Derivation and analysis of a combined fretting wear-fatigue model based on the asymptotic equivalence between perfect plasticity and friction

https://doi.org/10.1016/j.ijsolstr.2020.06.041Get rights and content
Under an Elsevier user license
open archive

Abstract

Fretting analysis may be of critical importance in the design of mechanical structural components when the contact interfaces are subjected to cyclic tangential loading. Indeed, fretting damage may induce various mechanisms of failure, such as wear, but may also lead to fretting fatigue through the early development of embryo cracks than can result in a significant decrease in fatigue performance. In the present paper, an original theoretical model encompassing both phenomena is proposed, as derived from the proven asymptotic equivalence between perfect plasticity and friction and using a continuum damage approach in the intermediate perfectly plastic volume of small thickness. This asymptotic process enables to obtain a law for sliding wear rate evolution and a fretting-fatigue law in the low-cycle fatigue regime based on a unified approach. Both parts of the resulting model are discussed and analyzed in detail by comparison or analogy with existing approaches from the literature on the topic. A detailed strategy for numerical implementation is finally addressed at the end of the paper.

Keywords

Friction
Plasticity
Damage mechanics
Fretting-wear
Fretting-fatigue

Cited by (0)