期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 88, 期 -, 页码 68-77出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2016.03.018
关键词
3D finite element modeling; Plasticity-induced crack closure; Effective stress intensity factor range; Crack front shape; Stainless steel
This paper deals with the numerical study of the plasticity-induced crack closure of through-thickness plane cracks, in CT specimens made of 304L austenitic stainless steel. The initial crack front is straight. Constant amplitude of the stress intensity factor is applied in order to limit the loading history influence. Crack propagation is achieved through automatic remeshing, with elastic and plastic parallel calculations. The local effective stress intensity factor range is calculated along the crack front, and considered as the propagation driving force. A comparison with experimental crack front shape allows the validation of the employed method, although some discrepancies remain near the specimen edges. (C) 2016 Elsevier Ltd. All rights reserved.
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