Z-pins can enhance through-thickness direction of composite laminates effectively by reducing the delamination damage area. In this paper, the low velocity impact behaviors of [0₂/90₂]_4S cross-ply composite laminates by inserting Z-pins with two different angle 0° and ±45° along the thickness direction were compared. T300 carbon fiber Z-pins were used as the reinforcements for Z-pinned laminates impacted by 5 J, 10 J, 20 J and 30 J impact energies. The mechanical responses including the impact force-time/central displacement curves were recorded during the tests. Afterwards, ultrasonic C-scanner, scanning electron microscope (SEM) and X-ray micro-computed tomography (μCT) techniques were used to characterize the impact damage. Experimental results demonstrated that the Z-pins were unable to delay the delamination initiation, which led to basically consistent delamination initiation threshold regardless of Z-pin inclined angle. Based on the mechanical characteristics, 0° Z-pinning could improve the resistance to the onset of penetration by comparing to the ±45° Z-pinning. In addition, the effectiveness of 0° Z-pinning on suppression of delamination damage and internal defects was better than the ±45° Z-pinning at high impact energy.

Z销可通过减少分层破坏面积来有效地增强复合材料层压板的厚度方向。在本文中，[0的低速冲击行为₂ /90 ₂ ] _4S比较了通过沿厚度方向插入两个角度分别为0°和±45°的Z形销制成的多层复合层压板。T300碳纤维Z销用作受5 J，10 J，20 J和30 J冲击能量冲击的Z钉层压板的增强材料。在测试过程中记录了包括冲击力-时间/中心位移曲线在内的机械响应。之后，使用超声波C扫描仪，扫描电子显微镜（SEM）和X射线微计算机断层扫描（μCT）技术来表征冲击损伤。实验结果表明，无论Z销倾斜角度如何，Z销都无法延迟分层起始，这导致了基本一致的分层起始阈值。根据机械特性，与±45°Z钉扎相比，0°Z钉扎可以提高对穿透渗透的抵抗力。此外，在高冲击能量下，0°Z钉扎抑制脱层损伤和内部缺陷的有效性优于±45°Z钉扎。