期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 47, 期 -, 页码 52-62出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2012.12.001
关键词
Laminates; Fracture toughness; Strength; Computational modelling
资金
- National University of Singapore
The tensile strength of open-hole fibre reinforced composite laminates depends on in-plane, thickness and ply lay-up scaling. Translaminar (fibre direction) mode I fracture toughness has recently been experimentally determined to be thickness dependent. This paper presents a computational study of the tensile strength prediction of open-hole laminates using a cohesive zone model. To the authors' knowledge, it is for the first time in the literature that the thickness-dependence of translaminar fracture toughness is accounted for in the numerical modelling of composites. The thickness size effect in the strength of open-hole composite laminates failed by pull-out is accurately predicted for the first time by a deterministic model. It is found that neglecting delamination in the numerical models will lead to mesh-dependency and over-estimation on the predicted strength. Smeared crack model with cohesive elements to model delamination is able to predict the correct failure mode; but it is found not suitable for accurate strength predictions for laminates failed by delamination. (c) 2012 Elsevier Ltd. All rights reserved.
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