中文摘要：

通过建立二维有限元模型,研究了Z-pinning增强工艺过程中Pin针的嵌入对预成型件纤维变形区域的改变,定量表征了工艺引起的基体富集区的形状和大小,以及局部纤维方向变化和纤维含量非均匀分布的特征参数,得到纤维非均匀分布的规律。在此基础上,模拟了不同直径的Pin针对层合板面内微观结构的影响规律。结果表明：Pin针直径的改变对基体富集区的影响较大;局部纤维偏转角和纤维体积含量随着Pin针直径的增大而增大,但其最大值变化不明显。

英文摘要：

Based on the 2D finite element model,changes of the fibre distortion region in the preform were investigated during the Z-pinning process.The shape and size of the resin zone were quantitatively characterized.Characteristic parameters of the fibre misalignment angle and the non-uniform distribution of local fibre content were made,and the rule of the fibre non-uniform distribution was obtained.On this basis,influence of the Pin diameter on the microstructure of the laminates was numerically analyzed.The results show that the Pin diameter has a great impact on the resin rich zone.The misalignment angle and fibre volume fraction increase with the Pin diameter,however,the maximum does not change significantly.