The document describes the design of a bariatric walker. It is intended to support obese and elderly users weighing up to 200kg. The design includes adjustable telescoping legs, lockable hinges, ergonomic handles, and a spring-loaded door. Engineering analysis was performed to analyze buckling, bending, and fall protection. Risks of falling and entering/exiting were considered. Future work includes prototyping and testing to validate the design.
The document describes the structural optimization of an SAE Baja car frame through analysis of frontal, side, roll-over, torsional, and combined impacts. Frontal impact analysis was performed first due to its severity. The frame was loaded with a 33.33 kN force and optimized to minimize mass. Key members were found with stresses over 230 MPa and their inner and outer radii were parameterized for optimization. The optimized frontal design was then used for further analyses and optimizations of side impact, roll-over, modal frequencies, torsional loading, and a system integration study. Mass convergence and stress plots show the optimization process.
The document summarizes the 2015 SAE Baja frame designed by Jacob Gansert for the University of Tennessee-Martin Baja team. The frame was designed to maximize the team's chances of winning the competition based on objectives like speed, durability, mobility, ergonomics, cost, and serviceability. An iterative design process was used, beginning with choices of tubing material, dimensions, and CAD modeling to ensure driver safety requirements were met. Tradeoffs between objectives like strength, weight, cost, and manufacturability were considered throughout the design.
Detailed design report on design of upright and hubZubair Ahmed
The document describes the design process for an upright component in an automobile suspension system. It discusses 14 design parameters that were considered. Several design concepts and models were explored before settling on a final design (Design 4). The key points of the final design are that it is CNC milled from aluminum alloy 6351 T-6, weighs 760 grams, and addresses the weaknesses identified in previous designs. Loading scenarios analyzed include steering effort, braking forces, remote bump forces, and cornering forces. Finite element analysis was used to evaluate stresses and predict fatigue life under the different loading conditions.
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
Mcgill dealer in india vardhman bearings www.vardhmanbearings.comvardhmanbearings2015
This document provides specifications for McGill inch cam follower bearings. It includes details on various product series, size ranges, materials, mounting styles, design characteristics, and features. The document discusses cylindrical, crowned, V-groove, and flanged mounting styles. It also provides information on options like corrosion resistance, lubrication holes, seals, and custom capabilities. Part numbers, dimensions, load ratings and other technical specifications are given for various standard cam follower bearing models.
This document provides information about McGill's Metric CAMROL bearings. CAMROL is McGill's line of roller bearing cam followers, originally invented over 60 years ago. McGill offers a complete series of Metric CAMROL bearings to meet global industry needs. The bearings are available in stud or yoke type configurations and can include needle rollers or cylindrical rollers. All bearings feature lubrication seals and fittings to reduce friction and extend bearing life.
Design, Analysis and Optimization of Anti-Roll BarIJERA Editor
Vehicle anti-roll bar is part of an automobile suspension system which limits body roll angle. This U-shaped
metal bar connects opposite wheels together through short lever arms and is clamped to the vehicle chassis with
rubber bushes. Its function is to reduce body roll while cornering, also while travelling on uneven road which
enhances safety and comfort during driving. Design changes of anti-roll bars are quite common at various steps
of vehicle production and a design analysis must be performed for each change. So Finite Element Analysis
(FEA) can be effectively used in design analysis of anti-roll bars. The finite element analysis is performed by
ANSYS. This paper includes pre-processing, analysis, post processing, and analyzing the FEA results by using
APDL (Ansys Parametric Design Language). The effects of anti-roll bar design parameters on final anti-roll bar
properties are also evaluated by performing sample analyses with the FEA program developed in this project.
5)structural performance analysis of formula sae carAnkit Singh
This document summarizes the structural performance analysis of a Formula SAE race car chassis designed by engineering students. It describes:
1) How the chassis was modeled and analyzed using finite element analysis to study stress distributions and deformations under various static, dynamic, and frequency loads.
2) How load calculations were performed to estimate forces from acceleration, braking, and cornering. Loads from driver and components were also estimated.
3) Material selection for the chassis, with steel being chosen for its availability, cost, and mechanical properties like strength and stiffness.
4) Development process including modifying an existing 3D chassis model using CAD software while ensuring fit with an anthropometric driver model.
The document describes the structural optimization of an SAE Baja car frame through analysis of frontal, side, roll-over, torsional, and combined impacts. Frontal impact analysis was performed first due to its severity. The frame was loaded with a 33.33 kN force and optimized to minimize mass. Key members were found with stresses over 230 MPa and their inner and outer radii were parameterized for optimization. The optimized frontal design was then used for further analyses and optimizations of side impact, roll-over, modal frequencies, torsional loading, and a system integration study. Mass convergence and stress plots show the optimization process.
The document summarizes the 2015 SAE Baja frame designed by Jacob Gansert for the University of Tennessee-Martin Baja team. The frame was designed to maximize the team's chances of winning the competition based on objectives like speed, durability, mobility, ergonomics, cost, and serviceability. An iterative design process was used, beginning with choices of tubing material, dimensions, and CAD modeling to ensure driver safety requirements were met. Tradeoffs between objectives like strength, weight, cost, and manufacturability were considered throughout the design.
