Design, static and dynamic analysis of automobile chassis
G Ganga Rao, M Suresh
In the present scenario, the automotive industry has been one of the rapid growing industries and is facing heavy competition from the competitors. This necessitates the need to work on various functional aspects of the automobile, starting from chassis design to aesthetic design. As a part of this, the present work aims to study the static characteristics of automobile chassis.rnThe chassis acts as a skeleton on which, the engine, wheels, axle assemblies, brakes, suspensions etc. are mounted. The chassis receives the reaction forces of the wheels during acceleration and braking and also absorbs aerodynamic wind forces and road shocks through the suspension. So the chassis should be engineered and built to maximize payload capability and to provide versatility, durability as well as adequate performance. rn All real physical structures, when subjected to loads or displacements, behave dynamically. The additional inertia forces, according to Newton’s second law, are equal to the mass times the acceleration. If the loads or displacements are applied very slowly, then the inertia forces can be neglected and a static load analysis can be justified, but in reality the loads are dynamic in nature. Hence, in this work, an effort is made to investigate the static and dynamic response of truck chassis due to road undulations.rnThe geometric modeling of the various components of the chassis is carried out in part mode as 3D models using Pro/ENGINEER 2001 software. The section properties, viz, cross-sectional area details of the 3D modeled parts are estimated using the modeling software. The above properties have been used as input while performing the finite element analysis using ANSYS7.1 software.rnThe finite element model of the chassis is created using ANSYS 7.1 package. Static analysis is done for vehicle on a plain road and bump conditions. The model is subjected to static analysis for all the conditions specified. The stress and deflection plots are determined.