期刊
THEORETICAL AND APPLIED FRACTURE MECHANICS
卷 73, 期 -, 页码 128-135出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tafmec.2014.07.012
关键词
Multiaxial fatigue; Non-proportional loading; PEEK; Fatigue life prediction; Fatigue criterion
资金
- National Natural Science Foundation of China [11372215]
Multiaxial fatigue test were conducted on PEEK under four loading paths and several criteria were used for life prediction. Predictions based on Fatemi-Socie criterion fall out of the factor-of-two line on the conservative side for proportional loading and non-proportional loading. The normal strain-based Smith-Watson-Topper criterion yield good prediction for proportional loading but non-conservative prediction for nonproportional loading. Taking the contribution from shear component into consideration, the Chen-Xu-Huang criterion achieve satisfactory results for both proportional loading and non-proportional loading, but with non-conservative prediction for pure torsion loading. To consider general cracking behavior, the modified SWT criterion is adopted and good agreement between experimental data and prediction values is achieved. (C) 2014 Elsevier Ltd. All rights reserved.
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