Quantitative analysis of fatigue cracks in laminated carbon fibre-reinforced polymer composites using micro-computed tomography

被引：6

作者：

ElAgamy, Naglaa ^{[1
]}

Laliberte, Jeremy ^{[1
]}

Gaidies, Fred ^{[2
]}

机构：

[1] Carleton Univ, Dept Mech & Aerosp Engn, Ottawa, ON, Canada

[2] Carleton Univ, Dept Earth Sci, Ottawa, ON, Canada

来源：

JOURNAL OF COMPOSITE MATERIALS | 2016年 / 50卷 / 18期

关键词：

CFRP; fatigue; microCT; DELAMINATION GROWTH; DAMAGE EVOLUTION; BONDED JOINTS; PART B; FAILURE; MODELS;

D O I：

10.1177/0021998315608252

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

A phenomenological study was carried out on laminated carbon fibre-reinforced polymer composites subjected to constant amplitude fatigue loading. Visualization of damage progression was performed using a high-resolution Skyscan micro-computed tomography unit which provided detailed information on propagation of initially occurring cracks throughout fatigue life at specific intervals. Quantitative analysis of image sequences of virtual cross-sections throughout the three orthogonal planes of the sample resulted in defining fatigue crack growth rates, da/dn for each plane, which was interpreted in terms of the three damage modes: opening (mode I), in-plane shear (mode II) and out-of-plane shear (mode III). By applying linear elastic fracture mechanics laws, strain energy release rates were calculated and then used in a cohesive zone model formulation to define model parameters. Considering a bi-linear triangular cohesive zone model curve, maximum traction and maximum separation were calculated for each of the three damage modes, differentiating between modes II and III in a novel manner.

引用

页码：2523 / 2540

页数：18

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