Detailed design report on design of upright and hubZubair Ahmed
The document describes the design process for an upright component in an automobile suspension system. It discusses 14 design parameters that were considered. Several design concepts and models were explored before settling on a final design (Design 4). The key points of the final design are that it is CNC milled from aluminum alloy 6351 T-6, weighs 760 grams, and addresses the weaknesses identified in previous designs. Loading scenarios analyzed include steering effort, braking forces, remote bump forces, and cornering forces. Finite element analysis was used to evaluate stresses and predict fatigue life under the different loading conditions.
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
Mcgill dealer in india vardhman bearings www.vardhmanbearings.comvardhmanbearings2015
This document provides specifications for McGill inch cam follower bearings. It includes details on various product series, size ranges, materials, mounting styles, design characteristics, and features. The document discusses cylindrical, crowned, V-groove, and flanged mounting styles. It also provides information on options like corrosion resistance, lubrication holes, seals, and custom capabilities. Part numbers, dimensions, load ratings and other technical specifications are given for various standard cam follower bearing models.
This document provides information about McGill's Metric CAMROL bearings. CAMROL is McGill's line of roller bearing cam followers, originally invented over 60 years ago. McGill offers a complete series of Metric CAMROL bearings to meet global industry needs. The bearings are available in stud or yoke type configurations and can include needle rollers or cylindrical rollers. All bearings feature lubrication seals and fittings to reduce friction and extend bearing life.
Design, Analysis and Optimization of Anti-Roll BarIJERA Editor
Vehicle anti-roll bar is part of an automobile suspension system which limits body roll angle. This U-shaped
metal bar connects opposite wheels together through short lever arms and is clamped to the vehicle chassis with
rubber bushes. Its function is to reduce body roll while cornering, also while travelling on uneven road which
enhances safety and comfort during driving. Design changes of anti-roll bars are quite common at various steps
of vehicle production and a design analysis must be performed for each change. So Finite Element Analysis
(FEA) can be effectively used in design analysis of anti-roll bars. The finite element analysis is performed by
ANSYS. This paper includes pre-processing, analysis, post processing, and analyzing the FEA results by using
APDL (Ansys Parametric Design Language). The effects of anti-roll bar design parameters on final anti-roll bar
properties are also evaluated by performing sample analyses with the FEA program developed in this project.
5)structural performance analysis of formula sae carAnkit Singh
This document summarizes the structural performance analysis of a Formula SAE race car chassis designed by engineering students. It describes:
1) How the chassis was modeled and analyzed using finite element analysis to study stress distributions and deformations under various static, dynamic, and frequency loads.
2) How load calculations were performed to estimate forces from acceleration, braking, and cornering. Loads from driver and components were also estimated.
3) Material selection for the chassis, with steel being chosen for its availability, cost, and mechanical properties like strength and stiffness.
4) Development process including modifying an existing 3D chassis model using CAD software while ensuring fit with an anthropometric driver model.
CADmantra Technologies Pvt. Ltd. is one of the best Cad training company in northern zone in India . which are provided many types of courses in cad field i.e AUTOCAD,SOLIDWORK,CATIA,CRE-O,Uniraphics-NX, CNC, REVIT, STAAD.Pro. And many courses
Contact: www.cadmantra.com
www.cadmantra.blogspot.com
www.cadmantra.wix.com
ASK Automotive is a leading manufacturer of friction products for two-wheelers in India founded in 1989. Over two decades, it has grown from a small manufacturer to a major supplier of brake assemblies, brake shoes, and other automotive parts to OEMs in India. The company aims to make its products the first choice of users. It manufactures brake shoes and other friction products through a process that includes melting aluminum alloy, die casting, trimming, lapping, inspection, and packaging. Quality is ensured through certifications and a JIT production system with zero PPM defects.
The document summarizes the process of calculating the forces acting on an upright and suspension links of a Formula Student race car. It describes obtaining parameters like acceleration during maneuvers, tire friction coefficients, and developing free body diagrams to calculate longitudinal braking forces, lateral cornering forces, and combined braking/cornering forces on the upright. A matrix method is used to determine the axial forces in each wishbone, toe/pushrod link by distributing the tire contact forces. Stress analysis is performed on the links to check for safety factors during design.
The document discusses various types of CASNUB bogies used in Indian railways. It provides details of the components and features of CASNUB -22W, -22W(M), -22W(Retrofitted), -22NL, -22NLB, -22NLM, and -22HS bogies. The bogies comprise side frames, a bolster, springs, a centre pivot arrangement, friction plates, and other components. The document also outlines inspection and maintenance criteria for key bogie components like the adapter and side frames.
Ride comfort and handling of off-road vehicles can be significantly improved by replacing the normal passive dampers in the vehicle suspension system with controllable Semi-active dampers. The semi-active damping control system with variable shock absorber is widely used to improve the vehicle dynamic characteristics such as ride comfort and driving safety. To achieve better vehicle performance, the shock absorber with wide range of damping force variation develops. This is practically achieved by external valve control by manually. The performance of the semi-active shock absorber is investigated by single degree freedom (quarter vehicle model) test rig.
The Baja SAE Racing team at the University of Colorado Boulder acknowledges sponsors who contributed to the team. The team was established in 2015 to design, build, and compete off-road vehicles. Due to challenges faced by new teams, designs were validated through computer simulation and track testing. Some components were revised during construction for fit, weight, and comfort. The team will compete against 100 other international teams in events like marketing, cost design, races, and hill climbs in May 2016.
