A progressive damage model for predicting damage evolution of laminated composites subjected to three-point bending
A progressive damage model for predicting damage evolution of laminated composites subjected to three-point bending
复制标题
用于预测三点弯曲层合复合材料损伤演变的渐进损伤模型
DOI：
10.1016/j.compscitech.2017.08.009
复制
发表时间：
2017-10-20
影响因子：
9.1
通讯作者：
Bao, Yongjie
中科院分区：
文献类型：
--
作者：
Yang, Yuxing;Liu, Xueshu;Bao, Yongjie
基于Hashin型破坏准则和内聚区方法，建立了一种新的渐进损伤模型，该模型包含一组刚度逐渐退化的规则，用于研究复合材料层合板在三点弯曲载荷作用下的弯曲性能和损伤演化。该模型考虑了8种失效模式的损伤演化。将本模型和Linde模型的分析结果与三点弯曲试验结果进行比较，发现本模型得到的刚度和最大强度与试验结果吻合较好。刚度和最大强度的计算结果与实验值的相对误差分别为-0.35%和0.75%。该模型能较好地预测荷载-挠度曲线在极限荷载后的退化阶段，退化阶段4个特征点的荷载相对误差小于12.5%，挠度相对误差小于8.5%。最终预测的失效和损伤演化与从失效试样观察到的损伤显微照片具有良好的一致性。(C)2017爱思唯尔有限公司版权所有
Based on the Hashin-type failure criteria and cohesive zone method, a new progressive damage model with a set of gradual stiffness degradation rules was developed to investigate the flexural behavior and the damage evolution of laminated composites subjected to three-point bending. Eight kinds of failure modes were considered for damage evolution in the present model. Compared the analysis results of the present model and Linde's model with the results of three-point bending experiments, it was found that both stiffness and the maximum strength obtained from the present model were in accordance with experimental results. The relative errors of stiffness and the maximum strength between the present model and the experiments were -0.35% and 0.75%, respectively. The degradation stages of the load deflection curve after the ultimate load can be well predicted by the present model with relative load errors less than 12.5% and relative deflection errors less than 8.5% for four characteristic points of the degradation stages. Both final predicted failures and damage evolution were in good agreement with the damage micrographs observed from the failed specimens. (C) 2017 Elsevier Ltd. All rights reserved.