复合材料层压板圆角区面外受载失效分析

Failure Analysis in the Corner Radius of a Composite Laminate under Out-of-Plane Load

为了研究复合材料层压板圆角区在面外载荷作用下的失效过程,基于ABAQUS有限元软件中的连续壳单元和cohesive单元建立了有限元模型,在该模型中,采用hashin准则预测面内损伤,而对于圆角区分层损伤的起始与扩展,则采用cohesive单元进行模拟。采用该模型对复合材料层压板圆角区在面外载荷作用下的破坏过程进行仿真,仿真结果与试验结果相比较表明:本文建立的有限元分析模型能较好地模拟复合材料层压板圆角区在面外载荷作用下的失效过程,并且能较好地预测该结构的承载能力。

This paper presents the results of numerical investigation concerning failure in the comer radius of a composite laminate under out-of-plane load. A finite element model which consists of continuous shell elements and cohesive elements is developed using ABAQUS finite element code. In the model, hashin criteria is used to deter-mine the interlaminar damage ; and the delamination between plies is simulated via cohesive elements. Failure in the comer radius of a composite laminate under out-of-plane load is investigated. Some conclusions are obtained based on the results ： the finite element model is so useful that the delamination in the comer radius and the loading capacity of composite laminate can be well predicted.