Failure analysis of triaxial braided composite

被引：124

作者：

Ivanov, Dmitry S. ^{[1
]}

Baudry, Fabien ^{[1
]}

Van Den Broucke, Bjorn ^{[1
]}

Lomov, Stepan V. ^{[1
]}

Xie, Hang ^{[1
]}

Verpoest, Ignaas ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Met & Mat Engn MTM, B-3001 Heverlee, Belgium

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2009年 / 69卷 / 09期

关键词：

Textile composite; Matrix cracking; Damage mechanics; Mutliscale modelling; Acoustic emission; TEXTILE COMPOSITES; PART; DAMAGE; MICROMECHANICS;

D O I：

10.1016/j.compscitech.2008.09.013

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

This study focuses on the description of damage and failure behaviour of triaxial braided carbon/epoxy composites under tension. The tensile tests were instrumented with optical surface strain and acoustic emission measurements. Damage was observed using X-ray and microscopy. The damage develops in two stages: (I) intra-yarn cracking: increase of the crack density and crack length, (2) local inter-yarn delamination and conjunction of the intra-yarn cracks. Statistics of crack sizes at both stages were collected and the 3D geometry of cracks was reconstructed. A finite element model of the unit cell of the textile reinforcement is used to predict damage initiation and crack orientation using Puck's criterion. Progressive damage and stiffness deterioration is modelled using the degradation scheme of Murakami-Ohno and the damage evolution law of Ladeveze, applied to the average stress state of the yarns. Good agreement with experimental damage initiation threshold and non-linear tensile diagrams is found both for loading in fibre and off-axis directions. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1372 / 1380

页数：9

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