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。 Through the establishment of a two-dimensional finite element model, the change of the fiber deformation area of ​​the preform due to the embedding of the Pin pin during the Z-pinning reinforcement process was studied. The shape and size of the substrate enrichment area caused by the process and the local fiber direction Changes and non-uniform fiber content distribution of the characteristic parameters, get the fiber non-uniform distribution of the law. Based on this, the influences of pins with different diameters on the in-plane microstructure of the laminate were simulated. The results show that the change of pin diameter has a great influence on the enrichment zone of matrix. The deflection angle and fiber volume of local fiber increase with the increase of pin diameter, but the maximum value does not change obviously.