Abstract: Chassis is the important part of an automobile. It supports the body and different parts of an automobile. Chassis consists of engine, brakes, power train, steering system and wheels mounted on a frame. Ƭhe frame is the main part of the chassis on which remaining parts of chassis are placed. Ƭhe chassis should be rigid enough to withstand the twist, shock, stresses, vibrations and bending moments to which it is subjected while vehicle is moving on road. Ƭhe trailer arm chassis frame has to carry and sustain the heavy loads which are applied on it. Hence it is very important to design and analysis of the trailer arm chassis frame. Ƭhe design of trailer arm chassis is carried out by taking the base model structure of chassis as a standard. The optimization technique to redesign Chassis (Frame) of a trailer is carried out here. The trailer had dimensional limits and must be able to reduce the overall size and shape and still lift the same amount of load. Different load cases with given boundary conditions & loadings are used. Ƭo improve the performance of the chassis finite element analysis is carried for various alternatives. Ƭhe analysis is performed by varying the thickness, shape and material to get the best possible design of the chassis. Static analysis is carried out for both basic and modified designs to determine the high stress regions, maximum displacement, and normal stress at critical positions of the chassis. Normal modal analysis for base model is carried out to find the first natural frequency. Normal modal analysis is carried out for all modified designs to improve the first natural frequency of the chassis in order to avoid the resonance. The whole challenging task, starting with pre processing, analysis and post processing is completed using Altair’s HyperMesh, Abaqus and HyperView FE package. Key Words: Trailer arm chassis, Static analysis and Modal analysis.
Abstract
When passenger car hits the truck-trailer at rear, it penetrates inside the truck bed called truck trailer under-ride crash. This is responsible for thousands of accidents, causing severe injuries and spot death. This is mostly due to the lack of effective guards. The Present work focuses on energy absorption analysis of a Rear under Run Protection Device (RUPD) under crash scenario. The aim of the study is to replace Steel RUPD with RUPD made of composite material to reduce weight of the vehicle. In this study carbon fibre reinforced plastic composites were selected due to their high specific strength and specific stiffness which make them a preferred candidate in the material selection for modern lightweight structures in automotive engineering which can contribute to the improvement of mileage in addition to safety of the occupants. The RUPD was modelled in CATIA. Finite element model was generated in HYPERMESH and analysed in LS-DYNA for both Carbon/Epoxy RUPD and Steel RUPD and observed that Carbon/Epoxy RUPD absorbs 50% of kinetic energy; whereas steel RUPD absorbs 90%. But weight of Steel RUPD is 75 kg whereas the weight of Carbon/Epoxy RUPD is less than Steel RUPD which found to be below 15 kg. This results in weight reduction and increases mileage of the vehicle. Considering above advantage, composites can be potential candidate for RUPD.
Keywords- Carbon/Epoxy, Catia, Hypermesh, LS-Dyna, RUPD, Steel
Paper on Design and Analysis of Wheel set assembly & Disassembly Hydraulic Pr...rahulmonikasharma
The wheels of the train are the part that carries the maximum static load, high axle load, high speeds, shocks and extreme weather conditions which expose them to and wear and tear which ultimately leads to failure. It is necessary for the railway department to maintain the wheels assembly for the safety and optimum working as defective wheel increases the risk of a train derailment. The wheels undergo periodic maintenance, and visual inspection is also carried out every day.To test the life and condition of the wheels special not destructive tests are carried out in every 18 months. This project is an industrial project for AI ENGINEERING ENTERPRISES. It involves the design and analysis of Hydraulic Press Machine which is used to assemble & dissemble the locomotive wheel set. In this part of paper we studied the different literatures for gaining the deep knowledge and also studying the work which was done related to our project.
Abstract
When passenger car hits the truck-trailer at rear, it penetrates inside the truck bed called truck trailer under-ride crash. This is responsible for thousands of accidents, causing severe injuries and spot death. This is mostly due to the lack of effective guards. The Present work focuses on energy absorption analysis of a Rear under Run Protection Device (RUPD) under crash scenario. The aim of the study is to replace Steel RUPD with RUPD made of composite material to reduce weight of the vehicle. In this study carbon fibre reinforced plastic composites were selected due to their high specific strength and specific stiffness which make them a preferred candidate in the material selection for modern lightweight structures in automotive engineering which can contribute to the improvement of mileage in addition to safety of the occupants. The RUPD was modelled in CATIA. Finite element model was generated in HYPERMESH and analysed in LS-DYNA for both Carbon/Epoxy RUPD and Steel RUPD and observed that Carbon/Epoxy RUPD absorbs 50% of kinetic energy; whereas steel RUPD absorbs 90%. But weight of Steel RUPD is 75 kg whereas the weight of Carbon/Epoxy RUPD is less than Steel RUPD which found to be below 15 kg. This results in weight reduction and increases mileage of the vehicle. Considering above advantage, composites can be potential candidate for RUPD.
Keywords- Carbon/Epoxy, Catia, Hypermesh, LS-Dyna, RUPD, Steel
Paper on Design and Analysis of Wheel set assembly & Disassembly Hydraulic Pr...rahulmonikasharma
The wheels of the train are the part that carries the maximum static load, high axle load, high speeds, shocks and extreme weather conditions which expose them to and wear and tear which ultimately leads to failure. It is necessary for the railway department to maintain the wheels assembly for the safety and optimum working as defective wheel increases the risk of a train derailment. The wheels undergo periodic maintenance, and visual inspection is also carried out every day.To test the life and condition of the wheels special not destructive tests are carried out in every 18 months. This project is an industrial project for AI ENGINEERING ENTERPRISES. It involves the design and analysis of Hydraulic Press Machine which is used to assemble & dissemble the locomotive wheel set. In this part of paper we studied the different literatures for gaining the deep knowledge and also studying the work which was done related to our project.
Design, Development and Operation of 3.5HP Power Tillerpaperpublications3
Abstract: A power tiller is a mechanized agricultural implement popularly used to save time, human efforts and fuel in preparation of soil bed. In this paper presents the design and fabrication of maintenance free and efficient 3.5HP lightweight power tiller. However, under complex abrasive environment, tiller blades are subjected to extreme surface wear, particularly in dry sand which considerably affects its service life. Our aim of this paper is to improve service life of the tiller blade. Working of transmission system is based on chain sprocket mechanism to reduce cost. Different component of machine are modeled by using modeling software CATIA V5R21. The developed model is useful for agricultural industry especially developing countries.
DESIGN AND ANALYSIS OF AN ACTIVE TWIST ROTOR BLADES WITH D-SPAR MODEL USING C...AM Publications
Today’s helicopters are the result of collaborative work in mechanical engineering and aeronautics. A helicopter main rotor or rotor system is the combination of a rotary wing and a control system that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aerodynamic drag in forward flight. In the field of rotorcraft, the research in this project is currently focusing on active blade systems to adapt the aerodynamic properties of the blade to the local aerodynamic conditions. Fuel-efficiency, reduction of vibration and noise and increase of the helicopter maximum speed are the benefits expected from these new technologies. A helicopter's rotor is generally made of two or more rotor blades. Rotor blades are made out of various materials, including aluminum, composite structure, and steel or titanium, with abrasion shields along the leading edge. The blade pitch is typically controlled by a swash plate connected to the helicopter flight controls. An Active Twist Rotor (ATR) is developed for future implementation of the individual blade control for vibration and noise reduction in helicopters. The rotor blade is integrally twisted by direct strain actuation using active fiber composites (AFC). In this thesis, the model of rotor blade is designed and analyzed. 3D models are done in CATIA. Analysis is done in Ansys. The materials used for original model are steel and Aluminum alloy, The modified model is analyzed by specifying aluminum alloy using solid element and also the shell element. The optimization results have been obtained for design solutions, connected with the application of active materials.
