期刊
ENGINEERING FRACTURE MECHANICS
卷 76, 期 2, 页码 165-181出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2008.08.011
关键词
Extended finite element methods; Mixed-mode loading; Fatigue crack growth; Cyclic cohesive model
类别
资金
- German Science Foundation (DFG) [Yu119/5-1]
In the present paper an extended finite element method (XFEM) containing strong discontinuity within elements is introduced and implemented in the commercial general purpose software ABAQUS. The algorithm allows introducing a new crack surface at arbitrary locations and directions in elements. To consider fatigue crack nucleation and propagation in quasi-brittle materials the XFEM is combined with a cyclic cohesive model. Accumulative material damage is described by separate evolution equations. The crack path is completely independent of the mesh structure but determined by the mixed-mode loading cases. Numerical simulations illustrate the ability of this method to simulate fracture with unstructured meshes. The computational results agree with known fracture experiment data. Known fatigue observations can be predicted using the present model. (C) 2008 Elsevier Ltd. All rights reserved.
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