 1.9013e-5 m, Von-Mises stress of 1.3378e7 Pa, heat flux of 14503 W/m2, and can transmit a torque of 62.131 Nm, which is 10.43% more than other groove patterns. The document concludes the single circular groove pattern provides better torque transmission capacity compared to other patterns.
Modelling and analysis of single circular grooves made on dry friction clutcheseSAT Journals
Abstract
We all know that clutch is a machine member and is generally used for to engage and disengage the transmission and change the gear it connect the two shafts that is driving shaft to the driven shaft that’s why if there is starting or stop the driven shaft there will be with or without the stopping of the driving shaft. So in this paper we are going to modelling and analyzed the single circular grooves which are made on the friction disc. And also will take the result of the torque transmission capacity which will be produce at the single circular grooves disc. Here we are going to analyze over ansys and will take the model in catiav5.
Keywords: Clutch, Single Circular Grooves, Torque, Lining Material Etc.
Design and Analysis Nose Landing Gear SupportIJSRD
Nose landing gear support bracket is one of the main parts in the nose landing gear assembly, whose function is to maintain the stability of the landing gear during the movements. This work is focused on the FEA analysis of support bracket by varying the stress concentration area, The objective of this work is to determine the static and modal analysis of support bracket with different stress concentration areas, then analysis is done using ANSYS WORKBENCH, These results could provide some useful suggestions for design and improvement for the better component
Dynamics Behaviour of Multi Storeys Framed Structures by of Iterative Method AM Publications
Dynamics refers to the branch of mechanics that deals with the movement of objects and the forces that drive that movement. Structural analysis which covers the behaviour of structures subjected to dynamic (actions having high acceleration) loading. Dynamic loads include people, wind, waves, traffic, earthquakes, and blasts. Any structure can be subjected to dynamic loading. Dynamic analysis can be used to find dynamic displacements, time history, and the frequency content of the load. One analysis technique for calculating the linear response of structures to dynamic loading is a modal analysis. In modal analysis, we decompose the response of the structure into several vibration modes. A mode is defined by its frequency and shape. Structural engineers call the mode with the shortest frequency (the longest period) the fundamental mode. This paper presents a study on mode shape, inertia force, spring force and deflection of multi storied framed structures by comparison of stodola’s and Holzer method. This study involves in examination of theoretical investigations of multi storied framed structures. Overall four storey multi storied framed structures and two methods were analysed & comparison of all the mode shape, inertia force, spring force and deflection at the critical cross-section with same configuration loading by keeping all other parameters constant. The theoretical data are calculated using code IS 1893, IS 4326, IS 13920. The all storey mass and stiffens are analysed under the cantilever condition. The research project aims to provide which method is most accuracy to find the mode shape, spring force deflection and inertia force. The studies reveal that the theoretical investigations Stodola’s method is most accuracy compare to the Holzer method. The maximum mode shape, spring force, spring deflection and inertia force is 87.29%, 80 %, 89% and 72% is higher the Stodola’s method compare than Holzer method in same configuration.