IRJET- Design and Analysis of Alloy Wheel for Multi-Purpose VehicleIRJET Journal
This document summarizes a study on the design and analysis of an alloy wheel for a multi-purpose vehicle (MUV). Magnesium AZ80 material was selected for the alloy wheel due to its superior mechanical properties, durability, and light weight. A 18-inch alloy wheel design was analyzed using ABAQUS software for cornering, radial, and impact tests. The radial test analysis showed low stress and displacement within acceptable limits. However, the cornering test analysis found high stresses over twice the material's ultimate limit, indicating potential failure. The impact test analysis found maximum stresses within acceptable limits. The study concluded the design was suitable for radial and impact tests but required further investigation to avoid failure under cornering loads.
This document summarizes a research paper that designed and analyzed a two-wheeler suspension system for variable load conditions. It describes how shock absorbers work to dampen vibrations and improve ride quality. The researchers modeled a shock absorber in Pro/Engineer software and performed structural and modal analyses under different loads and with varying spring materials (spring steel and beryllium copper). The analyses validated the design's strength and determined displacements at different frequencies. Spring steel had lower stresses compared to beryllium copper. A modified design with a smaller spring diameter also had lower stresses and displacements, validating it as a safer design.
The document discusses various types of bogies and suspension systems used in Indian railways. It provides details of the CASNUB bogie, including its general description and features. The CASNUB bogie assembly consists of various components like side frames, bolster, spring plank, wheels, axles, axle boxes, and center pivot arrangement. Construction and maintenance details are provided for each of these components. Wear limits and tolerances for replacement are also specified.
DESIGN AND ANALYSIS OF SIDE FORCE SPRING IN MCPHERSON STRUTtulasiva
To reduce the magnitude of lateral forces generated by cornering of vehicle on dampers due to buckling action which is caused by packaging issues occurred during the assembly of McPherson strut suspension system in passenger vehicle.
In order to achieve our desired results, the piercing points axis must reach as close with line of forces (Kingpin axis).
Design and Analysis of Side Force Spring in McPherson Strut - PHASE 1tulasiva
To reduce the magnitude of lateral forces generated by cornering of vehicle on dampers due to buckling action which is caused by packaging issues occurred during the assembly of McPherson strut suspension system in passenger vehicle.
In order to achieve our desired results, the piercing points axis must reach as close with line of forces (Kingpin axis).
Failure Analysis of Expansion Joints (Bellows)IRJET Journal
This document describes a failure analysis of expansion joints (bellows) used in ductwork. Expansion joints are designed to absorb thermal expansion and contraction of materials as well as vibrations. The failures of bellows in a particular duct system are investigated through finite element analysis and analytical calculations. A 3mm thick stainless steel bellow design failed, so modifications including increasing the thickness to 6mm and changing the material were analyzed. The stresses in the modified 6mm thick bellow design were found to be lower than in the original 3mm design based on FEA and analytical calculations. The objectives, scope, analytical calculations, FEA methodology and results are summarized. The conclusions determined the stresses developed are highest at the root and tangent lengths of the
Stress and fatigue analysis of landing gear axle of a trainer aircrafteSAT Journals
Abstract The undercarriage or landing gear of an aircraft is the structure that supports an aircraft on the ground and allows it to taxi, takeoff and land. Among the various parts of landing gear, axle is the most critical component where the loads (landing and ground loads) act on the axle first, then transferred to the structure. In this study stress and fatigue analysis of the axle is performed to meet the strength and life requirements. The modeling of the axle is done using UniGraphics (UG) software. Stress analysis is carried out using MSC Patran (pre-processing and post-processing)/Nastran (solver) for different landing loads (spin up, spring back, maximum vertical and drift) and ground handling loads (braking, taxing and turning). Stress analysis was carried out by both classical and FEM approaches and by comparing the results it was obvious that they were in correlation with one another. Fatigue analysis was also carried out for the axle using landing spectrum and ground handling spectrum to estimate the fatigue life. By the iteration process, the requirement of 10000 landings was satisfied. Keywords: Static, Fatigue, Axle, Fatigue life, UniGraphics, MSC Patran, MSC Nastran
This document summarizes simulation work done to optimize the design of a power liftgate subsystem for an SUV. The optimization aimed to reduce weight while meeting structural requirements. Topology optimization of the inner panel identified critical areas for reinforcement. Gauge optimization of reinforcements and plates reduced weight by 1.5 kg compared to the baseline, while still satisfying requirements for both manual and power liftgate loading conditions. The optimized design merged two reinforcements into one component, saving on manufacturing costs.
Fatigue fracture of a main landing gear swinging leverin a civil aircraftPramodKawade
The left main landing gear of an aircraft collapsed during takeoff due to fatigue fracture of the swinging lever after 26,139 flights. Fractography analysis revealed the fracture initiated from the surface of the lever near the most stressed region as identified by FEA stress analysis. Microstructural examination found an abnormal amount of silicon at the origin site which led to stress concentrations. AFGROW fatigue analysis using the FEA stress data predicted a fatigue life of 20,000 cycles, consistent with the actual life, indicating the failure occurred due to exceeding the fatigue life of the lever.
