不规则孔隙对复合材料横向拉伸力学性能的影响

Influence of irregular-void on transverse tensile mechanical properties of composites

本文主要研究分析了不规则形状孔隙对复合材料单向板横向拉伸力学性能的影响。首先通过C++编写不规则孔隙随机分布算法。然后通过Python参数化生成包含随机分布纤维和不规则孔隙的重复胞元(Repeating unit cell,RUC)。最后使用有限单元法(Finite element method)分析研究了不规则孔隙对单向板横向拉伸性能(横向弹性模量和横向拉伸强度)的影响。研究结果显示,孔隙的形状会影响单向板的初始损伤、损伤扩展和最终破坏。随着孔隙率的增大,横向弹性模量和横向拉伸强度都减小。相对于横向弹性模量,孔隙率对横向拉伸强度的影响较大。

The effect of irregular-void on transverse tensile properties of unidirectional fiber-reinforced composites was studied.Firstly,irregular-void random algorithms were programmed by C++.Secondly,the repeating unit cell(RUC)of the composites microstructure with random fibers and irregular-void was generated by Python.Then,the effect of irregular-void on transverse modulus and transverse tensile strength of unidirectional composites was simulated by the finite element method(FEM).It is found that void shape affects the initial damage,damage evolution and final damage of RUC.As void content increases,both transverse modulus and transverse tensile strength decrease.The effect of void content on transverse tensile strength is larger than on transverse modulus.