期刊
ENGINEERING FRACTURE MECHANICS
卷 76, 期 16, 页码 2429-2444出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2009.06.013
关键词
Out-of-plane stress constraint factor T(z); J-integral; Embedded elliptical crack; Three-dimensional elastic-plastic finite element
类别
资金
- NSF of China
- Aviation science foundation [2007ZA52011, 2008ZF52062]
- Scientific Research Innovation Project of Jiangsu Province [xm06-42]
A three-parameter approach for an embedded center-elliptical crack under tension is presented by systematic three-dimensional (3D) elastic-plastic finite element. It is shown that even in the well embedded condition, the conventional two-dimensional HRR solution and the extended J-Q description which considers the in-plane constraint modification can hardly provide satisfied description for the crack front fields with the increase of radial distances (r/U/sigma(0))) and strain hardening exponent n. Thus, a consideration of the out-of-plane constraint and use of the three-parameter description is necessary and efficient to predict the 3D stress fields in the whole plastic zone. (C) 2009 Elsevier Ltd. All rights reserved.
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