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Ultrasonic Fatigue Testing in the Tension-Compression Mode
Published on: March 7, 2018
Establishment and Verification of Multiaxis Fatigue Life Prediction Model
Zhuo Fu1, Xiang Li2, Sha Zhang1
1Department of Mechanical and Electronic Engineering, Changsha University, Changsha 410022, 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.
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