Large damage capability of non-crimp fabric thin-ply laminates

被引:39
作者
Arteiro, A. [1 ]
Catalanotti, G. [1 ]
Xavier, J. [2 ]
Camanho, P. P. [1 ]
机构
[1] Univ Porto, DEMec, Fac Engn, P-4200465 Oporto, Portugal
[2] Univ Tras Os Montes & Alto Douro, CITAB, P-5001801 Vila Real, Portugal
关键词
Laminates; Stress concentrations; Analytical modelling; Mechanical testing; NONLINEAR FRACTURE PROPERTIES; NOTCHED RESPONSE; FAILURE; TENSILE; COMPOSITES; MECHANICS; ORTHOTROPY; PREDICTION; TOUGHNESS; ENERGY;
D O I
10.1016/j.compositesa.2014.04.002
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The residual strength of thin-ply non-crimp fabric laminates with large through-the-thickness cracks is investigated in this paper. Analysis methods such as the linear elastic fracture mechanics, inherent flaw, point-stress, average-stress and Finite Fracture Mechanics are used to predict large damage capability. Experiments show that thin-ply non-crimp fabric laminates exhibit high resistance to propagation of large cracks and a remarked crack-bridging effect. Due to the unsuitability of existing models to capture such bridging processes, large damage capability is systematically underestimated by the traditional analysis methods. By taking into account the R-curve of the material in the Finite Fracture Mechanics analysis good predictions of the notched response of laminated plates with large through-penetration damage are obtained using only independently measured material properties; in addition, the Finite Fracture Mechanics model does not require fitting parameters or complex finite element analyses. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:110 / 122
页数:13
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