Optimization of power consumption of belt conveyer system by replacing adjust...eSAT Journals
Abstract The Conveyer System finds its Application where manual material transfer fails. Conveyor system is a common piece of mechanical handling equipment that moves materials from one location to another. Belt Conveyor systems are used widespread across a range of industries due to the numerous benefits they provide. Though these conveyors have numerous advantages they also require huge amount of power to drive belts. As the result of increased fuel prices in global markets and scarce of fuels electricity tariff is increasing tremendously. By reducing drive power requirement we can save huge amounts of money as well as reduce green house gas emissions.The project involves analysis of changes in power consumption by replacing the contact type internal scraper with Adjustable Type Non-contact internal scraper. Key Words:, scarce, emissions, scraper, etc…
Verification of Computer Aided Engineering (CAE) in Optimization of Chassis f...AM Publications
Computer Aided Engineering (CAE) has been an important tool in the process of automotive product development. Chassis of the automobile are subjected to excitations from the road conditions and due to engine operations during their life cycle. While designing this component, it should be ensured that it with stand the random vibration loads for the life cycle of the vehicle. The chassis was modelled in solid works and analyzed in ANSYS14.0 where it was subjected to vibration. The behaviors of structural steel, Mild steel, Cast iron gray, Aluminum alloy and Magnesium alloy were investigated under the same conditions. Cast iron gray were found to be the most suitable with maximum deformation of 0.10988m, maximum stress of 9.2398GPa and with least frequency of vibration of 53.961Hz.
Finite element analysis of engine mounting bracket by considering pretension ...eSAT Journals
Abstract Bracket is one of the important components of an engine mount assembly, heavy performance truck has their engine supported by bracket and this engine mounting brackets assembly is used in chassis front frame which has been designed as a framework to support engine along with transmission member. The main function of the engine mount bracket is to properly balance the engine and transmission on the vehicle chassis, engine mount is an important part of the vehicle to reduce the vibration and noise, by which smooth ride of the vehicle can be achieved. Vibration and strength of engine bracket has been continuously a concern which may lead to structural failure if the resulting vibration and stresses are severe and excessive. The present work focuses on the FEA analysis of engine mount bracket for three materials by using meshing and analysis software which are HYPERMESH and ABACUS, the materials used are cast iron, wrought iron and mild steel, modal analysis and static analysis carried out by which maximum von-misses stress and natural frequency are computed. The main objective is to select the best material from the obtained result under prescribed conditions. Key Words: Engine mount bracket, Vehicle chassis, Modal & Static analysis, pretension load, & Service load.
Design and analysis of a tubular space frame chassis of a high performance ra...eSAT Journals
Abstract Formula Student Racing competitions are held at various Formula SAE circuits globally. Students from different colleges worldwide thrive to build a Formula style race car to compete at these events. In lieu to the competition rules and regulations it is important to design the chassis of the car with utmost priority. The major challenge posed is to design and fabricate a light weight car without compromising on the safety of the driver. The car has to be rigidly fabricated at minimal expense. The work in this paper is based on the team NITK Racing’s Car; the DICV NR XIV. This paper showcases various methods of material selection, design optimization techniques and Finite element analysis (FEA) using ANSYS. The basic design is based on the anthropological data of the specified human (95th percentile male) allowing fast ingress and egress from the car. Following the final design selection the static structural analysis of the car was done and the consequent results have been plotted. The entire design and analysis process is based on FSAE 2013 rule book and knowledge of designing and manufacturing yesteryear’s car. Keywords: ergonomics, finite element analysis, roll cage, torsional rigidity, tubular space frame chassis, and validation test setup
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
Design, Development and Operation of 3.5HP Power Tillerpaperpublications3
Abstract: A power tiller is a mechanized agricultural implement popularly used to save time, human efforts and fuel in preparation of soil bed. In this paper presents the design and fabrication of maintenance free and efficient 3.5HP lightweight power tiller. However, under complex abrasive environment, tiller blades are subjected to extreme surface wear, particularly in dry sand which considerably affects its service life. Our aim of this paper is to improve service life of the tiller blade. Working of transmission system is based on chain sprocket mechanism to reduce cost. Different component of machine are modeled by using modeling software CATIA V5R21. The developed model is useful for agricultural industry especially developing countries.
DESIGN AND ANALYSIS OF AN ACTIVE TWIST ROTOR BLADES WITH D-SPAR MODEL USING C...AM Publications
Today’s helicopters are the result of collaborative work in mechanical engineering and aeronautics. A helicopter main rotor or rotor system is the combination of a rotary wing and a control system that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aerodynamic drag in forward flight. In the field of rotorcraft, the research in this project is currently focusing on active blade systems to adapt the aerodynamic properties of the blade to the local aerodynamic conditions. Fuel-efficiency, reduction of vibration and noise and increase of the helicopter maximum speed are the benefits expected from these new technologies. A helicopter's rotor is generally made of two or more rotor blades. Rotor blades are made out of various materials, including aluminum, composite structure, and steel or titanium, with abrasion shields along the leading edge. The blade pitch is typically controlled by a swash plate connected to the helicopter flight controls. An Active Twist Rotor (ATR) is developed for future implementation of the individual blade control for vibration and noise reduction in helicopters. The rotor blade is integrally twisted by direct strain actuation using active fiber composites (AFC). In this thesis, the model of rotor blade is designed and analyzed. 3D models are done in CATIA. Analysis is done in Ansys. The materials used for original model are steel and Aluminum alloy, The modified model is analyzed by specifying aluminum alloy using solid element and also the shell element. The optimization results have been obtained for design solutions, connected with the application of active materials.
Optimization of power consumption of belt conveyer system by replacing adjust...eSAT Journals
Abstract The Conveyer System finds its Application where manual material transfer fails. Conveyor system is a common piece of mechanical handling equipment that moves materials from one location to another. Belt Conveyor systems are used widespread across a range of industries due to the numerous benefits they provide. Though these conveyors have numerous advantages they also require huge amount of power to drive belts. As the result of increased fuel prices in global markets and scarce of fuels electricity tariff is increasing tremendously. By reducing drive power requirement we can save huge amounts of money as well as reduce green house gas emissions.The project involves analysis of changes in power consumption by replacing the contact type internal scraper with Adjustable Type Non-contact internal scraper. Key Words:, scarce, emissions, scraper, etc…
Verification of Computer Aided Engineering (CAE) in Optimization of Chassis f...AM Publications
Computer Aided Engineering (CAE) has been an important tool in the process of automotive product development. Chassis of the automobile are subjected to excitations from the road conditions and due to engine operations during their life cycle. While designing this component, it should be ensured that it with stand the random vibration loads for the life cycle of the vehicle. The chassis was modelled in solid works and analyzed in ANSYS14.0 where it was subjected to vibration. The behaviors of structural steel, Mild steel, Cast iron gray, Aluminum alloy and Magnesium alloy were investigated under the same conditions. Cast iron gray were found to be the most suitable with maximum deformation of 0.10988m, maximum stress of 9.2398GPa and with least frequency of vibration of 53.961Hz.