This document summarizes the development of a suspension system for a Formula Student race car designed by a group of students at Plymouth University. It describes the initial concept of a double wishbone suspension and how aerodynamic limitations led to changes. Calculations, CAD modeling, FEA analysis, and MATLAB simulations were used in the design process. Several iterations optimized aspects of the suspension such as material selection, component geometry, and manufacturing methods. A final cost analysis found the designed suspension system would meet requirements and be viable for the ongoing student race car project.
Workstation cranes can be manufactured to customer specifications for lifting loads up to 4000 lbs. They are available as free standing or ceiling mounted models with bridge spans up to 30 feet. The document provides information on the features and components of MET-TRACK brand workstation cranes, which are designed for ease of movement and reduced operator fatigue. Various configuration and mounting options are described.
How do we measure the mobility. One simple answer of this is my gait assessment. Please find a tool that I found online and we were using it at the foundation.
This document describes a foldable walker designed for disabled or elderly users. The key features of the walker include dual-release width and height adjustment, sturdy aluminum construction that is lightweight, a weight capacity of up to 400 lbs, and swivel casters on the front legs for easy maneuverability. The walker can be adjusted in width from 13-25 inches and height from 28-44 inches, and folds for easy storage.
The document summarizes the design of a bariatric walker by Team Bass. It describes the problem of assisting obese or elderly patients with walking. The final design of the collapsible walker includes an aluminum frame, ergonomic handles, braking mechanism, ability to carry medical supplies, and accommodates weights up to 400 pounds. Validation testing found the design met requirements for adjustability, compactness, braking and weight capacity.
The document summarizes the designer's portfolio, highlighting projects that showcase their strengths in CAD modeling, rendering, modelmaking, and maintaining a clear design concept. Key projects include an ergonomic classical guitar, energy efficient floor lamp, and avalanche survival jacket incorporating breathing and location systems.
CADmantra Technologies Pvt. Ltd. is one of the best Cad training company in northern zone in India . which are provided many types of courses in cad field i.e AUTOCAD,SOLIDWORK,CATIA,CRE-O,Uniraphics-NX, CNC, REVIT, STAAD.Pro. And many courses
Contact: www.cadmantra.com
www.cadmantra.blogspot.com
www.cadmantra.wix.com
ASK Automotive is a leading manufacturer of friction products for two-wheelers in India founded in 1989. Over two decades, it has grown from a small manufacturer to a major supplier of brake assemblies, brake shoes, and other automotive parts to OEMs in India. The company aims to make its products the first choice of users. It manufactures brake shoes and other friction products through a process that includes melting aluminum alloy, die casting, trimming, lapping, inspection, and packaging. Quality is ensured through certifications and a JIT production system with zero PPM defects.
The document summarizes the process of calculating the forces acting on an upright and suspension links of a Formula Student race car. It describes obtaining parameters like acceleration during maneuvers, tire friction coefficients, and developing free body diagrams to calculate longitudinal braking forces, lateral cornering forces, and combined braking/cornering forces on the upright. A matrix method is used to determine the axial forces in each wishbone, toe/pushrod link by distributing the tire contact forces. Stress analysis is performed on the links to check for safety factors during design.
The document discusses various types of CASNUB bogies used in Indian railways. It provides details of the components and features of CASNUB -22W, -22W(M), -22W(Retrofitted), -22NL, -22NLB, -22NLM, and -22HS bogies. The bogies comprise side frames, a bolster, springs, a centre pivot arrangement, friction plates, and other components. The document also outlines inspection and maintenance criteria for key bogie components like the adapter and side frames.
Ride comfort and handling of off-road vehicles can be significantly improved by replacing the normal passive dampers in the vehicle suspension system with controllable Semi-active dampers. The semi-active damping control system with variable shock absorber is widely used to improve the vehicle dynamic characteristics such as ride comfort and driving safety. To achieve better vehicle performance, the shock absorber with wide range of damping force variation develops. This is practically achieved by external valve control by manually. The performance of the semi-active shock absorber is investigated by single degree freedom (quarter vehicle model) test rig.
The Baja SAE Racing team at the University of Colorado Boulder acknowledges sponsors who contributed to the team. The team was established in 2015 to design, build, and compete off-road vehicles. Due to challenges faced by new teams, designs were validated through computer simulation and track testing. Some components were revised during construction for fit, weight, and comfort. The team will compete against 100 other international teams in events like marketing, cost design, races, and hill climbs in May 2016.
IRJET- Design and Analysis of Alloy Wheel for Multi-Purpose VehicleIRJET Journal
This document summarizes a study on the design and analysis of an alloy wheel for a multi-purpose vehicle (MUV). Magnesium AZ80 material was selected for the alloy wheel due to its superior mechanical properties, durability, and light weight. A 18-inch alloy wheel design was analyzed using ABAQUS software for cornering, radial, and impact tests. The radial test analysis showed low stress and displacement within acceptable limits. However, the cornering test analysis found high stresses over twice the material's ultimate limit, indicating potential failure. The impact test analysis found maximum stresses within acceptable limits. The study concluded the design was suitable for radial and impact tests but required further investigation to avoid failure under cornering loads.
This document summarizes a research paper that designed and analyzed a two-wheeler suspension system for variable load conditions. It describes how shock absorbers work to dampen vibrations and improve ride quality. The researchers modeled a shock absorber in Pro/Engineer software and performed structural and modal analyses under different loads and with varying spring materials (spring steel and beryllium copper). The analyses validated the design's strength and determined displacements at different frequencies. Spring steel had lower stresses compared to beryllium copper. A modified design with a smaller spring diameter also had lower stresses and displacements, validating it as a safer design.
