14th International Conference on Shot Peening

Rolling contact fatigue simulation considering surface integrities

Boyu Zhang, Huaiju Liu, Peitang Wei, Jizhan Wu

State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing, China

Corresponding author: huaijuliu@cqu.edu.cn

Introduction

As a main failure mode of mechanical elements in aviation, wind turbines, ships and automotive industries, rolling contact fatigue has become a critical issue limiting system reliability [1, 2]. Strengthening techniques such as shot peening improve the anti-fatigue performance by altering surface integrity parameters including surface roughness, residual stress, hardness gradient, and material microstructure [3, 4]. While it takes a large amount of time and money to complete rolling contact fatigue tests for processing parameters optimization. Therefore, the rolling contact fatigue simulation considering surface integrities is necessary.

Objectives

Herein, for saving time and financial cost, a finite element model of rolling contact fatigue was established considering measured surface integrity parameters (surface roughness, residual stress, and hardness) after shot peening. By comparing with the rolling contact fatigue tests, this rolling contact fatigue model can have a relatively accurate simulation results and can be an effective tool evaluating effects of surface integrities and processing parameters.