Finite element analysis of engine mounting bracket by considering pretension ...eSAT Journals
Abstract Bracket is one of the important components of an engine mount assembly, heavy performance truck has their engine supported by bracket and this engine mounting brackets assembly is used in chassis front frame which has been designed as a framework to support engine along with transmission member. The main function of the engine mount bracket is to properly balance the engine and transmission on the vehicle chassis, engine mount is an important part of the vehicle to reduce the vibration and noise, by which smooth ride of the vehicle can be achieved. Vibration and strength of engine bracket has been continuously a concern which may lead to structural failure if the resulting vibration and stresses are severe and excessive. The present work focuses on the FEA analysis of engine mount bracket for three materials by using meshing and analysis software which are HYPERMESH and ABACUS, the materials used are cast iron, wrought iron and mild steel, modal analysis and static analysis carried out by which maximum von-misses stress and natural frequency are computed. The main objective is to select the best material from the obtained result under prescribed conditions. Key Words: Engine mount bracket, Vehicle chassis, Modal & Static analysis, pretension load, & Service load.
Design and analysis of a tubular space frame chassis of a high performance ra...eSAT Journals
Abstract Formula Student Racing competitions are held at various Formula SAE circuits globally. Students from different colleges worldwide thrive to build a Formula style race car to compete at these events. In lieu to the competition rules and regulations it is important to design the chassis of the car with utmost priority. The major challenge posed is to design and fabricate a light weight car without compromising on the safety of the driver. The car has to be rigidly fabricated at minimal expense. The work in this paper is based on the team NITK Racing’s Car; the DICV NR XIV. This paper showcases various methods of material selection, design optimization techniques and Finite element analysis (FEA) using ANSYS. The basic design is based on the anthropological data of the specified human (95th percentile male) allowing fast ingress and egress from the car. Following the final design selection the static structural analysis of the car was done and the consequent results have been plotted. The entire design and analysis process is based on FSAE 2013 rule book and knowledge of designing and manufacturing yesteryear’s car. Keywords: ergonomics, finite element analysis, roll cage, torsional rigidity, tubular space frame chassis, and validation test setup
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
Design and analysis of an electric karteSAT Journals
Abstract This paper presents the design and analysis of an electric motor powered kart. The main aim of this paper is to reduce the usage of organic fuel powered vehicles and to design a vehicle which works efficiently in the emerging electric vehicle sector. In order to maintain the speed levels of the kart, seamless decision was made in motor selection. Alternate materials have been applied in the kart to reduce both static and dynamic forces in pursuance of improving the efficiency and performance of the kart. Detailed design of subsystems like chassis frame, steering system, electrical power train and braking mechanism has been done effectively. The main focus of the frame design was on the stability of the kart and safety of the driver. The CAD model of the kart was done in CREO 2.0. Aluminium alloy 6063 has been employed for the frame to reduce the overall weight. To check the feasibility of the frame design, finite element analysis has been done using ANSYS 14.5. The results obtained showed that the frame design was safe under maximal impact load conditions. Weight reduction was a major concern and hence linkage type steering was selected for the kart. Motor, the heart of the electric vehicle was selected and installed in such a way that it can perform well for an extended run time. PMDC motor was selected in this case. Speed control of the kart was done using a voltage controller. The kart is provided with a timing belt drive to achieve maximum efficiency in transmission of power from the motor to the wheels. Hydraulic disc brakes were provided for smooth and effective braking under both dry and wet conditions. Slick tires are used to provide more traction. Design calculations were carried out and optimum results were obtained. An extensive market survey was also done on frame material, brakes, motor, transmission system for cost and availability. International standards were followed throughout the design process. Keywords: Stability, Frame, Finite Element Analysis, PMDC Motor, Timing belt
Structural Analysis of Ladder Chassis Frame for Jeep Using Ansys IJMER
Automotive chassis frame is an important part of an automobile. The automotive chassis
frame is the structural backbone of any vehicle. The main function of chassis frame is to support the
body, different parts of an automobile and topayload placed upon it.The chassis frame has to withstand
the stresses developed as well as deformation occurs in it and to withstand the shock, twist vibration
and other stresses. Its principle function is to carry the maximum load for all designed operating
condition safelythat should be within a limit. On chassis, frame maximum shear stress and deflection
under maximum load are important criteria for design andanalysis. In these projects, we
havecalculated the von mises stress and shear stress for the chassis frame and the finite element
analysis has been donefor the validation on the chassis frame model of jeep. We have taken certain
material as Mild sheet steel, aluminium alloy and titanium alloy for the rectangular hollow box type to
design chassis frame of jeep.
Software used in this project, CATIA V5-[Product 1] for design purpose and ANSYS 14 is used for
analysis.
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…
DESIGN AND ANALYSIS OF HEAVY VEHICLE CHASSIS USING HONEY COMB STRUCTUREIjripublishers Ijri
Automotive chassis is a skeletal frame on which various mechanical parts like engine, tires, axle assemblies, brakes,
steering etc. are bolted. The chassis is considered to be the most significant component of an automobile. It is the most
crucial element that gives strength and stability to the vehicle under different conditions.
This thesis deals with the design optimization and material suggestion for heavy vehicle chassis (container vehicle).
In the first step literature survey will be conducted for further processes (for the selection of material and geometric
selection).
In the next step modeling will be done to carry out the analysis. Structural Analysis will be conducted using traditional
material M.S; Composite materials FRP (E-glass)& Carbon epoxy (S-2 glass), also analysis will be conducted on present
and updated models.
In the next step impact test and fatigue analysis will be conducted on same to find impact and fatigue characteristics.
Objective: By doing this project chassis manufacturing company can save time & efforts because of easy manufacturing
method. End user can save money on chassis purchase and savings on reduced fuel consumption due to low weight of
chassis with composites
Study of Different Parameters on the Chassis Space Frame For the Sports Car b...IOSR Journals
The concept of Finite Element Analysis of a chassis space frame has been highlighted in this project.
The topic has constrained the study of the chassis space frame. Complex assemblies are to be avoided, for
sports car. The model of the chassis space frame is built using CATIA V5 and then imported to ANSYS CLASSIC
11.0 to find its finite element module. To perform a torsion and Bending Test on the computational prototype
chassis to determine its torsional stiffness. To incorporate a design improvement study and note the effects on
the global torsional stiffness of the chassis. The stress ,strength and degrees of freedom of the chassis will be
investigated. The body shape is fixed and therefore the overall external shape of the chassis must not be altered.
The engine bay must remain as open as possible to allow a variety of engines to be fitted
Finite Element Analysis of Fire Truck Chassis for Steel and Carbon Fiber Mate...IJERA Editor
Chassis is the foremost component of an automobile that acts as the frame to support the vehicle body. Hence the frame ought to be very rigid and robust enough to resist shocks vibrations and stresses acting on a moving vehicle. Steel in its numerous forms is commonly used material for producing chassis and overtime alumimium has acquired its use. However, in this study traditional materials are replaced with ultra light weight carbon fiber materials. High strength and low weight of carbon fibers makes it ideal for manufacturing automotive chassis. This paper depicts the modal and static structural analysis of TATA 407 fire truck chassis frame for steel as well as carbon fibers. From the analyzed results, stress, strain and total deformation values were compared for both the materials. Since it is easy to analyze structural systems by finite element method, the chassis is modified using PRO-E and the Finite Element Analysis is performed on ANSYS workbench.