Modelling and analysis of multicopter frame and propellereSAT Journals
Abstract Man with the advancement of technology invented various UAV’s and flying machines. These can be used for various purposes. Most of them are extensively used for defense purposes and the rest are used even in domestic purposes. A Quadrocopter, commonly called as Quadrotor, is a UAV (Unmanned Aerial Vehicle) which was propelled and lifted by four rotors. Battery was used as a power source to run the motors, thereby propellers. Modeling and Analyzing are the two important unavoidable steps in manufacturing any component or structure. In this paper we were concentrating on design and analysis of a Quadrocopter frame and propeller. The modeling was carried out using advanced software, named PRO-E while the analysis of components was done using ANSYS 13.0 version. The results obtained were compared with the various properties of frame materials which tell us whether the design made was safe or not. Keywords: Ansys, Multicopter, Pro/E
Design and manufacture of an angle adjustable crutch with kennedy key mechanismeSAT Journals
Abstract A crutch is a mobility aid that transfers weight from the legs to the upper body. It has been observed that users of walking aids require double the energy than the normal gait. Users experience a lot of stress at underarm and wrist while using standard underarm or forearm crutches which is the primary reason for pain and various medical complications. Therefore, a new design of crutch has been developed which allows the user to apply his/her weight over a larger area along the forearm instead of wrist and underarm. The primary objective of the study is provide more comfort to the end user of the crutch. The modeling of the new crutch design has been done using CAD modeling package (Catia). Finite Element Analysis (FEA) of the design has been conducted using ANSYS to understand the stress behavior in the new model. The new crutch has been fabricated using aluminum alloy because of its properties like high strength to weight ratio and low density. The fabrication of the new crutch has been performed in such a way that it ensured the entire crutch can be disassembled easily thus making it easily transportable. The testing of the new crutch has been carried out using energy expenditure method to assess the comfort level of the user. Keywords: Finite element analysis, crutch, gait, energy expenditure method, CAD
IRJET- Stress Concentration of Plate with Rectangular CutoutIRJET Journal
This document discusses a study that analyzes stress concentration in plates with various shaped cutouts using finite element analysis software (ANSYS). The study compares stress concentration factors around circular, square, and rectangular cutouts in metallic plates made of materials like mild steel and aluminum. Experimental tensile tests are also conducted on plates with different cutout shapes and loaded in one direction. Results from the finite element analysis are validated by comparing with experimental test results, finding them to be relatively similar. The stress concentration is highest for plates with cutouts that have more oriented geometries compared to a baseline. Orientation is identified as an important factor in reducing stress concentration.
Similar to FATIGUE ANALYSIS OF VARIABLE DIFFUSER (20)
DEVELOPMENT OF TODDLER FAMILY CADRE TRAINING BASED ON ANDROID APPLICATIONS IN...AM Publications
Toddler family cadre is a community members work voluntarily in fostering and providing information to parents of toddlers about how to properly care for children. Toddler Family cadre desperately need training to increase their skills. There are still a few Toddler family cadres who get training so that the knowledge and skills of parents and other family members in developing toddlers' growth through physical stimulation, motoric intelligence, emotional and social economy as well as possible are still lacking. The purpose of this study is to develop an Android- assisted Toddler family cadre training model in Demak. This research is research in tian research and development. The research location was in Demak Regency. Toddler family cadres became the object of this research. Development of Toddler family cadre training models assisted by Android in Demak is feasible to be used as an effort to improve Toddler Family cadres' capabilities.
TESTING OF COMPOSITE ON DROP-WEIGHT IMPACT TESTING AND DAMAGE IDENTIFICATION ...AM Publications
In recent years the use of composite materials in structural components has become increasingly common in a wide range of engineering applications. Composite materials offer numerous advantages over more conventional materials because of their superior specific properties, but a serious obstacle to a more widespread use of these materials is their high sensitivity to localized impact loading. This paper presents an experimental study to assess the impact response of drop weight impact tests on fiber reinforced polymer composites with deferent load and damage identification of composite using Non-destructive testing techniques ultrasonic testing (UT) C scan. In the study includes checking the strength of the specimen, plotting of graphs between the height and the impact energy obtained and tabulating the results after conducting the various functional tests.
THE USE OF FRACTAL GEOMETRY IN TILING MOTIF DESIGNAM Publications
In this paper I will present the use of fractal geometry to design tile motifs. A fractal is a geometric figure that combines the several characteristics among others: its parts have the same form as the whole, fragmented, and formation by iteration. The concept of fractals has been spread over all fields of sciences, technology, and art. This paper aims to provide an algorithm to creating motifs of tile algorithm for create the tile motif consists of base, iteration, coloration and duplication. In order to help the reader better understand the algorithm, I will present some script using Matlab. We describe a mathematically based algorithm that can fill a spatial region with sequence of randomly placed which may be transformed copies of one motif or several motifs. By using this algorithm, I can produce thousand variety of aesthetically pleasing tile motifs, of which we show a number of examples.
