Effect of matrix damage on compressive strength in the fiber direction for laminated composites

被引：21
作者：
Eyer, G. [1 ]
Montagnier, O. [1 ,2 ]
Hochard, C. [1 ]
Charles, J. -P. [1 ]
机构：
[1] Univ Aix Marseille, CNRS, Cent Marseille, LMA, Marseille, France
[2] Ecole Air, Ctr Rech Armee Air, BA 701, F-13661 Salon Air, France
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2017年 / 94卷
关键词：
Polymer-matrix composites (PMCs); Strength; Damage mechanics; Mechanical testing; FAILURE; BEHAVIOR; DESIGN; STRAIN; PLY;
D O I：
10.1016/j.compositesa.2016.12.012
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An original experimental method is proposed to characterize the influence of matrix damage on the compressive strength of laminated composites in the fiber direction using tubes. These composite tubes have a dumbbell-shaped geometry so that rupture occurs in the specimen center without stress concentration. They can be constituted of unidirectional or woven plies aligned with the axial direction. First, a torsional cyclic load is applied in order to damage the matrix. This damage is measured at the tube scale via the reduction in shear modulus. Second, a compressive load is applied up to failure for various damage levels. The method is applied to a woven carbon/epoxy material. Results show that the matrix damage affects significantly the compressive strength in the fiber direction. It is yet observed that longitudinal stiffness is not modified by damage. Finally, a simple model is proposed to describe this decrease of strength vs. matrix damage. (C) 2016 Elsevier Ltd. All rights reserved.
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收藏
页码：86 / 92
页数：7
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