The Rear Suspension Fatigue Analysis on the basis of the Virtual Proving Ground

Abstract:

Considering common artificial assumptions in traditional CAE analysis such as the structural nonlinear of tire , contact nonlinear between tire and road surface，stiffness and damping characteristics of rubber connector ，this paper describes the process of calculating road load by using explicit time integration in virtual proving ground where builds an integrated intensify road and full vehicle finite element model . Then apply the road load on rear suspension model which is described by elastic-plastic material to obtain stress-stain time history. Fatigue crack initiation life can be got by strain-life method and effect of mean stress is also considered.