TWO-DIMENSIONAL INVERSION FINITE ELEMENT MODELING OF MAGNETOTELLURIC DATA: CA...AM Publications
Two-dimensional resistivity analysis of magnetotelluric data has been done at “Z” geothermal area which is located in southern part of Indonesia. The objective is to understand subsurface structure beneath reasearch area based on 2-D modeling of magnetotelluric data. The inversion finite element method were used for numerical simulations which requires discretization on the boundary of the modeling domain. The modeling results of magnetotelluric data shows relativity structure dissemination: 0-10 ohm.m in a thickness of 1 km (Clay Cap), 10-100 ohm.m with 1-2 km depth respectively (reservoir zone), and on a scale of 100-1000 ohm.m in a depth of 2-3 km (heat source zone). The result of relativity structure can be used to delineate an area with geothermal prospect around 12 km2.
USING THE GENETIC ALGORITHM TO OPTIMIZE LASER WELDING PARAMETERS FOR MARTENSI...AM Publications
This document presents an optimization of laser welding parameters for martensitic stainless steel using a genetic algorithm. The algorithm aims to minimize the difference between the actual and desired weld size (width and depth) by optimizing laser power, welding speed, and fiber diameter. The genetic algorithm was run 10 times with a population of 30 over 200 iterations each time. The results showed errors between optimized and experimental values of less than 5% for the parameters. The study demonstrates that genetic algorithms can effectively optimize laser welding parameters to achieve a preset weld size.
ANALYSIS AND DESIGN E-MARKETPLACE FOR MICRO, SMALL AND MEDIUM ENTERPRISESAM Publications
The Ministry of Cooperatives and Small and Medium Enterprises launched in 2018 the number of Micro, Small and Medium Enterprises (MSMEs) in Indonesia as many as 58.97 million people. It is predicted that the number of MSMEs players in 2019 will amount to 59.2 million. This shows that the Indonesian people have made changes in the field of family economics which initially as consumptive are now productive. The community prefers to carry out activities that can increase family income. Future MSMEs remain the mainstay of the national economy. In accordance with the government roadmap, in 2020 e-commerce transactions are predicted to reach Rp1,300 trillion or equivalent to USD130 billion. According to data from the Central Statistics Agency (BPS), the contribution of MSMEs to Indonesia's Gross Domestic Product (GDP) reached 61.41%, with the number of MSMEs reaching almost 60 million units. However, only around 8% or 3.79 million of the 59.2 million MSMEs players have used online platforms to market their products. Based on the above problems, researchers conducted research on the analysis and display of E-Marketplace for MSMEs in Indonesia. The type of research used is action research. The object of research is MSMEs which are under the Office of Industry and Trade of Sragen Regency. The method of data collection is by techniques: (1) interview, (2) documentation (3) observation, (4) literature study. The researcher uses the waterfall method in developing the system. The research team has successfully analyzed the E-Market place according to the results of data collection. The research team has succeeded in designing the E-Marketplace for MSMEs. E-Marketplace designed can be used by admin, MSME and user. Admin is in charge of managing E-Marketplace and has full access rights. MSMEs can register online and manage their products in E-Marketplace. Users or buyers can search data in E-Marketplace as desired. To make transactions, users can interact directly with MSMEs according to the data provided in E-Marketplace. E-Marketplace can be used for marketing together MSMEs products. This e-marketplace can be accessed at www.umkmonline.com
REMOTE SENSING AND GEOGRAPHIC INFORMATION SYSTEMS AM Publications
Remote sensing technology's increasing accessibility helps us observe research and learn about our globe in ways we could only imagine a generation ago. Guides to profound knowledge of historical, conceptual and practical uses of remote sensing which is increasing GIS technology. This paper will go briefly through remote sensing benefits, history, technology and the GIS and remote sensing integration and their applications. Remote sensing (RS) is used in mapping the predicted and actual species and dominates the ecosystem canopy.
