期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 108, 期 -, 页码 16-22出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2015.01.002
关键词
Polymer-matrix composites (PMCs); Matrix cracking; Stress concentrations; Probabilistic methods
资金
- European Union [246389]
- Agency for Innovation by Science and Technology in Flanders (IWT)
- FWO Flanders
- UCSB Center for Scientific Computing at CNSI
- UCSB MRL: an NSF MRSEC [DMR-1121053]
- NSF [CNS-0960316]
Despite the crucial significance of failure prediction in composites, such an objective remains challenging, even in unidirectional (UD) systems. A strength model for UD composites was used that has great versatility in handling various matrix and fibre behaviours. This model includes a simplified superposition principle that was found to be reliable in predicting stress concentration factors irrespective of the presence of matrix cracks. The model revealed the negligible influence of matrix cracks on stress concentrations, ineffective length, cluster development and failure strain. The presence of matrix cracks can therefore be safely neglected in models for UD composites. This information is important for experimental validations and for advancing the state of the art in strength models for UD composites. (C) 2015 Elsevier Ltd. All rights reserved.
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