Finite element investigations of the shrink-fit assembly with radial cyclic load

Abstract

Fretting is a widely used process to assemble mechanical parts and its knowledge is based on simple calculation models applied for simple and symmetric geometries. In this paper we model this process for cylindrical parts in order to study the behavior of a modified assembly under a cyclic radial load through a rigid drive shaft. A tangential movement of the shrink relative to the hub is raised. When these movement are localized and do not present a global rotation of the shrink, the behavior of the assembly is ensured. However, under certain conditions, these tangential displacements accumulate from one cycle to another up to initiate a global relative movement of the shrink, which in some cases lead to the failure of the assembly. In this work, we highlight this phenomenon and other studies will follow to improve the knowledge of this behavior.