Model development and the shape optimization analysis of a rear knuckle for r...eSAT Journals
Abstract Automotive motorsport sector demands lightweight car component that directly contributes to fuel efficiency of a race car. Currently, EIMA Race Car got issues with the car weight. The current knuckle is heavy and did not undergo design process and analysis. The race cars need to compete with others in a 15 laps of endurance race. Refueling is prohibited during the race, thus it is very important to ensure the parts are in top condition and lightweight. By using the selected method and optimization tool for the rear knuckle, this paper looks into the design and development of a knuckle for EIMA race car. Solidworks has been used as a design tool and analysis process. The final design then undergoes an optimization process and the proposed design has been fabricated. The result can be considered successful as the new design is 70% lighter than the current rear knuckle. Keywords: Product Design, simulation, race car knuckle, lightweight, optimization.
Design, analysis and performance evaluation of a mechanical gyratorIjrdt Journal
The project focuses on the development of an efficient and safe system for navigation for disabled people. Such a system should enable the user to control with minimum effort and should be stable in all practical situations. A gyrator is neither a motorcycle nor a four wheeler. It is a vehicle made up of an inner frame which is encompassed and supported by two large coaxially aligned wheels. The inner frame is supported by a common axle as a result, is free to oscillate back and forth relative to outer wheels. The inherent instability has limited its potential as a commercially available vehicle. But by reducing this oscillation to an optimum value by incorporating internal braking, we could make a very stable navigation system. In order to achieve motion, a shift in the centre of gravity of the inner frame is required. Two independent electric motors provide the driving torque to gearbox which drives the large outer wheels. This unique design gives the vehicle a clear advantage over conventional 4wheeled and 2wheeled vehicles as it has zero turning radius. Key word:- Inflation Pressure, Pressure switch ,Pressure guage, Solenoid control valve, DC Compressor.
Design of Efficycle- Human Powered Light Weight Hybrid Tricycle with Inbuilt ...ABHAY TIWARI
Any innovation or technology cannot be possible until and unless the work is not done by a team. In such a manner members
of Team GARUD (participants of SAE-NIS 2015), who are highly motivated individuals are recklessly working towards the
realization of this goal since its very inception. This paper provides in detail, about the design considerations, and methodology
used in designing and developing it. The designing of the vehicle has done on SOLID-WORKS 2014 while the design analysis
has done on ANSYS-2014. Various lightweight approaches like a lightweight seat, wheel, steering have also adopted. The
innovations include the use of rear wheel steering instead of conventional front wheel steering that meets the need of the
market and can be produced by a fictitious firm effectively so, Human powered hybrid vehicle presents the new milestone in
the realm of “Green technology”.
Mechanical properties of hybrid fiber reinforced concrete for pavementseSAT Journals
Abstract
The effect of addition of mono fibers and hybrid fibers on the mechanical properties of concrete mixture is studied in the present
investigation. Steel fibers of 1% and polypropylene fibers 0.036% were added individually to the concrete mixture as mono fibers and
then they were added together to form a hybrid fiber reinforced concrete. Mechanical properties such as compressive, split tensile and
flexural strength were determined. The results show that hybrid fibers improve the compressive strength marginally as compared to
mono fibers. Whereas, hybridization improves split tensile strength and flexural strength noticeably.
Keywords:-Hybridization, mono fibers, steel fiber, polypropylene fiber, Improvement in mechanical properties.
Material management in construction – a case studyeSAT Journals
Abstract
The objective of the present study is to understand about all the problems occurring in the company because of improper application
of material management. In construction project operation, often there is a project cost variance in terms of the material, equipments,
manpower, subcontractor, overhead cost, and general condition. Material is the main component in construction projects. Therefore,
if the material management is not properly managed it will create a project cost variance. Project cost can be controlled by taking
corrective actions towards the cost variance. Therefore a methodology is used to diagnose and evaluate the procurement process
involved in material management and launch a continuous improvement was developed and applied. A thorough study was carried
out along with study of cases, surveys and interviews to professionals involved in this area. As a result, a methodology for diagnosis
and improvement was proposed and tested in selected projects. The results obtained show that the main problem of procurement is
related to schedule delays and lack of specified quality for the project. To prevent this situation it is often necessary to dedicate
important resources like money, personnel, time, etc. To monitor and control the process. A great potential for improvement was
detected if state of the art technologies such as, electronic mail, electronic data interchange (EDI), and analysis were applied to the
procurement process. These helped to eliminate the root causes for many types of problems that were detected.
Managing drought short term strategies in semi arid regions a case studyeSAT Journals
Abstract
Drought management needs multidisciplinary action. Interdisciplinary efforts among the experts in various fields of the droughts
prone areas are helpful to achieve tangible and permanent solution for this recurring problem. The Gulbarga district having the total
area around 16, 240 sq.km, and accounts 8.45 per cent of the Karnataka state area. The district has been situated with latitude 17º 19'
60" North and longitude of 76 º 49' 60" east. The district is situated entirely on the Deccan plateau positioned at a height of 300 to
750 m above MSL. Sub-tropical, semi-arid type is one among the drought prone districts of Karnataka State. The drought
management is very important for a district like Gulbarga. In this paper various short term strategies are discussed to mitigate the
drought condition in the district.
Keywords: Drought, South-West monsoon, Semi-Arid, Rainfall, Strategies etc.
Life cycle cost analysis of overlay for an urban road in bangaloreeSAT Journals
Abstract
Pavements are subjected to severe condition of stresses and weathering effects from the day they are constructed and opened to traffic
mainly due to its fatigue behavior and environmental effects. Therefore, pavement rehabilitation is one of the most important
components of entire road systems. This paper highlights the design of concrete pavement with added mono fibers like polypropylene,
steel and hybrid fibres for a widened portion of existing concrete pavement and various overlay alternatives for an existing
bituminous pavement in an urban road in Bangalore. Along with this, Life cycle cost analyses at these sections are done by Net
Present Value (NPV) method to identify the most feasible option. The results show that though the initial cost of construction of
concrete overlay is high, over a period of time it prove to be better than the bituminous overlay considering the whole life cycle cost.
The economic analysis also indicates that, out of the three fibre options, hybrid reinforced concrete would be economical without
compromising the performance of the pavement.
Keywords: - Fatigue, Life cycle cost analysis, Net Present Value method, Overlay, Rehabilitation
Laboratory studies of dense bituminous mixes ii with reclaimed asphalt materialseSAT Journals
Abstract
The issue of growing demand on our nation’s roadways over that past couple of decades, decreasing budgetary funds, and the need to
provide a safe, efficient, and cost effective roadway system has led to a dramatic increase in the need to rehabilitate our existing
pavements and the issue of building sustainable road infrastructure in India. With these emergency of the mentioned needs and this
are today’s burning issue and has become the purpose of the study.
In the present study, the samples of existing bituminous layer materials were collected from NH-48(Devahalli to Hassan) site.The
mixtures were designed by Marshall Method as per Asphalt institute (MS-II) at 20% and 30% Reclaimed Asphalt Pavement (RAP).
