Design and Analysis of Base Valve of Twin Tube Dampers Dheeman Bhuyan 1a and Kaushik Kumar 2b* 1 Research Scholar, Department of Mechanical Engineering, Birla Institute of Technology, Mesra, Ranchi 835215, India 2 Associate Professor, Department of Mechanical Engineering, Birla Institute of Technology, Mesra, Ranchi 835215, India a dheemanbhuyan@live.in, b kkumar@bitmesra.ac.in Keywords: Twin Tube Damper, Shock Absorber, Base Valve Abstract. In this article we seek to model a base valve of a twin tube shock absorber and study the behaviour of the valve under loaded conditions replacing a mono tube shock absorber. A top down approach was adopted for this work wherein a commercially available shock absorber was stripped down to obtain the individual valves inside. Product teardown was done for the various subassemblies and the base valve was isolated. Modelling was done in PTC Creo 2.0 and the FEA study for the stress and flow analysis was done using ANSYS 15.0. The materials as well as the hydraulic fluid selected for the design were validated and proved to give a better performance than a mono tube shock absorber currently being used in automobiles. Introduction The role of shock absorbers in vehicle dynamics is a critical one. In addition to reducing the noise in the passenger compartment of the vehicle and increasing the comfort of the ride, the shock absorbers are involve in reducing the relative motion of the wheels and the body of the car and providing better handling and safety. The need for damping of vibrations produced by the movement of the vehicle over a road surface has been felt for as long as the automobile industry has existed. The first production shock absorber was the Telesco Shock Absorber exhibited in the 1912 Olympia Motor Show. Technology has progressed by leaps and bounds over the following years to get to where we stand today. The function of the shock absorber is often misconstrued to be the absorption of vibrations in the system. However that job is done by the spring. The shock absorber provides the damping force necessary to dissipate the energy absorbed by the spring while neutralizing the original shock. Initial designs of dampers utilized friction as the damping force. Hydraulic damping was introduced early in the 20th century but did not catch on. It was only after the 1908 and 1909 patents of Maurice Houdaille [1-2], that hydraulic shock absorbers came into production. Applied Mechanics and Materials Submitted: 2016-02-19 ISSN: 1662-7482, Vol. 852, pp 504-510 Revised: 2016-05-04 doi:10.4028/www.scientific.net/AMM.852.504 Accepted: 2016-06-09 © 2016 Trans Tech Publications, Switzerland Online: 2016-09-07 All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of Trans Tech Publications, www.ttp.net. (#69527732-07/09/16,18:05:48)