DESIGN OF PARABOLIC LEAF SPRING BASED ON FEA AND EXPERIMENTAL RESULT

Abstract: Suspension is one of the main system in vehicle, which gives more comfort to passengers. There are many causes behind parabolic leaf spring failure like improper eye end design, inadequate thickness, maximum stresses in leaves. In any leaf spring, stresses are maximum at U-bolt clamp position and both end eye. In leaf spring, there is large deflection due to uneven loading of bump & rebound. The stress may occur at center flat distance and over the span of leaf spring. Usually working stresses in parabolic leaf spring are generally evaluated by using testing of spring with load deflection. Stress is evaluated at unclamped position for full-length leaves of entire leaf spring. It is seen that the actual bending stress at the fixed end calculated by testing is 5-6 % more in comparison with modified leaf spring. Bending stress occur away from the flat length of the specified area of the designed parabolic leaf spring. The finite element method by using ABAQUS is applied as a method of analysis to examine the stress distribution for each leaf gives formatting instructions for authors preparing papers for publication in the Proceedings of an International Journal. The authors must follow the instructions given in the document for the papers to be published. You can use this document as both an instruction set and as a template into which you can type your own text.

Keywords: Parabolic leaf spring, FEA, CAD, SAE, CAE