Measurement of the compressive crack resistance curve of composites using the size effect law

被引：62
作者：
Catalanotti, G. [1 ]
Xavier, J. [2 ]
Camanho, P. P. [1 ]
机构：
[1] Univ Porto, Fac Engn, DEMec, P-4200465 Oporto, Portugal
[2] Univ Tras Os Montes & Alto Douro, CITAB, P-5001801 Vila Real, Portugal
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2014年 / 56卷
关键词：
Polymer-matrix composites (PMCs); Fracture toughness; Analytical modelling; Mechanical testing; PROGRESSIVE FAILURE MODEL; VELOCITY IMPACT DAMAGE; INELASTIC DEFORMATION; FRACTURE-TOUGHNESS; POLYMER COMPOSITES; FIBER COMPOSITES;
D O I：
10.1016/j.compositesa.2013.10.017
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper presents a new methodology to measure the compressive crack resistance curve of the longitudinal plies of carbon-epoxy laminates. The methodology is based on three main steps: the first one corresponds to the determination of the energy release rate of cross-ply laminates with two edge cracks using a parametric finite element model. The energy release rate is used in the definition of a relation between the crack resistance curve and the size effect. Finally, experimental tests are performed in scaled double-edge notched specimens to quantify the size effect law, thus proving the last piece of information required to define the crack resistance curve. The full crack resistance curve is obtained for the IM7-8552 carbon epoxy composite material. The methodology proposed in this paper overcomes the inherent limitations of the existing test methods, and it serves as the basis for the identification of cohesive laws used in some analysis models. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：300 / 307
页数：8
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