The document discusses various types of bogies and suspension systems used in Indian railways. It provides details of the CASNUB bogie, including its general description and features. The CASNUB bogie assembly consists of various components like side frames, bolster, spring plank, wheels, axles, axle boxes, and center pivot arrangement. Construction and maintenance details are provided for each of these components. Wear limits and tolerances for replacement are also specified.
DESIGN AND ANALYSIS OF SIDE FORCE SPRING IN MCPHERSON STRUTtulasiva
To reduce the magnitude of lateral forces generated by cornering of vehicle on dampers due to buckling action which is caused by packaging issues occurred during the assembly of McPherson strut suspension system in passenger vehicle.
In order to achieve our desired results, the piercing points axis must reach as close with line of forces (Kingpin axis).
Design and Analysis of Side Force Spring in McPherson Strut - PHASE 1tulasiva
To reduce the magnitude of lateral forces generated by cornering of vehicle on dampers due to buckling action which is caused by packaging issues occurred during the assembly of McPherson strut suspension system in passenger vehicle.
In order to achieve our desired results, the piercing points axis must reach as close with line of forces (Kingpin axis).
Failure Analysis of Expansion Joints (Bellows)IRJET Journal
This document describes a failure analysis of expansion joints (bellows) used in ductwork. Expansion joints are designed to absorb thermal expansion and contraction of materials as well as vibrations. The failures of bellows in a particular duct system are investigated through finite element analysis and analytical calculations. A 3mm thick stainless steel bellow design failed, so modifications including increasing the thickness to 6mm and changing the material were analyzed. The stresses in the modified 6mm thick bellow design were found to be lower than in the original 3mm design based on FEA and analytical calculations. The objectives, scope, analytical calculations, FEA methodology and results are summarized. The conclusions determined the stresses developed are highest at the root and tangent lengths of the
Stress and fatigue analysis of landing gear axle of a trainer aircrafteSAT Journals
Abstract The undercarriage or landing gear of an aircraft is the structure that supports an aircraft on the ground and allows it to taxi, takeoff and land. Among the various parts of landing gear, axle is the most critical component where the loads (landing and ground loads) act on the axle first, then transferred to the structure. In this study stress and fatigue analysis of the axle is performed to meet the strength and life requirements. The modeling of the axle is done using UniGraphics (UG) software. Stress analysis is carried out using MSC Patran (pre-processing and post-processing)/Nastran (solver) for different landing loads (spin up, spring back, maximum vertical and drift) and ground handling loads (braking, taxing and turning). Stress analysis was carried out by both classical and FEM approaches and by comparing the results it was obvious that they were in correlation with one another. Fatigue analysis was also carried out for the axle using landing spectrum and ground handling spectrum to estimate the fatigue life. By the iteration process, the requirement of 10000 landings was satisfied. Keywords: Static, Fatigue, Axle, Fatigue life, UniGraphics, MSC Patran, MSC Nastran
This document summarizes simulation work done to optimize the design of a power liftgate subsystem for an SUV. The optimization aimed to reduce weight while meeting structural requirements. Topology optimization of the inner panel identified critical areas for reinforcement. Gauge optimization of reinforcements and plates reduced weight by 1.5 kg compared to the baseline, while still satisfying requirements for both manual and power liftgate loading conditions. The optimized design merged two reinforcements into one component, saving on manufacturing costs.
Fatigue fracture of a main landing gear swinging leverin a civil aircraftPramodKawade
The left main landing gear of an aircraft collapsed during takeoff due to fatigue fracture of the swinging lever after 26,139 flights. Fractography analysis revealed the fracture initiated from the surface of the lever near the most stressed region as identified by FEA stress analysis. Microstructural examination found an abnormal amount of silicon at the origin site which led to stress concentrations. AFGROW fatigue analysis using the FEA stress data predicted a fatigue life of 20,000 cycles, consistent with the actual life, indicating the failure occurred due to exceeding the fatigue life of the lever.
This document summarizes the development of a suspension system for a Formula Student race car designed by a group of students at Plymouth University. It describes the initial concept of a double wishbone suspension and how aerodynamic limitations led to changes. Calculations, CAD modeling, FEA analysis, and MATLAB simulations were used in the design process. Several iterations optimized aspects of the suspension such as material selection, component geometry, and manufacturing methods. A final cost analysis found the designed suspension system would meet requirements and be viable for the ongoing student race car project.
Workstation cranes can be manufactured to customer specifications for lifting loads up to 4000 lbs. They are available as free standing or ceiling mounted models with bridge spans up to 30 feet. The document provides information on the features and components of MET-TRACK brand workstation cranes, which are designed for ease of movement and reduced operator fatigue. Various configuration and mounting options are described.
How do we measure the mobility. One simple answer of this is my gait assessment. Please find a tool that I found online and we were using it at the foundation.
This document describes a foldable walker designed for disabled or elderly users. The key features of the walker include dual-release width and height adjustment, sturdy aluminum construction that is lightweight, a weight capacity of up to 400 lbs, and swivel casters on the front legs for easy maneuverability. The walker can be adjusted in width from 13-25 inches and height from 28-44 inches, and folds for easy storage.
