期刊
COMPOSITE STRUCTURES
卷 116, 期 -, 页码 509-522出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2014.05.042
关键词
Multidirectional laminates; Delamination growth; Finite element analysis (FEA); Cohesive elements; Interfacial behavior
资金
- National Science Foundation of China [11372020, 11202012]
- National High Technology Research and Development Program of China [2012AA040209]
- Innovation Foundation of BUAA for PhD Graduates [YWF-14-YJSY-037]
A numerical model for accurately predicting the delamination propagation in multidirectional laminates under mode I and mixed-mode I/II loadings using the cohesive element is proposed in this paper. Instead of a constant fracture toughness, a fracture toughness function which reflects the variation of fiber bridging tractions, accompanying with a group of appropriate interface stiffness, interface strength, the number of cohesive elements in cohesive zone and viscosity coefficient determined by the trial and error method among recommended guidelines or values in literatures, can provide accurate simulations on the delamination growth in the multidirectional laminates. The predicted delamination behaviors of the multidirectional laminates with interfaces 0 degrees/5 degrees, 45 degrees/-45 degrees and 90 degrees/90 degrees in both the DCB and MMB tests are consistent with experimental outcomes, which give evidence of the effectiveness of the proposed model. (C) 2014 Elsevier Ltd. All rights reserved.
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