基于三维应变渐进损伤准则的复合材料层合板大开孔压缩损伤研究

针对复合材料层合板大开孔压缩,将二维应变渐进损伤准则修正为三维应变渐进准则,使其能够模拟层合板的分层损伤,建立了复合材料层合板大开孔压缩损伤分析模型。利用UMAT子程序将基于三维应变渐进损伤准则引入到分析模型中预测纤维、基体及分层等失效演化过程;并对大开孔复合材料层合板进行试验研究。试验结果表明所建立的基于三维应变渐进损伤准则的层合板大开孔分析模型能很好地模拟大开口复合材料层合板压缩过程中的损伤起始、损伤扩展及破坏模式;并最终预测复合材料层合板大开孔的破坏强度。

Damage Analysis of Composite Laminate with Large Open-hole under Compression Using 3D Strain Progressive Damage Theory

A new model for the damage analysis of composite laminate with large-open hole under compression was developed using 3D strain progressive damage theory of which is an improvement from 2D strain progressive damage theory. The analysis model was incorporated into ABAQUS FE analysis through user subroutine UMAT to model various composite laminate failure types, such as matrix cracking, fiber failure, delamination, and etc. It can simulate damage initiation, damage progression and failure load for the composite laminate with large open-hole under compression. A test on composite laminate with large-open hole has been done and its result of failure load agree well with that predicted using the damage analysis.