The document summarizes the design of a bariatric walker by Team Bass. It describes the problem of assisting obese or elderly patients with walking. The final design of the collapsible walker includes an aluminum frame, ergonomic handles, braking mechanism, ability to carry medical supplies, and accommodates weights up to 400 pounds. Validation testing found the design met requirements for adjustability, compactness, braking and weight capacity.
The document summarizes the designer's portfolio, highlighting projects that showcase their strengths in CAD modeling, rendering, modelmaking, and maintaining a clear design concept. Key projects include an ergonomic classical guitar, energy efficient floor lamp, and avalanche survival jacket incorporating breathing and location systems.
The document describes a renewed mobility walker designed by a team to restore mobility for weak or elderly patients. The walker is height adjustable, easily collapsible for storage, and has "push-to-go" brakes that lock until the user is ready to walk. It also has an easy-entry door and rear entrance to allow users to enter from a sitting position, as well as a tarp for fall protection and telescoping legs to accommodate different heights.
This project details the design of a mobility walker tailored for adult dwarfs. The document outlines background research on existing mobility walker standards and anthropometric data on dwarf dimensions. Based on this, product design specifications were created. Initial CAD designs were developed and analyzed using FEA to evaluate stresses. The frame, wheels, and attachment designs were iteratively improved. The final design features an adjustable width and handle height mobility walker that meets standards, weighing 3.92kg with a 75kg load capacity.
This document provides instructions for non-weight bearing and partial weight bearing walking using crutches after lower limb fractures. It discusses the importance of early mobility to avoid complications of prolonged bed rest and promote healing. Complications from prolonged bed rest that affect various body systems are described. Detailed instructions are provided for different types of crutch walking including non-weight bearing, touch down weight bearing, and partial weight bearing. Measurements for proper crutch fitting and instructions for using crutches to climb and descend stairs are also outlined.
This document discusses various ambulation devices used to assist mobility for those with injuries or illnesses affecting their ability to walk. It describes parallel bars, walkers, crutches, canes, rollators and wheelchairs. For each device, it provides details on types, uses, advantages, disadvantages and proper fitting. It also explains non-weight bearing, partial weight bearing and swing through gaits used with crutches depending on a person's weight bearing status.
This document discusses various assistive devices for mobility including canes, walkers, and crutches. It describes the indications for their use, including structural deformities, injuries, muscle weakness, and balance issues. Each device is then defined and the proper techniques for their use are outlined, such as holding a cane, moving walkers forward, and different crutch gaits. Instructions are provided for measuring clients and teaching them how to walk correctly with each assistive device.
This document provides information about walking aids, orthotics, and gait patterns. It discusses various walking aids like frames, crutches, sticks, and their types. It also covers muscles involved in walking, factors for choosing walking aids, effects of walking aids, and height adjustment. Different gait patterns using walking aids like swing-to, swing-through, two-point and four-point gaits are explained. The document also discusses orthotics, their uses, types of foot orthotics and conditions they are used for like foot instability, claw toes, hammer toes and metatarsalgia.
The document discusses various mobility devices used to increase patient mobility. It describes devices from ancient times like canes made from tree branches to modern devices with aluminum, steel, plastic and rubber. Key devices discussed include canes, crutches, walkers, wheelchairs and scooting boards. The document provides details on appropriate usage, measurements, adjustments and positioning for different mobility devices.
This document discusses slips, trips, and falls. It defines a slip as occurring due to lack of traction, a trip as stumbling over an object, and a fall as losing balance. Falls can be at the same level or from elevation. Hazards include clutter, cords, spills, and unsafe footwear or work practices. The document provides tips for prevention such as paying attention, wearing proper footwear, keeping work areas tidy, and reporting hazards.
The document discusses several studies that analyzed biomechanics during stair climbing. SAMANTHA M. REID et al. (2007) found that alternate stair ambulation patterns like step-by-step lead-leg and trail-leg had higher knee loads than traditional step-over-step. M. Spanjaard et al. (2008) examined how increasing step-height and body mass influenced lower limb biomechanics during descent. Centro di Bioingegneria et al. (2002) investigated biomechanics at different stair inclinations. Additional studies analyzed kinematics of ascending and descending, differentiated patterns between young and older adults, and identified normal parameters in young individuals.
Report of design and development of multi purpose mechanical machine Jitendra Jha
This document describes a project report submitted by four students for their Bachelor of Engineering degree. It outlines the design, development and fabrication of a multi-purpose mechanical machine capable of drilling, cutting and shaping. The machine uses a Whitworth quick return mechanism powered by an electric motor to perform multiple operations simultaneously. It is a compact and low-cost machine that could be useful for industrial and domestic applications.
1) A group of students conducted a service learning project at North Point Mall to evaluate accessibility for the disabled, specifically those using walking aids like a wheeled walker.
2) They experimented with using a wheeled walker to understand the challenges. At the mall, they evaluated facilities like toilets, escalators, stairs, and lifts.
3) Their findings showed some areas for improvement like smaller lifts, non-accessible lift buttons, and lack of ramps in emergency exits. They proposed solutions like larger lifts, side panels, more lifts and travellators, and adding ramps.
This document discusses shaft design and layout. It covers selecting materials for shafts, including steel alloys. Geometric layout is discussed, including supporting axial loads and transmitting torque. Common shaft components like keys, pins, and set screws are described. Stress analysis equations for bending and torsion are provided. Estimating stress concentrations at features like shoulders is covered. The document contains many diagrams illustrating shaft configurations and components.
