The IUP Journal of Mechanical Engineering
Static Structural Analysis and Topology Optimization of Lower Control Arm for LMV

Article Details
Pub. Date : May, 2020
Product Name : The IUP Journal of Mechanical Engineering
Product Type : Article
Product Code : IJME90520
Author Name : Subodh V Yende, D H Burande
Availability : YES
Subject/Domain : Engineering
Download Format : PDF Format
No. of Pages : 13

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Abstract

Lower control arm is used in front of independent suspension system. It is connected between subframe and knuckle. It holds the vehicle wheels in alignment and forms the unsprung mass of vehicle. High unsprung weight complicates steering control and traction control issues. The paper deals with the reduction of unsprung mass of vehicle by topology optimization of lower control arm. For the analysis, existing lower control arm of Mac-Pherson suspension system is selected. CAD modeling is done using CATIA software. ANSYS software is used for static structural analysis of existing model by applying the required loading and boundary conditions. On the basis of the stress developed, topology optimization is carried out by removing excess material from CAD model. Lower control arm is redesigned and analyzed for stress distribution and deformation. Total reduction of weight in the existing model is found to be 16.66%.


Description

Suspension system is an integral part of automobile. It prevents the road shocks being transmitted to vehicle frame and other components of vehicle. Its main function is to provide stability, safety and comfort to passengers. It maintains traction between the tyre and road surface. Lower control arm is an important component in the suspension system. It is present in both Mac-Pherson suspension and double wishbone suspension system (Sridharan and Balamurugan, 2016). If there is no control arm in the suspension system, then it is expected to result in undesirable vibrations and unwanted driving irregularities that could lead to road accidents like collision with other vehicles or obstruction on the road. Control arm connects car suspension to the actual vehicle frame. One end of lower control arm is connected to knuckle through a ball joint and other end is attached to vehicle subframe. It supports the entire weight of the front vehicle and controls the front wheel movement throughout its travel. Topology optimization includes removing unnecessary material from the base model to reduce weight by applying the given sets of objectives and constraints. Excess material is removed from the low stressed region of control arm. The existing design of left lower control arm from LMV having Mac-Pherson suspension system is selected for the study (Maruti Suzuki Swift Dzire). It is essential to focus on the stress and deformation behavior to develop the changes in the existing design. FEA approach is used for static structural analysis and topology optimization of control arm.


Keywords

Static structural analysis, Topology optimization, Unsprung mass, Lower control arm

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