EVALUATE THE STRAIN ENERGY ERROR FOR THE LASER WELD BY THE H-REFINEMENT OF TH...AM Publications
Currently, the finite element method (FEM) is still one of the useful tools in numerical simulation for technical problems. With this method, a continuum model presented by a certain number of elements with a simple approximation field causes the presence of discretization error in solutions. This paper considers the butt weld by laser which subjected the tension for AISI 1018 steel highness 8 mm. The aim of the study is to use the h-refinement of the FEM in estimation the strain energy error for the laser weld mentioned. The results show that the stability of the h-refinement shown by the value of the relative error of the strain energy is quite small, specifically; FEM is less than 5.7% and extra is no more than 3.7%.
HMM APPLICATION IN ISOLATED WORD SPEECH RECOGNITIONAM Publications
Speech recognition is always being an all-time trendy topic for discussion and also for researches and we see a major application in our life. This paper provides the work done on the application of Hidden Markov model to implement isolated word speech recognition on MATLAB and to develop and train the system for set of self-selective words for specific user (user dependent) to get maximum efficiency in word recognition system. Which uses the forward and Baum-welch algorithm and fitting Gaussian of the Baum-welch algorithm for all the iteration perform. We use a sample of 7 alphabets which are recorded in 15 different ways giving total of 105 word to use for training with each word with 15 variations. This system can be used in real world in system security using voice security system and mainly for children and impaired people.
PEDESTRIAN DETECTION IN LOW RESOLUTION VIDEOS USING A MULTI-FRAME HOG-BASED D...AM Publications
Detecting pedestrians in low resolution videos is a challenging task, due to the small size of pedestrians in the images and the limited information. In practical outdoor surveillance scenarios the pedestrian size is usually small. Existing state-of-the-art pedestrian detection methods that use histogram of oriented gradient (HOG) features have poor performance in this problem domain. To compensate for the lack of information in a single frame, we propose a novel detection method that recognizes pedestrians in a short sequence of frames. Namely, we take the single-frame HOG-based detector and extend it to multiple frames. Our detector is applied to regions containing potential moving objects. In the case of video taken from a moving camera on an aerial platform, video stabilization is first performed to register the frames. A classifier is then applied to features extracted from spatio-temporal volumes surrounding the potential moving objects. On challenging stationary and aerial video datasets, our detection accuracy outperforms several state-of-the-art algorithms.
The aim of this paper is to help the blind people to identify and catch the public transport vehicles with the help of Light Fidelity technology. It is a Navigation aid. When the bus arrives at the bus stand, transmitter in the bus transmits the light signals and receiver in the stick, receives the light signals and a sound signal is generated through the speaker present in the stick. The sound message contains the bus number and the destination of the bus. In addition to this, if the person is absconded or lost, details of the location will be sent to his/her family members by pressing a button. This is made possible with the help of Global System for Mobile (GSM). Finally, presence of water can be detected along the blind person’s path, with the help of water sensors.
EFFECT OF SILICON - RUBBER (SR) SHEETS AS AN ALTERNATIVE FILTER ON HIGH AND L...AM Publications
A digital radiography delivers a radiation dose to patients; therefore it poses potential risk to the patients. One effort to reduce dose is carried out using a radiation filter, e.g. Silicone Rubber (SR) sheet. The purpose of this research was to determine the impact of the SR sheet on the high contrast objects (HCO) and the low contrast objects (LCO). The dose reduction was determined from attenuation x-rays before and after using the SR sheet. Assessment of HCO and LCO was observed from CDR TOR phantom at tube voltage of 48 kVp and tube current of 8 mAs. The physical parameter to assess image quality was the Signal to Noise Ratio (SNR) value in LCO. The maximum x-ray attenuation using the SR sheet is 48.82%. The visibility of the HCO remains the same, namely 16 objects; however the LCO slighly decreases from 14 objects to 13 objects after using the SR sheet. The SNR value decreases with an average value of 15.17%.Therefore, the SR sheet as a alternative filter has no effect on the HCO and has realtively little effect on the LCO. Thus, the SR sheet potentially is used for radiation protection in patients, especially on examinations that do not require low contrast resolution.
