Finite Element Analysis of Leaf Spring

Finite Element Analysis of Leaf Spring

Group Members : Pranjal Nautiyal, 2011104Surbhi Namdeo, 2011156

Introduction to Leaf Spring

•Leaf Spring is used for suspension in wheeled vehicle•It takes the form of a slender arc shaped length of

spring steel of rectangular cross section•For very heavy vehicles, a leaf spring can be made from

several leaves stacked on top of each other in several layers

•A leaf spring can either be attached directly to the frame at both ends or attached directly at one end

•The leaf spring acts as a linkage for holding the axle in position and thus separate linkage are not necessary

Leaf Spring Design

Schematic diagram of a leaf spring

Finite Element Analysis

Mesh generation

Structural Steel Leaf Spring

•Applied Load= 100 N•Maximum deflection= 9.8354e-007 m

•Applied Load= 25 kN•Maximum deflection= 2.4589e-004 m•Maximum Normal stress= 3.6273e+007 Pa•Maximum Normal elastic strain= 1.2387e-004 m/m

•Applied Load= 50 kN•Maximum deflection= 4.9177e-004 m•Maximum Normal stress= 7.2545e+007 Pa•Maximum Normal elastic strain= 2.4774e-004 m/m

Stainless Steel Structure

•Applied Load= 100 N•Maximum deflection= 1.01 X 10-6 m•Maximum Normal stress= 1.4815e+005 Pa•Maximum Normal elastic strain= 5.0802e-007

•Applied Load= 25 kN•Maximum deflection= 2.5482 X 10-4 m•Maximum Normal stress= 3.7038e+007 Pa•Maximum Normal elastic strain= 1.27e-004 m/m

•Applied Load= 50 kN•Maximum deflection= 5.09 X 10-4 m•Maximum Normal stress= 7.4e+007 Pa•Maximum Normal elastic strain= 2.54e-004 m/m

Composite Leaf Spring

•Applied Load= 100N•Maximum deflection= 1.0057 x 10-6 m•Maximum Normal stress= 1.5083e+005 Pa•Maximum Normal elastic strain= 5.1929e-007 m/m

•Applied Load= 25 kN•Maximum deflection= 2.5142 x 10-4 m•Maximum Normal stress= 3.7709e+007 Pa•Maximum Normal elastic strain= 1.2982e-004 m/m

•Applied Load= 50 kN•Maximum deflection= 5.0284x 10-4 m•Maximum Normal stress= 7.5417e+007 Pa•Maximum Normal elastic strain= 2.5964e-004 m/m

Discussion based on Outcome

•Quite obviously, deflection value is increasing with applied load.

•Order of deformation observed:Structural steel< Composite leaf spring< Stainless steel

Thank You