Paper Title:

Finite Element Analysis of the Effect of the Compressive Loading on Fatigue Crack Growth under Different Loading

Periodical Applied Mechanics and Materials (Volumes 16 - 19)
Main Theme e-Engineering & Digital Enterprise Technology VII
Edited by Kai Cheng, Yongxian Liu, Xipeng Xu and Hualong Xie
Pages 269-272
DOI 10.4028/www.scientific.net/AMM.16-19.269
Citation Yu Sha et al., 2009, Applied Mechanics and Materials, 16-19, 269
Online since October, 2009
Authors Yu Sha, Hui Tang, Xin Song, Jia Zhen Zhang
Keywords Compressive Loading, Crack Tip Displacement, Fatigue Crack Growth, Finite Element Analysis (FEA)
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Abstract

In this paper, elastic-plastic finite element analysis has been performed in order to obtain the fatigue crack tip parameters under tension-compression loading. Two centre-cracked high-strength aluminum alloy with a crack length of 2mm under different tension-compression loading are analyzed. The analysis shows that the compressive loading has a significant contribution towards the crack tip plasticity and the crack tip stress. In a tension-compression loading the crack tip displacement increases with the increase of the compressive stress and the crack tip compress stress increases with the increase of the compressive stress. The maximum stress intensity Kmax in the tension part of the stress cycle and the maximum compressive stress in the compression part of the stress cycle are the main factors controlling the near crack tip parameters.