UTILIZATION OF IMMUNIZATION SERVICES AMONG CHILDREN UNDER FIVE YEARS OF AGE I...AM Publications
Immunization is the key strategy to curb communicable diseases which are the number one killer of children under five. Immunization prevents mortalities of approximating three million children under five annually. This study aimed to assess utilization of immunization services among children under five of age in Kirinyaga County, Kenya.
REPRESENTATION OF THE BLOCK DATA ENCRYPTION ALGORITHM IN AN ANALYTICAL FORM F...AM Publications
The article presents the study of cryptographic transformations of the Kuznyechik algorithm in relation to differential analysis and the translation of their representations into a more convenient form for cryptanalysis. A simplification of the type of transformations of the algorithm to algebraic the form, in which cryptanalysis software will be more effective. Since the description of the algorithm in the analytical form allows for 16 cycles of execution of the shift register with linear feedback, each of which will be carried out 16 operations of multiplication and 15 operations of addition, reduced to 16 multiplying and 15 the operations of addition. The result is an algebraic form of a linear transformation (from a shift register with linear feedback to the multiplication of the matrix in a finite field). In the future, the algebraic type of transformation can be used to effectively carry out differential cryptanalysis.
Optical character recognition (OCR) is process of classification of optical patterns contained in a digital image. The process of OCR Recognition involves several steps including pre-processing, segmentation, feature extraction, classification. Pre-processing is for done the basic operation on input image like noise reduction which remove the noisy signal from image. Segmentation stage for segment the given image into line by line and segment each character from segmented line. Future extraction calculates the characteristics of character. A Radial Basis Function Neural Network (RBFNN) is used to classification contains the database and does the comparison.
Surveillance refers to the task of observing a scene, often for lengthy periods in search of particular objects or particular behaviour. This task has many applications, foremost among them is security (monitoring for undesirable behaviour such as theft or vandalism), but increasing numbers of others in areas such as agriculture also exist. Historically, closed circuit TV (CCTV) surveillance has been mundane and labour Intensive, involving personnel scanning multiple screens, but the advent of reasonably priced fast hardware means that automatic surveillance is becoming a realistic task to attempt in real time. Several attempts at this are underway.
SIMULATION OF ATMOSPHERIC POLLUTANTS DISPERSION IN AN URBAN ENVIRONMENTAM Publications
Interest in air pollution investigation of urban environment due to existence of industrial and commercial activities along with vehicular emission and existence of buildings and streets which setup natural barrier for pollutant dispersion in the urban environment has increased. The air pollution modelling is a multidisciplinary subject when the entire cities are taken under consideration where urban planning and geometries are complex which needs a large software packages to be developed like Operational Street Pollution Model (OSPM), California Line Source model (CALINE series) etc. On overviewing various works it can be summarized that the air pollutant dispersion in urban street canyons and all linked phenomenon such as wind flow, pollutant concentrations, temperature distribution etc. generally depend on wind speed and direction, building heights and density, road width, source and intensity of air pollution, meteorological variables like temperature, humidity etc. A unique and surprising case is observed every time on numerous combinations of these factors. The main aim of this study is to simulate the atmospheric pollutant dispersion for given pollutant like carbon monoxide, sulphur dioxide and nitrogen dioxide and given atmospheric conditions like wind speed and direction. Computational Fluid Dynamics (CFD) simulation for analysing the atmospheric pollutant dispersion is done after natural airflow analysis. Volume rendering is done for variables such as phase 2 volume fraction and velocity with resolution as 250 pixels per inch and transparency as 20%. It can be observed that all the three pollutant namely nitrogen dioxide, sulphur dioxide and carbon monoxide the phase 2 volume fraction changes from 0 to 1. The wind velocity changes from 3.395×10-13 m/s to 1.692×102 m/s. The dispersion of pollutants follow the sequence Sulphur dioxide>Carbon monoxide>Nitrogen dioxide.