The document describes the initial design of a portable automotive hoist called the MI'TY LIFTS by two students, Tyrel Ruch and Mike Holzer. The hoist is intended to safely lift vehicles up to 6000 lbs to a maximum height of 48 inches for home mechanics. It will have a self-contained, portable design powered by an electric motor and lead screw mechanism.
The document describes the initial design of a portable automotive hoist called the MI'TY LIFTS by a group of students. It aims to create a hoist that can safely lift vehicles up to 6000 lbs to a maximum height of 48 inches for home mechanics. The design process included dividing design tasks among group members, considering different design options, and planning for future improvements.
This document summarizes the design and analysis of a coil spring for a two-wheeler shock absorber. It begins with an introduction to shock absorbers and their applications. It then describes the objectives of improving the design of the coil spring. The design calculations and modeling of the original coil spring are presented using Pro/Engineer software. An analysis of the original design is performed using ANSYS to determine stresses and deformation. A modified design is proposed with a larger coil diameter and analyzed showing improvements. The results are discussed and it is concluded that the modified design performs better with lower stresses.
The document describes the design and analysis of a leadscrew. It includes objectives to design the leadscrew based on applied forces and stresses, model the component in PRO/E, and analyze it in ANSYS. It covers terminology, applications, screw jack design, modeling steps in PRO/E, static structural analysis in ANSYS under different loads, and results for deformation, shear stress, strain, and normal stress. The analysis found the leadscrew does not fail under the applied forces and shows satisfactory results for reduced load values.
A team of biomedical engineers and a nurse are designing a cerebrospinal fluid collecting device to be used in under-resourced areas. They conducted usability testing including cadaver labs and tissue coring tests. The device features an introducer needle and whitacre needle for precise insertion. Additional testing analyzed fluid flow and device failure modes. Polypropylene was selected as the material due to its cost-effectiveness, durability, and ability to withstand stresses from insertion forces. Next steps include further mechanical validation and refining the needle design and drape accuracy.
IRJET- Design and Finite Element Analysis of Fabricated Panama Chock with 225...IRJET Journal
This document describes the design and finite element analysis of a fabricated Panama chock with a 225 metric ton capacity. The Panama chock was designed as an alternative to cast steel chocks by fabricating it from large diameter pipe bends and plates. A finite element model of the fabricated chock was created and analyzed under the design load of 675 metric tons to evaluate stresses and deflections. The analysis found a maximum deflection of 0.07 inches and maximum von Mises stress of 49.22 kilopounds per square inch, below the allowable limits. Therefore, the fabricated Panama chock design was determined to be suitable for safely handling the required 225 metric ton safe working load.
1) The document describes the engineering consulting and simulation skills of Econ Engineering, including CAE modeling, meshing, structural analysis, thermal analysis, and design capabilities using various CAD software.
2) Econ Engineering employs over 100 engineers with expertise in various simulation tools like ANSYS, LS-DYNA, ABAQUS, and CAD tools like SolidWorks, CATIA.
3) The company provides composite material analysis and design services for industries including automotive, railway, and aerospace, with experience in shell modeling, failure criteria assessment, and optimization of composite layups.
1. Karthik Kumar
Sebastian Schillo
Ben Baker
Jessica Thompson
Johannes Ruf
2. Introduction
Product Profile
◦ Problem Definition
◦ Concept: Product Functions and Features
◦ User Profile
Engineering Analysis
Walker Dimensioning and Parts
◦
Modeling
◦
Justification
◦
Risk Assessment
◦
Future Activities
◦ Gantt Chart
ME463 TEAM BASS DESIGN REVIEW 2
3. To design and construct a bariatric walker that
will aid or assist those weak of strength or
balance to walk in a safe and convenient
manner.
Provide support to obese or elderly
Carry additional medical items
Ensure safety
ME463 TEAM BASS DESIGN REVIEW 3
4. All aluminum
frame
Heavy-duty
lockable hinges
Ergonomic
handle bars
Reverse braking
mechanism
An in-built belt
Telescopic legs
Latched gate
entry
ME463 TEAM BASS DESIGN REVIEW 4
5. Primarily for elderly and obese users
Weight capacity of 200kg
◦ Tradeoff between weight and structure of the
walker
Requirements:
Relatively light
Strong brakes
No slip/slide when stationary
Increased protection against falling
Provisions to carry IV equipment
ME463 TEAM BASS DESIGN REVIEW 5
6. Introduction
Product Profile
◦ Problem Definition
◦ Concept: Product Functions and Features
◦ User Profile
Engineering Analysis
Walker Dimensioning and Parts
◦
Modeling
◦
Justification
◦
Risk Assessment
◦
Future Activities
◦ Gantt Chart
ME463 TEAM BASS DESIGN REVIEW 6
7. The primary features of the walker are:
◦ Adjustable height for convenience to users
◦ Foldable length for efficient storage
◦ Spring loaded door for entry and automatic closing
behind user
◦ Straps attaching to side walls, serving as fall
protection
◦ Default-locked hand brakes to ensure walker is
stationary while entering and until user ready for
motion
ME463 TEAM BASS DESIGN REVIEW 7
10. Connection of
square aluminum
pipe segments
◦ Inter-connections
and leg connections
via heavy duty
hinges, lockable at
0˚ and 180˚
ME463 TEAM BASS DESIGN REVIEW 10
11. Simple telescoping
design
◦ Pin connections set
height
◦ Larger top portion for
door attachment
◦ Easy attachment to
caster wheels
ME463 TEAM BASS DESIGN REVIEW 11
12. Torsion spring
connection to legs
◦ Allows user to only have
to open door to enter,
as door will
automatically close
behind user.
