基于有限元仿真的含中心孔层压板强度预测方法

在材料承载应力不可能超过其自身强度的原则上，假设复合材料遵循弹性-塑性等效就位力学行为，提出了一种基于线弹性有限元分析的含中心孔层压板渐进失效和强度预测的仿真方法；在仿真中对单元材料属性进行随机赋值以模拟真实材料状态，采用Hashin准则对材料失效进行判定并对失效材料按照其失效模式进行弹性常数退化；通过试验测试了5种不同铺层的玻璃/环氧复合材料带孔层压板的强度，在不单独考虑分层的条件下，含孔层压板的预测强度与试验结果吻合较好，与传统有限元预测方法相比，本方法不需要人为地确定失效材料的退化因子。

Strength Predicting Method of Composite Laminates with a Central Hole Based on FEA Simulation

On the basis of the natural rule that the stress carried by a material cannot surpass its strength,the authors hypothesize that a composite exhibites equivalent elastic-plastic in-situ behavior and present a method based on linear finite element analysis(FEA) to simulate the gradual failure process and notched strength of a composite laminate with a central hole.In this simulation,considering the scatter of the material in practical structure,the material properties of each element are randomly distributed....