RAP material was blended with virgin aggregate such that all specimens tested for the, Dense Bituminous Macadam-II (DBM-II)
gradation as per Ministry of Roads, Transport, and Highways (MoRT&H) and cost analysis were carried out to know the economics.
Laboratory results and analysis showed the use of recycled materials showed significant variability in Marshall Stability, and the
variability increased with the increase in RAP content. The saving can be realized from utilization of recycled materials as per the
methodology, the reduction in the total cost is 19%, 30%, comparing with the virgin mixes.
Keywords: Reclaimed Asphalt Pavement, Marshall Stability, MS-II, Dense Bituminous Macadam-II
Laboratory investigation of expansive soil stabilized with natural inorganic ...eSAT Journals
Abstract
Soil stabilization has proven to be one of the oldest techniques to improve the soil properties. Literature review conducted revealed
that uses of natural inorganic stabilizers are found to be one of the best options for soil stabilization. In this regard an attempt has
been made to evaluate the influence of RBI-81 stabilizer on properties of black cotton soil through laboratory investigations. Black
cotton soil with varying percentages of RBI-81 viz., 0, 0.5, 1, 1.5, 2, and 2.5 percent were studied for moisture density relationships
and strength behaviour of soils. Also the effect of curing period was evaluated as literature review clearly emphasized the strength
gain of soils stabilized with RBI-81 over a period of time. The results obtained shows that the unconfined compressive strength of
specimens treated with RBI-81 increased approximately by 250% for a curing period of 28 days as compared to virgin soil. Further
the CBR value improved approximately by 400%. The studies indicated an increasing trend for soil strength behaviour with
increasing percentage of RBI-81 suggesting its potential applications in soil stabilization.
Influence of reinforcement on the behavior of hollow concrete block masonry p...eSAT Journals
Abstract
Reinforced masonry was developed to exploit the strength potential of masonry and to solve its lack of tensile strength. Experimental
and analytical studies have been carried out to investigate the effect of reinforcement on the behavior of hollow concrete block
masonry prisms under compression and to predict ultimate failure compressive strength. In the numerical program, three dimensional
non-linear finite elements (FE) model based on the micro-modeling approach is developed for both unreinforced and reinforced
masonry prisms using ANSYS (14.5). The proposed FE model uses multi-linear stress-strain relationships to model the non-linear
behavior of hollow concrete block, mortar, and grout. Willam-Warnke’s five parameter failure theory has been adopted to model the
failure of masonry materials. The comparison of the numerical and experimental results indicates that the FE models can successfully
capture the highly nonlinear behavior of the physical specimens and accurately predict their strength and failure mechanisms.
Keywords: Structural masonry, Hollow concrete block prism, grout, Compression failure, Finite element method,
Numerical modeling.
Influence of compaction energy on soil stabilized with chemical stabilizereSAT Journals
Abstract
Increase in traffic along with heavier magnitude of wheel loads cause rapid deterioration in pavements. There is a need to improve
density, strength of soil subgrade and other pavement layers. In this study an attempt is made to improve the properties of locally
available loamy soil using twin approaches viz., i) increasing the compaction of soil and ii) treating the soil with chemical stabilizer.
Laboratory studies are carried out on both untreated and treated soil samples compacted by different compaction efforts. Studies
show that increase in compaction effort results in increase in density of soil. However in soil treated with chemical stabilizer, rate of
increase in density is not significant. The soil treated with chemical stabilizer exhibits improvement in both strength and performance
properties.
Keywords: compaction, density, subgradestabilization, resilient modulus
Geographical information system (gis) for water resources managementeSAT Journals
Abstract
Water resources projects are inherited with overlapping and at times conflicting objectives. These projects are often of varied sizes
ranging from major projects with command areas of millions of hectares to very small projects implemented at the local level. Thus,
in all these projects there is seldom proper coordination which is essential for ensuring collective sustainability.
Integrated watershed development and management is the accepted answer but in turn requires a comprehensive framework that can
enable planning process involving all the stakeholders at different levels and scales is compulsory. Such a unified hydrological
framework is essential to evaluate the cause and effect of all the proposed actions within the drainage basins.
The present paper describes a hydrological framework developed in the form of a Hydrologic Information System (HIS) which is
intended to meet the specific information needs of the various line departments of a typical State connected with water related aspects.
The HIS consist of a hydrologic information database coupled with tools for collating primary and secondary data and tools for
analyzing and visualizing the data and information. The HIS also incorporates hydrological model base for indirect assessment of
various entities of water balance in space and time. The framework would be maintained and updated to reflect fully the most
accurate ground truth data and the infrastructure requirements for planning and management.
Keywords: Hydrological Information System (HIS); WebGIS; Data Model; Web Mapping Services
Forest type mapping of bidar forest division, karnataka using geoinformatics ...eSAT Journals
Abstract
The study demonstrate the potentiality of satellite remote sensing technique for the generation of baseline information on forest types
including tree plantation details in Bidar forest division, Karnataka covering an area of 5814.60Sq.Kms. The Total Area of Bidar
forest division is 5814Sq.Kms analysis of the satellite data in the study area reveals that about 84% of the total area is Covered by
crop land, 1.778% of the area is covered by dry deciduous forest, 1.38 % of mixed plantation, which is very threatening to the
environmental stability of the forest, future plantation site has been mapped. With the use of latest Geo-informatics technology proper
and exact condition of the trees can be observed and necessary precautions can be taken for future plantation works in an appropriate
manner
Keywords:-RS, GIS, GPS, Forest Type, Tree Plantation
Factors influencing compressive strength of geopolymer concreteeSAT Journals
Abstract
To study effects of several factors on the properties of fly ash based geopolymer concrete on the compressive strength and also the
cost comparison with the normal concrete. The test variables were molarities of sodium hydroxide(NaOH) 8M,14M and 16M, ratio of
NaOH to sodium silicate (Na2SiO3) 1, 1.5, 2 and 2.5, alkaline liquid to fly ash ratio 0.35 and 0.40 and replacement of water in
Na2SiO3 solution by 10%, 20% and 30% were used in the present study. The test results indicated that the highest compressive
strength 54 MPa was observed for 16M of NaOH, ratio of NaOH to Na2SiO3 2.5 and alkaline liquid to fly ash ratio of 0.35. Lowest
compressive strength of 27 MPa was observed for 8M of NaOH, ratio of NaOH to Na2SiO3 is 1 and alkaline liquid to fly ash ratio of
0.40. Alkaline liquid to fly ash ratio of 0.35, water replacement of 10% and 30% for 8 and 16 molarity of NaOH and has resulted in
compressive strength of 36 MPa and 20 MPa respectively. Superplasticiser dosage of 2 % by weight of fly ash has given higher
strength in all cases.
Keywords: compressive strength, alkaline liquid, fly ash
Experimental investigation on circular hollow steel columns in filled with li...eSAT Journals
Abstract
Composite Circular hollow Steel tubes with and without GFRP infill for three different grades of Light weight concrete are tested for
ultimate load capacity and axial shortening , under Cyclic loading. Steel tubes are compared for different lengths, cross sections and
thickness. Specimens were tested separately after adopting Taguchi’s L9 (Latin Squares) Orthogonal array in order to save the initial
experimental cost on number of specimens and experimental duration. Analysis was carried out using ANN (Artificial Neural
Network) technique with the assistance of Mini Tab- a statistical soft tool. Comparison for predicted, experimental & ANN output is
obtained from linear regression plots. From this research study, it can be concluded that *Cross sectional area of steel tube has most
significant effect on ultimate load carrying capacity, *as length of steel tube increased- load carrying capacity decreased & *ANN
modeling predicted acceptable results. Thus ANN tool can be utilized for predicting ultimate load carrying capacity for composite
columns.