◦ Contains hooked
connection to support
straps
ME463 TEAM BASS DESIGN REVIEW 12
13. Introduction
Product Profile
◦ Problem Definition
◦ Concept: Product Functions and Features
◦ User Profile
Engineering Analysis
◦ Walker Dimensioning and Parts
Braking
◦ Modeling
◦ Justification
◦ Risk Assessment
Future Activities
◦ Gantt Chart
ME463 TEAM BASS DESIGN REVIEW 13
15. Push down the
handlebar to
unlock the brakes.
◦ Brakes locked
automatically to
guarantee that
walker will not slip.
◦ Provides high
stability for patient
while entering
walker
ME463 TEAM BASS DESIGN REVIEW 15
16. ‣ Interface to the frame is
held by bolts.
‣ Slide bearings reduce
friction while moving.
‣ Torsion spring provides
resistance against
pushing down and is
used to unlock the
brakes.
‣ Integration of functions
can be reduced at the
cost of a higher
complexity of the part
ME463 TEAM BASS DESIGN REVIEW 16
17. 4” in diameter
and width 2”.
Made of
polyurethane
Excellent for
use on wet
surfaces and
grips well on
hospital floors.
ME463 TEAM BASS DESIGN REVIEW 17
18. ‣Webbed PP
Straps
Connect to door
o
and side bar
o Purpose to
prevent or alleviate
damage from
falling
‣IV pole
connection
Screwed to front
o
leg
o Hangs down or
out
ME463 TEAM BASS DESIGN REVIEW 18
19. Introduction
Product Profile
◦ Problem Definition
◦ Concept: Product Functions and Features
◦ User Profile
Engineering Analysis
Walker Dimensioning and Parts
◦
Modeling
◦
Justification
◦
Risk Assessment
◦
Future Activities
◦ Gantt Chart
ME463 TEAM BASS DESIGN REVIEW 19
20. Buckling of Leg
Bending of Handlebar
Strength of Fall Protection
ME463 TEAM BASS DESIGN REVIEW 20
21. F
Fb = 17,528 lbs
Fmax = 440 lbs
SF = 39.84
ME463 TEAM BASS DESIGN REVIEW 21
22. F
σyield = 35,000 psi
σ = 17,378 psi
δmax = 0.37 in
SF = 2.02
ME463 TEAM BASS DESIGN REVIEW 22
23. σmax = 11,600 psi
F
σ = 698.27 psi
SF = 16.61
ME463 TEAM BASS DESIGN REVIEW 23
24. Introduction
Product Profile
◦ Problem Definition
◦ Concept: Product Functions and Features
◦ User Profile
Engineering Analysis
Walker Dimensioning and Parts
◦
Modeling
◦
Justification
◦
Risk Assessment
◦
Future Activities
◦ Gantt Chart
ME463 TEAM BASS DESIGN REVIEW 24
25. Some existing products offer:
Foldability
Intelligent braking system
Interfaces to commonly used medical devices
Fall protection
This product offers all of the above with
special emphasis on safety.
◦ Increases range of users.
ME463 TEAM BASS DESIGN REVIEW 25
26. Walker intended to support, while standing or
moving, human bodies that may be
particularly frail and may have otherwise
needed wheelchairs.
Thus, points of highest risk are:
◦ Falling
◦ Entering walker
The product has been designed primarily with these
risks in mind
ME463 TEAM BASS DESIGN REVIEW 26
27. Only when falling will the walker need to
support the entire weight of the user.
◦ Provide as much safety as possible without
reducing functionality.
◦ Belt installment can significantly prevent or lower
the consequence of most falls.
◦ Plan B: Place belt through the legs to improve front
fall protection.
Not implemented, as would reduce functionality
Handlebar designed in such a way to reduce likelihood
of front tipping, as force applied downwards and well
within base area.
ME463 TEAM BASS DESIGN REVIEW 27
28. Users of the walkers are inherently potentially
weak or fragile.
◦ While standing, users often try to lean on walker as
a support.
Wheels are default-locked.
◦ Provides stable support while entering.
Walker is back-entry with torsion spring
door.
◦ Allows users to entry directly into back from a
chair.
◦ User does not have to turn around to close and lock
door.
ME463 TEAM BASS DESIGN REVIEW 28
29. Mainly used material: 6061-T6
Aluminum alloy with magnesium & silicon
Some properties:
Min. yield strength 35000psi (241MPa)
Max. tensile strength 42000psi (290MPa)
ME463 TEAM BASS DESIGN REVIEW 29
30. Introduction
Product Profile
◦ Problem Definition
◦ Concept: Product Functions and Features
◦ User Profile
Engineering Analysis
Walker Dimensioning and Parts
◦
Modeling
◦
Justification
◦
Risk Assessment
◦
Future Activities
◦ Gantt Chart
ME463 TEAM BASS DESIGN REVIEW 30