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The Computational Analysis and Design Optimization of Roll Cage for AN SAE Standard Based Small Segment Car

Author(s):

Manjunath HS , Dr. Ambedkar Institute of Technology; Srinuvasu .N, Dr. Ambedkar Institute of Technology; Rathika M, Dr. Ambedkar Institute of Technology; Preethi K, Dr. Ambedkar Institute of Technology

Keywords:

DYNA, CATIA, SAE, FIA

Abstract

The primary objective of this paper is to optimize the design of a roll cage frame structure for SAE standard based small segment car. A small segment vehicle is a small, off road vehicle powered by a four stroke engine, thus large part of vehicle performance depends on acceleration which is proportional to the weight of the roll cage and hence chassis. To achieve greater performance of the vehicle, a balance must be found between strength and weight of the roll cage to ensure safety of the driver. So roll cage part of the chassis is the primary protection for the driver. The design optimization of roll cage is based on position, location and orientation of link. Hence a multi-body dynamic analysis is carried out to study performance of the roll cage. Modelling was done to distribute the mass of the vehicle over its frame members to simulate the real world problem for dynamic analysis. The finite element analysis software program used for solving the problem was LS-DYNA. the main criteria for selection of material of roll cage was safety, cost and durability.LS-DYNA is a general purpose explicit and implicit finite element program used to analyze the non-linear dynamic response of the three dimension structure. Due to the advances in computational techniques with the advent of higher end software, the computing capacity has been enhanced. Also computing capacity helps in reducing the design cycle time and saves the graphic and relative costs. In the present work, a Roll-cage for small car is analysed using implicit and explicit algorithms for stress conditions. The roll-cage is built using CATIA software for the standard dimensions. Modal analysis is carried out to find resonant frequencies to ease selection of the engine speed. Modal analysis results show improved natural frequency for the modified design. LSDYNA explicit analysis is carried out for 90KMPH speed for crash testing. This work is done to find the usage of crash solvers in the role-cage design and understanding the weak regions in the SAE structures.

Other Details

Paper ID: IJSRDV6I110326
Published in: Volume : 6, Issue : 11
Publication Date: 01/11/2019
Page(s): 497-506

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