A novel laminate analogy to calculate the strength of two-dimensional randomly oriented short-fiber composites

被引：29
作者：
Shokrieh, M. M. [1 ]
Moshrefzadeh-Sani, H. [1 ]
机构：
[1] Iran Univ Sci & Technol, Composites Res Lab, Ctr Excellence Expt Solid Mech & Dynam, Sch Mech Engn, Tehran 1684613114, Iran
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2017年 / 147卷
关键词：
Laminate analogy approach; Micromechanics; Two-dimensional short-fiber composites; Progressive damage model; Strength; TENSILE-STRENGTH; SIMULATION; FAILURE; DAMAGE; MODEL;
D O I：
10.1016/j.compscitech.2017.04.034
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
In this paper, a new laminate analogy for progressive damage modeling of two-dimensional randomly oriented short-fiber composites is developed. In the present model, two-dimensional randomly oriented short-fiber composite is replaced by an equivalent laminated composite, which contain several unidirectional layers oriented between 0 degrees to 180 degrees. An incremental algorithm is presented to simulate the stress-strain behavior of composites up to the final failure. In the first step, using the shear-lag theory and the Halpin-Tsai method, the on-axis stiffness and strength of each layer were calculated. Then, using the Tsai-Wu failure criterion, damaged layers were detected and the residual moduli of damaged layers were calculated by a random based approach. After failure of each layer, undamaged layers must sustain more stresses. Therefore, the continuum damage mechanics was used to calculate the effective stress in each load increment. A comparison of results of the present model with experimental data available in the literature shows the capability of the model. (C) 2017 Elsevier Ltd. All rights reserved.
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页码：22 / 29
页数：8
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