Keywords: Light weight concrete, GFRP, Artificial Neural Network, Linear Regression, Back propagation, orthogonal
Array, Latin Squares
Experimental behavior of circular hsscfrc filled steel tubular columns under ...eSAT Journals
Abstract
This paper presents an outlook on experimental behavior and a comparison with predicted formula on the behaviour of circular
concentrically loaded self-consolidating fibre reinforced concrete filled steel tube columns (HSSCFRC). Forty-five specimens were
tested. The main parameters varied in the tests are: (1) percentage of fiber (2) tube diameter or width to wall thickness ratio (D/t
from 15 to 25) (3) L/d ratio from 2.97 to 7.04 the results from these predictions were compared with the experimental data. The
experimental results) were also validated in this study.
Keywords: Self-compacting concrete; Concrete-filled steel tube; axial load behavior; Ultimate capacity.
Evaluation of punching shear in flat slabseSAT Journals
Abstract
Flat-slab construction has been widely used in construction today because of many advantages that it offers. The basic philosophy in
the design of flat slab is to consider only gravity forces; this method ignores the effect of punching shear due to unbalanced moments
at the slab column junction which is critical. An attempt has been made to generate generalized design sheets which accounts both
punching shear due to gravity loads and unbalanced moments for cases (a) interior column; (b) edge column (bending perpendicular
to shorter edge); (c) edge column (bending parallel to shorter edge); (d) corner column. These design sheets are prepared as per
codal provisions of IS 456-2000. These design sheets will be helpful in calculating the shear reinforcement to be provided at the
critical section which is ignored in many design offices. Apart from its usefulness in evaluating punching shear and the necessary
shear reinforcement, the design sheets developed will enable the designer to fix the depth of flat slab during the initial phase of the
design.
Keywords: Flat slabs, punching shear, unbalanced moment.
Evaluation of performance of intake tower dam for recent earthquake in indiaeSAT Journals
Abstract
Intake towers are typically tall, hollow, reinforced concrete structures and form entrance to reservoir outlet works. A parametric
study on dynamic behavior of circular cylindrical towers can be carried out to study the effect of depth of submergence, wall thickness
and slenderness ratio, and also effect on tower considering dynamic analysis for time history function of different soil condition and
by Goyal and Chopra accounting interaction effects of added hydrodynamic mass of surrounding and inside water in intake tower of
dam
Key words: Hydrodynamic mass, Depth of submergence, Reservoir, Time history analysis,
Evaluation of operational efficiency of urban road network using travel time ...eSAT Journals
Abstract
Efficiency of the road network system is analyzed by travel time reliability measures. The study overlooks on an important measure of
travel time reliability and prioritizing Tiruchirappalli road network. Traffic volume and travel time were collected using license plate
matching method. Travel time measures were estimated from average travel time and 95th travel time. Effect of non-motorized vehicle
on efficiency of road system was evaluated. Relation between buffer time index and traffic volume was created. Travel time model has
been developed and travel time measure was validated. Then service quality of road sections in network were graded based on
travel time reliability measures.
Keywords: Buffer Time Index (BTI); Average Travel Time (ATT); Travel Time Reliability (TTR); Buffer Time (BT).
Estimation of surface runoff in nallur amanikere watershed using scs cn methodeSAT Journals
Abstract
The development of watershed aims at productive utilization of all the available natural resources in the entire area extending from
ridge line to stream outlet. The per capita availability of land for cultivation has been decreasing over the years. Therefore, water and
the related land resources must be developed, utilized and managed in an integrated and comprehensive manner. Remote sensing and
GIS techniques are being increasingly used for planning, management and development of natural resources. The study area, Nallur
Amanikere watershed geographically lies between 110 38’ and 110 52’ N latitude and 760 30’ and 760 50’ E longitude with an area of
415.68 Sq. km. The thematic layers such as land use/land cover and soil maps were derived from remotely sensed data and overlayed
through ArcGIS software to assign the curve number on polygon wise. The daily rainfall data of six rain gauge stations in and around
the watershed (2001-2011) was used to estimate the daily runoff from the watershed using Soil Conservation Service - Curve Number
(SCS-CN) method. The runoff estimated from the SCS-CN model was then used to know the variation of runoff potential with different
land use/land cover and with different soil conditions.
Keywords: Watershed, Nallur watershed, Surface runoff, Rainfall-Runoff, SCS-CN, Remote Sensing, GIS.
Estimation of morphometric parameters and runoff using rs & gis techniqueseSAT Journals
Abstract
Land and water are the two vital natural resources, the optimal management of these resources with minimum adverse environmental
impact are essential not only for sustainable development but also for human survival. Satellite remote sensing with geographic
information system has a pragmatic approach to map and generate spatial input layers of predicting response behavior and yield of
watershed. Hence, in the present study an attempt has been made to understand the hydrological process of the catchment at the
watershed level by drawing the inferences from moprhometric analysis and runoff. The study area chosen for the present study is
Yagachi catchment situated in Chickamaglur and Hassan district lies geographically at a longitude 75⁰52’08.77”E and
13⁰10’50.77”N latitude. It covers an area of 559.493 Sq.km. Morphometric analysis is carried out to estimate morphometric
parameters at Micro-watershed to understand the hydrological response of the catchment at the Micro-watershed level. Daily runoff
is estimated using USDA SCS curve number model for a period of 10 years from 2001 to 2010. The rainfall runoff relationship of the
study shows there is a positive correlation.
Keywords: morphometric analysis, runoff, remote sensing and GIS, SCS - method
-
Effect of variation of plastic hinge length on the results of non linear anal...eSAT Journals
Abstract The nonlinear Static procedure also well known as pushover analysis is method where in monotonically increasing loads are applied to the structure till the structure is unable to resist any further load. It is a popular tool for seismic performance evaluation of existing and new structures. In literature lot of research has been carried out on conventional pushover analysis and after knowing deficiency efforts have been made to improve it. But actual test results to verify the analytically obtained pushover results are rarely available. It has been found that some amount of variation is always expected to exist in seismic demand prediction of pushover analysis. Initial study is carried out by considering user defined hinge properties and default hinge length. Attempt is being made to assess the variation of pushover analysis results by considering user defined hinge properties and various hinge length formulations available in literature and results compared with experimentally obtained results based on test carried out on a G+2 storied RCC framed structure. For the present study two geometric models viz bare frame and rigid frame model is considered and it is found that the results of pushover analysis are very sensitive to geometric model and hinge length adopted. Keywords: Pushover analysis, Base shear, Displacement, hinge length, moment curvature analysis
Effect of use of recycled materials on indirect tensile strength of asphalt c...eSAT Journals
Abstract
Depletion of natural resources and aggregate quarries for the road construction is a serious problem to procure materials. Hence
recycling or reuse of material is beneficial. On emphasizing development in sustainable construction in the present era, recycling of
asphalt pavements is one of the effective and proven rehabilitation processes. For the laboratory investigations reclaimed asphalt
pavement (RAP) from NH-4 and crumb rubber modified binder (CRMB-55) was used. Foundry waste was used as a replacement to
conventional filler. Laboratory tests were conducted on asphalt concrete mixes with 30, 40, 50, and 60 percent replacement with RAP.
