Establishment and Verification of Multiaxis Fatigue Life Prediction Model

Zhuo Fu; Xiang Li; Sha Zhang; Hanqing Xiong; Chi Liu; Kun Li

doi:10.1155/2021/8875958

Establishment and Verification of Multiaxis Fatigue Life Prediction Model

Scanning. 2021 Feb 2:2021:8875958. doi: 10.1155/2021/8875958. eCollection 2021.

Authors

Zhuo Fu¹, Xiang Li², Sha Zhang¹, Hanqing Xiong¹, Chi Liu¹, Kun Li¹

Affiliations

¹ Department of Mechanical and Electronic Engineering, Changsha University, Changsha 410022, China.
² Department of Mechanical and Electronic Engineering, Central South University, Changsha 410083, China.

Abstract

A fatigue life prediction model with multiaxis load is proposed. The model introduces a new effective cyclic parameter, equivalent stress on the critical surface, to modify the Suntech model. The new damage parameters are not related to empirical constants, hence more applicable for practical application in engineering. The multiaxis fatigue test was carried out with high-strength aluminum alloy 7075-T651, and the multiaxis fatigue life prediction of the test piece was conducted with the finite element software. The experiment result shows that the model proposed is effective for predicting the fatigue life under multiaxis load.