A Project Report on Optimization of an Off Road Vehicle Ergonomics

Abstract

This paper contain the behaviour of A BAJA vehicle chassis which undergo the various load test like’’Front impact test, Side impact test, Rear impact test, Roll over impact”all the analysis of the test has been performed with the help of ANSYS WORKBENCH 18.1,where maximum deformation ,stress and strain calculated over duration of the particular impact.For the theoretical calculation we have use the INELASTIC COLLISION THEORY with this we have applied a force at a point .The boundary conditions and loading use different methodology. Study of ergonomics which help to give the ergonomically safer design according to the driver perspective.

Introduction

I. INTRODUCTION

1. A vehicle frame undergoes various endurance conditions and hence needs to be made rigid for the component and at the same time the driver clearance needs to be considered, judging at the premanufacturing stage becomes  difficult by only CAE Analysis.
2. Not considering ergonomic factors can lead to certain physical problem as

a. Disorder of dorsal muscle & back pain.

b. Pain in neck

c. Disorder of muscles, tendons, ligaments associated with the back portion.

II. WHAT IS ERGONOMIC AND WHY IT IS IMPORTANT

Ergonomics is a branch of a science that aims to learn about human abilities and limitation and then apply this  learning to improve people’s interaction

Ergonomics aims to improve the efficiency of the people and minimise the risk of injury or harm.

To achieve best practice design, Ergonomists use the data and techniques of several disciplines;

1. Anthropometry: body sizes, shapes
2. Biomechanics: muscles, levers, forces, strength
3. Environmental Physics: noise, light, heat, cold, radiation, vibration body system,  hearing, vision, sensation.
4. Applied Psychology: skill, learning, errors, differences
5. Social Psychology: groups, communication, learning, behaviours.

III. HISTORY OF ERGONOMICS

ALPHONSE CHAPANIS is known as the father of ergonomics; he was an American pioneer in the field of industrial design ,and widely considered one of the fathers of ergonomics or human factors, the science of ensuring that design takes account of human characteristics. Basic ergonomics has existed since the first ancestors of modern man began creating primitive tools to make tasks easier. Archaeological evidence from as far back as some of the earliest Egyptian dynasties, and other, more concrete findings from 5th Century BCE Greece, have shown that tools, household equipment, and other manmade devices illustrated sophisticated (for their time) ergonomic principles.Shortly after the Industrial Revolution, factory machinery and equipment started being built with design considerations closer to what we think of today as “ergonomics.

IV. OFF ROAD VEHICLE DESIGN CONSIDERATION

A. Design Consideration

Design consideration involves various factors such as material selection ,cross section selection, frame design and finite element analysis .

One of the key design decisions that tremendously increase the safety, reliability and performance in any vehicle structure is material selection.

B. Material Selection

AISI 4130 is a low alloy steel containing chromium and molybdenum as strengthening agent. The steel has good strength, toughness, weldability, and machinability .AISI 4130 is corrosion resistance and has a reasonable strength ,also it has high strength to weight ratio .It easily available in the market .In light of the over the favourable circumstances referenced the suitable material is AISI 4130

Conclusion

Safety of the driver is the first and foremost priority .therefore, considerable factor of safety is applied to roll cage of an atv reduce the risk of failure and possible injuries .Considering the ergonomically safer design will help the driver to drive a vehicle smoothly during an endurance race. larger factor of safety implies large ability of an ATV to withstand all kinds of loads and capable of moving on various terrains .this paper illustrate the entire analysis and design methodology of an atv an ergonomic safer design calculator for atv.

Copyright

Copyright © 2023 Aayush Gawai, Prathmesh Deshmukh, Sailee Achrekar, Shruti Kaklij, Anuprita Tikle. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.