PREPARATION AND EVALUATION OF WOOL KERATIN BASED CHITOSAN NANOFIBERS FOR AIR ...AM Publications
In this article, we have extracted keratin from deccani wool waste and prepared the wool keratin based Chitosan nanofibers by electrospinning technique. The prepared nanofibers mat were prepared with different weight percent ratio like 1wt.%, 3wt.% and 5wt.% with respect to polymer i.e Chitosan. The physicochemical and filtration properties of wool keratin based Chitosan nanofibers were studied. Wool keratin based Chitosan nanofibers were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC) and scanning electron microscopy (FESEM). The filtration efficiency of keratin Chitosan nanofibers were investigated through DOP test and heavy metal removal capacity of evaluated through Atomic absorption spectroscopy. FTIR results were showed that Keratin gets compatible with Chitosan. XRD patterns revealed keratin was in crystalline nature and increase the crystalline nature of Chitosan nanofibers. FESEM images showed that uniform nanofibers generation with average fiber diameter 80nm. Nanofibers filtration efficiency against a particulate matter in air was obtained more than 99.53% and excellent property of removal of heavy metal.
ANALYSIS ON LOAD BALANCING ALGORITHMS IMPLEMENTATION ON CLOUD COMPUTING ENVIR...AM Publications
Cloud computing means storing and accessing data and programs over the Internet instead of your computer's hard drive. The cloud is just a metaphor for the Internet. The elements involved in cloud computing are clients, data center and distributed server. One of the main problems in cloud computing is load balancing. Balancing the load means to distribute the workload among several nodes evenly so that no single node will be overloaded. Load can be of any type that is it can be CPU load, memory capacity or network load. In this paper we presented an architecture of load balancing and algorithm which will further improve the load balancing problem by minimizing the response time. In this paper, we have proposed the enhanced version of existing regulated load balancing approach for cloud computing by comping the Randomization and greedy load balancing algorithm. To check the performance of proposed approach, we have used the cloud analyst simulator (Cloud Analyst). Through simulation analysis, it has been found that proposed improved version of regulated load balancing approach has shown better performance in terms of cost, response time and data processing time.
A MODEL BASED APPROACH FOR IMPLEMENTING WLAN SECURITY AM Publications
This paper presents various security features and configurations commonly implemented in WLANs and their aggregated security levels and then proposes a model that enables implementation and evaluation of WLAN security
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024Sinan KOZAK
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
ACEP Magazine edition 4th launched on 05.06.2024Rahul
This document provides information about the third edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECTjpsjournal1
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressionsVictor Morales
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
International Conference on NLP, Artificial Intelligence, Machine Learning an...gerogepatton
International Conference on NLP, Artificial Intelligence, Machine Learning and Applications (NLAIM 2024) offers a premier global platform for exchanging insights and findings in the theory, methodology, and applications of NLP, Artificial Intelligence, Machine Learning, and their applications. The conference seeks substantial contributions across all key domains of NLP, Artificial Intelligence, Machine Learning, and their practical applications, aiming to foster both theoretical advancements and real-world implementations. With a focus on facilitating collaboration between researchers and practitioners from academia and industry, the conference serves as a nexus for sharing the latest developments in the field.
Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
Batteries -Introduction – Types of Batteries – discharging and charging of battery - characteristics of battery –battery rating- various tests on battery- – Primary battery: silver button cell- Secondary battery :Ni-Cd battery-modern battery: lithium ion battery-maintenance of batteries-choices of batteries for electric vehicle applications.
Fuel Cells: Introduction- importance and classification of fuel cells - description, principle, components, applications of fuel cells: H2-O2 fuel cell, alkaline fuel cell, molten carbonate fuel cell and direct methanol fuel cells.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
The CBC machine is a common diagnostic tool used by doctors to measure a patient's red blood cell count, white blood cell count and platelet count. The machine uses a small sample of the patient's blood, which is then placed into special tubes and analyzed. The results of the analysis are then displayed on a screen for the doctor to review. The CBC machine is an important tool for diagnosing various conditions, such as anemia, infection and leukemia. It can also help to monitor a patient's response to treatment.