IJSRD - International Journal for Scientific Research & Development| Vol. 6, Issue 03, 2018 | ISSN (online): 2321-0613 All rights reserved by www.ijsrd.com 49 Design and Analysis of Wave Spring for Two Wheeler Rear Suspension System – A Review Mr. Krupesh H. Dave 1 Mr. Bhavik M. Padhiyar 2 Mr. Hardik J. Bhatt 3 1 PG Scholar 2,3 Assistant Professor 1,2,3 Department of Mechanical Engineering 1,2,3 SAL College of Engineering, Ahmedabad, India Abstract— Since many years there is so many research work done on helical spring due to its vast range of working and reliability in various sector, like machines, automobiles etc. All researcher have modified design, changed materials for various purpose. But the conventional spring still in use. Now, with change in time and technology better to find alternative option for it. Wave spring which is different from conventional design, was first conceptualized by the SMALLEY Industries, U.S.A. in 1990’s for purpose of to keep machine component connected by spring pressure. They use the Hooke’s law while designing of it. Wave spring occupies 50% less space than conventional spring, also it have long lasting effectiveness and good durability. For the two wheeler rear suspension system wave spring is designed with the same dimensions of helical spring. The spring is designed and analyzed both theoretically and numerically. Load is considered as the bike weight and two person weight. Structural steel and copper alloy are taken as the spring material. In theoretical analysis the analytical equations are used where as in numerical analysis the structural and fatigue analysis is performed. This present study focuses on the selection of the best spring with the best material for the two wheeler rear suspension system. Soild works is used for the designing of the spring and analysis is performed by the ANSYS. Key words: Wave spring, Rear suspension, Structural analysis, Modified design I. DESIGN AND ANALYSIS OF A SHOCK ABSORBER In this research paper the significance of shock absorber in two wheeler is described. Generally the shock absorber is used to reduce the effect of up and down movement due to road surface. That’s why bouncing process is being continued and creates the problem in the management of vehicle. The model of shock absorber can also be changed by the varying the thickness of the spring. Design is done by using Pro/Engineering and analysis done by ANSYS. By applying the two different materials like spring steel and beryllium copper, analysis is performed. It results that for spring steel we found the low stress value and as changing diameter of the spring, the less quantity of material will use. Improved design is done by decreasing 2mm diameter of spring than actual diameter. By comparing analysis of both spring and for both material, we found that SS is best material and the modified design is safe. Fig. 1: Modified design of helical spring A. Failure Analysis of a Helical Compression Spring for a Heavy Vehicle’s Suspension System. The conventional helical spring which is used in the automobile system has one big problem of fatigue failure. We can found that spring ususally fractured at the conversion position. From the bearing coil to the first active coil. In a heavy vehicle suspension spring analysis, there are observations/operations used which are visual observations, scanning electron microscopy, stress analysis, chemical and microstructure analysis. After all the mentioned inspections, it revealed that stress singularities due to non- hertzian contact between bearing coil and first active coil invites the fatigue crack initiation. Observation resulted that we shave to adopt the non-closed ends design to avoid wear and corrosion of spring. Local hard facing to protect from wear applied on the end coils if necessary.