连接结构的孔边强化层对复合材料含孔板失效过程的影响

Influence of Hole Strengthening Layer on the Failure Process of Composite Material Plate with a Hole in Connection Structures

在实际工程中,复合材料开口孔周围应力集中现象十分严重,使孔边极易发生破坏,且破坏形式多种多样。为提高含孔复合材料板的结构强度,可在孔边铺设一层一定厚度的材料,用来强化含孔板的承载能力。以三维逐渐损伤理论为基础,采用商用软件ANSYS的二次开发语言,建立对复合材料含孔板进行孔边结构强化的模型,在拉伸载荷下对具有强化结构的含孔复合材料板进行数值失效模拟计算,并与已有文献结果进行比较,验证了本模型的正确性。同时,分析各铺层的失效形式特点,以及不同强化层厚度对各铺层失效过程的影响,得到不同厚度的强化层下,层合板的初始失效载荷、最终失效载荷及整个失效过程,为复合材料含孔板强化结构的研究提供一定参考。

In practice,the stress concentration phenomenon in composite plate with holes is very severe.It will lead to various damages.In order to increase the structure strength of composite plate,an extra layer can be laid around the hole to improve the loading capacity.Based on three-dimensional progressive damage theory,with the secondary development language of ANSYS software,a model of open-hole composite material plate containing strengthening structures is developed to calculate the failure process under tensile load.The correctness of this model is verified through its comparison with existing references.Meanwhile,the failure mode of every layer and the influence of different strengthening layer thickness on failure process of each layer are analyzed,and the initial failure load,final failure load and whole failure process of laminated plate are obtained.This provides a certain reference for the research on strengthening structure of composite plate with holes.