These test results were compared with conventional mixes and asphalt concrete mixes with complete binder extracted RAP
aggregates. Mix design was carried out by Marshall Method. The Marshall Tests indicated highest stability values for asphalt
concrete (AC) mixes with 60% RAP. The optimum binder content (OBC) decreased with increased in RAP in AC mixes. The Indirect
Tensile Strength (ITS) for AC mixes with RAP also was found to be higher when compared to conventional AC mixes at 300C.
Keywords: Reclaimed asphalt pavement, Foundry waste, Recycling, Marshall Stability, Indirect tensile strength.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
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Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Optimization study on trailer arm chassis by finite element method
1. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 122
OPTIMIZATION STUDY ON TRAILER ARM CHASSIS BY FINITE
ELEMENT METHOD
Mohammed Fouzan K1
, Raghavendra K2
1
P.G. Student, Mechanical Engineering Department, B.I.T.M., Bellary
2
Assistant Professor, Mechanical Engineering Department, B.I.T.M., Bellary
Abstract:
Chassis is the important part of an automobile. It supports the body and different parts of an automobile. Chassis consists of
engine, brakes, power train, steering system and wheels mounted on a frame. Ƭhe frame is the main part of the chassis on which
remaining parts of chassis are placed. Ƭhe chassis should be rigid enough to withstand the twist, shock, stresses, vibrations and
bending moments to which it is subjected while vehicle is moving on road. Ƭhe trailer arm chassis frame has to carry and sustain
the heavy loads which are applied on it. Hence it is very important to design and analysis of the trailer arm chassis frame. Ƭhe
design of trailer arm chassis is carried out by taking the base model structure of chassis as a standard. The optimization technique
to redesign Chassis (Frame) of a trailer is carried out here. The trailer had dimensional limits and must be able to reduce the
overall size and shape and still lift the same amount of load. Different load cases with given boundary conditions & loadings are
used. Ƭo improve the performance of the chassis finite element analysis is carried for various alternatives. Ƭhe analysis is
performed by varying the thickness, shape and material to get the best possible design of the chassis. Static analysis is carried out
for both basic and modified designs to determine the high stress regions, maximum displacement, and normal stress at critical
positions of the chassis. Normal modal analysis for base model is carried out to find the first natural frequency. Normal modal
analysis is carried out for all modified designs to improve the first natural frequency of the chassis in order to avoid the resonance.
The whole challenging task, starting with pre processing, analysis and post processing is completed using Altair’s HyperMesh,
Abaqus and HyperView FE package.
Key Words: Trailer arm chassis, Static analysis and Modal analysis.
--------------------------------------------------------------------***----------------------------------------------------------------------
1. INTRODUCTION
Ƭransportation industries place a major role in the economy
of modern industrialized and developed countries. Ƭhe total
and relative volume of goods carried on trailers is
dramatically increasing. Ƭo support the vehicle a structural
unit is used known as chassis. The chassis safely supports
the weight of the vehicle components and transmit the loads
that result from longitudinal, lateral and vertical acceleration
that are experienced in a racing environment without failure
[3]. Chassis is an Frẹnch term and was initially used to
denote the frame parts or basic structure of the vehicle. A
vehicle without body is called chassis. Ƭhe chassis provides
the structure which connects the front and rear portion of the
vehicle without excessive deflection. After the invention of
automobiles a little attention was paid to the design of
chassis frame. The other components of the chassis like
gears and axles were of much importance. The first chassis
was made up of wood and ash being the materials used. The
cross members were forged iron and joined on the frame [2].
The difficulty has been increased when accidents tends to
occur more with other failures which were directly related
with the poor design of the chassis. Then the automobile
engineers thought of building the chassis frame with more
strength and less in weight. Now-a-days the well designed
chassis frame has increased the tendency to take the more
loads and holding the parts with the proper alignment. The
number of mountings on the chassis has increased to greater
degree which will relieve the stress to a greater extent when
the vehicle moves on the rough roads.
2. TRAILER ARM CHASSIS
A good chassis is the one which has the optimum stiffness
requirements in order to allow a safe drive under the most
adverse road and traffic conditions. Ƭhe static and modal
analysis techniques are significantly used for automotive
chassis structure design. Static analysis is carried out to find
the characteristics of chassis at static condition so that
stresses can be found out at the initial loading condition of
the chassis. Ƭhe dynamic characteristics of the chassis are
studied in order to find out the natural frequency to avoid
the resonance which occurs during the working condition of
chassis. Resonance occurs when the excitation frequency of
the chassis becomes equal to the natural frequency [1].
Therefore investigation on dynamic characteristics is carried
out to control unpleasant noise and vibration by designing a
chassis whose excitation frequency is well within the natural
frequency. Ƭhe type of chassis used in this project is a trailer
arm chassis. Ƭhis project work is mainly focused on design
and optimization of trailer arm chassis. Ƭhe chassis is
designed by using modeling software and is analysed by
using finite element analysis. Ƭhe chassis is designed by
varying thickness, shape and material.
2. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 123
And some other main objectives of work are,
Ƭo study the design of existing trailer arm chassis.
Ƭo generate the geometric modeling of existing chassis.
Ƭo generate the finite element modeling of the chassis.
Ƭo carry out all necessary checks on the model.
Static and modal analysis is performed on chassis to
calculate the stress, displacement, and natural
frequencies.
Recommendation of best suitable Design for Trailer
Arm chassis.
It is vital that the correct material and section type is used to
ensure that each part will be able to endure the load it will
experience; hence proper material grade selection should be
done to improve the life of the component.
3. METHODOLOGY OF THE WORK
The procedure followed in order to do the analysis work is
done by initially taking the three trailer arm chassis models.
Modal analysis is carried out for the three designs
considered by meshing the chassis and applying the
boundary conditions, where the meshing and analysis is
done in ALTAIR-HYPERWORKS V12. Static analysis is
done by taking the best model along with the whole
assembly and a static load is applied over the structure.
Different loading conditions and different materials are
considered for the analysis which are done by ABAQUS
software as a tool. The obtained results are viewed in
HYPERVIEW and graphs are plotted for each of the results
obtained.
Figure 1: Flow chart of Chassis analysis
4. MATERIAL PROPERTIES AND DESIGN OF
CHASSIS
In this topic concepts of trailer arm chassis are studied in
order to set the boundary condition to obtain better accuracy
in the results after analysis, also selection of materials and
their properties are discussed in brief.
4.1 Model selection and study
Three trailer arm chassis models are taken for the analysis
study which is represented in the following figures.
Figure 2: Trailer arm chassis model 1
The above figure shows the model1 taken for the analysis
work.
Figure 3: Trailer arm chassis model 2
Figure 4: Trailer arm chassis model 3
The chassis models shown in the above figures are
considered for the modal analysis in order to find the natural
frequencies and the mode shapes, among which the model
with the highest natural frequency are subjected to static
load with different loading conditions and different material
considerations.
3. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 124
4.2 Material
It is important to choose the correct material and section
type is used to ensure that each part will be able to endure
the load it will experience. The type of material to be used
for chassis depends on its application requirements and
operating conditions. The material is decided on the basis of
its rigidity, strength, cost, durability and reliability. The
material selected should also be easy to fabricate.
Fabrication plays an important role in material selection. As
strength of material increases, cost of fabrication increases.
Steel started to be used as material for decoration in
automobile. However, in recent years, it is mostly used as
material for the chassis. It is because those stainless steels
with good performance of high temperature characteristics
and high corrosion resistance[4]. Material used for structural
analysis of Chassis is listed in Table1.The isotropic material
properties used in a FEA analysis are as follows.
Table 1: Mechanical properties of materials used in Chassis
analysis
Sl.
No
Mechanical
property
Steel Cast Iron
Wrought
Iron
1
Young's
Modulus
2.10x105
N/mm2
1.20 x105
N/mm2
1.90 x105
N/mm2
2
Poisson's
Ratio
0.30 0.28 0.30
3 Density
7.89x10-
9
Ton/mm3
7.20x10-
9
Ton/mm3
7.75x10-
9
Ton/mm3
4 Yield Stress
370
N/mm2
130
N/mm2 210 N/mm2
4.3 The boundary conditions is set for the models as
shown in the figure 5,6,7.
The proper specification of boundary conditions is just as
important for dynamic analysis as it is for static analysis.
The improper specification of the boundary conditions leads
to incorrect answers. One such improper specification of
boundary conditions is forgetting to fully constrain the
structure [5]. Unlike static analysis, for which an under
constrained model does not run, an under-constrained model
does run in dynamic analysis. We should perform a Normal
mode analysis first and verify that there are no unwanted
rigid-body modes.
The boundary condition is set for the model1as shown in
fig.5, which indicates that it is in the fixed condition since it
the fixed part in the whole assembly of the part.
Figure 5: Boundary condition applied on chassis model 1
Figure 6: Boundary condition applied on model 2
Figure 7: Boundary condition applied on model 3
Once the boundary conditions are applied on the models, the
natural frequencies and mode shapes are found which are
listed in the below tables.
Table 2: Mode Shapes on Different Natural Frequencies of
chassis model 1
SL.
No
Modes
shapes
Description
Natural frequency
(Hz)
1 1st
Mode Bending mode 17.96
2 2nd
Mode Linear mode 20.41
3 3rd
Mode Linear mode 44.38
4 4th
Mode Bending mode 53.43
The table 2 shows the different values of nautral frequencies
and mode shapes obtained for model 1.
Table 3: Mode Shapes on Different Natural Frequencies of
chassis model 2
SL. No
Modes
shapes
Description
Natural
frequency
(Hz)
1 1st
Mode Bending mode 19.66
2 2nd
Mode Linear mode 21.51
3 3rd
Mode Linear mode 44.10
4 4th
Mode Bending mode 51.85
The table 3 shows the different values of nautral frequencies
and mode shapes obtained for model 2.
4. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
_______________________________________________________________________________________
Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 125
Table 4: Mode Shapes on Different Natural Frequencies of
chassis model 3
SL. No
Modes
shapes
Description
Natural
frequency
(Hz)
1 1st
Mode Bending mode 18.19
2 2nd
Mode Linear mode 20.76
3 3rd
Mode Linear mode 44.64
4 4th
Mode Bending mode 48.02
The table 4 shows the different values of nautral frequencies
and mode shapes obtained for model 3.
Table 5: Natural Frequency of chassis for Different
materials
Sl no Material First Natural
Frequency in Hz
1 Steel 19.66
2 Cast Iron 18.55
3 Wrought Iron 19.64
The table 5 shows the values of nautral frequencies
For different materials.
Figure 7: Nautral frequencies For different materials
By comparing design iterations of normal mode analysis the
first fundamental natural frequency of chassis design 2 is
higher . When compared to masses of the chassis, the design
2 gives the optimum mass and the natural frequency for
design 2 satisfies the design standards so design 2 is
considered further analysis such as static analysis.
4.4 Static Analysis
Static analysis is employed to know the maximum stress,
displacement developed on the chassis and .The name Static
indicates that the load on the chassis is constant, and load is
not varying with respect to time [6]. Before analysis the
structure is meshed for finite meshing in HYPERMESH
software. Static analysis is performed with 5g, 5g,-10g loads
applied on the chassis in x,y,z directions respectively. The
boundary conditions are applied and all degrees of freedom
(DOF) on the chassis are constrained. The displacements of
chassis for different materials are separately obtained and
compared at different loading conditions. The materials
considered for the analysis in order to fond the stress and
displacement at different loading condition are Steel, Cast
iron and Wrought iron.
The obtained results are tabulated for stress, displacement
for chassis with different materials are as listed below.
Table6: Stress and displacement on chassis for different
materials
Sl no Material Stress in
Mpa
Displacement
in mm
1 Steel 234 6.74
2 Cast Iron 246 7.52
3 Wrought Iron 243.40 6.76
The stress and the displacement values obtained for Steel is
comparatively very low to that of the cast iron and Wrought
iron material.
Material wise comparison also done to choose best material
and to optimize the design. Following figure shows material
wise comparison.
Figure 8: Stress and displacement for different materials
The above graph shows the material wise comparision for
Steel, Cast iron and Wrought iron and also shows the Stress
and displacement vs materials, Where the Stress and
displacement for Steel is lesser.
5. RESULTS AND DISCUSSIONS
The natural frequency obtained for model 2 is 17.96Hz and
for the model2 is 19.66 Hz for model 3 is 18.19Hz of which
both the 1st
modes are bending modes, hence it can
withstand further conditions. The natural frequency with
higher values is chosen because it has less mass compared to
model1 and model 3.
Further Static analysis was carried out to find stresses and
displacements at 5g, 5g,-10g loading conditions for the
materials Steel, Cast iron, Wrought iron. In these obtained
5. IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 04 Issue: 09 | September-2015, Available @ http://www.ijret.org 126
values when we refer to graphs or table, we can clearly see
that Steel has less stress and displacement values as
compared to Cast iron and Wrought iron. Steel can
withstand maximum loads with less displacement and stress.
6. CONCLUSION
In this study work optimization study of Trailer arm chassis
of is carried out to improve the performance on 5g, 5g,-10g
loading condition has been done by considering different
materials like Steel, Cast iron, Wrought iron. Initially three
chassis designs are selected based on the vehicle
requirement and considered the same designs for the
optimization process to reduce weight of the models. For
meshing of the models HYPERMESH software and for the
analysis ABAQUS was used. Analysis of models was done
at 5g, 5g,-10g loading conditions for different materials by
setting appropriate boundary conditions. From the analysis
results it has been concluded that Steel is the best material to
manufacture the selected Chassis design because it can
withstand maximum loads with less displacement and stress.
7. REFERENCES
[1]. Mehdi Mahmodi –K. “Stress and Dynamic analysis of
optimized trailer chassis” Original Scientific Paper, pp.
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[3]. Haval Kumar Asker, Thaker Salin Dawood , Arkan
Fawzi Zaid. “Stress analysis of standard truck chassis
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[4]. Shiva Kumar. “Fatigue life estimation of chassis frame
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[5]. Hemant B. patil. “Stress analysis of automotive chassis
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[6]. Monika S. Agrawal. “Finite element analysis of truck
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