A Modified Ultimate Failure Criterion and Material Degradation Scheme in Bridging Model Prediction for Biaxial Strength of Laminates
A Modified Ultimate Failure Criterion and Material Degradation Scheme in Bridging Model Prediction for Biaxial Strength of Laminates
复制标题
DOI：
10.1177/0021998308094551
复制
发表时间：
2008-10
影响因子：
2.9
通讯作者：
Ye Zhou;Zheng-ming Huang
中科院分区：
文献类型：
--
作者：
Ye Zhou;Zheng-ming Huang
第一次世界范围内的故障演习（WWFE-I）表明，桥接细观力学模型在计算内部的热应力在组成纤维和树脂材料的层压复合材料中表现出独特的功能。然而，一旦应用于层合板强度预测，该模型只给出了适度的相关性与实验。在这篇文章中，材料退化计划和修改的极限破坏准则的层合板被纳入桥接模型，以提高其预测能力。纯树脂夹层也被引入来模拟层合板之间的界面效应。通过这些修改，对于大多数的运动问题，特别是对于多向层合板的极限强度和变形，得到了更精确的预测。目前的理论预测与实验的相关性甚至比在练习中所做的任何其他理论预测都要好。
The first worldwide failure exercise (WWFE-I) indicated that the bridging micromechanics model exhibited a unique feature in calculating internal thermal stresses in the constituent fiber and resin materials of a laminated composite. Once applied to laminate strength prediction, however, the model only gave moderate correlation with the experiments. In this article, a material degradation scheme and a modified ultimate failure criterion for laminates are incorporated into the bridging model to improve its predictive capacity. Pure resin inter-layers are also introduced to simulate the effect of interfaces in between the lamina plies. With these modifications, much more accurate predictions have been obtained for the majority of the exercise problems, especially for the ultimate strengths and deformations of the multi-directional laminates. The correlation of the present theory predictions with the experiments is even better than that of any other theory predictions made in the exercise.