Abstract The present work focuses on an experimental investigation on the efficiency of the Z-pin pre-hole insertion technique in minimizing the in-plane damage while improving the delamination resistance of quasi-isotropic carbon fibre/epoxy laminates. The results indicate that the Z-pin pre-hole insertion causes much less crimped and/or broken fibres leading to a minimal strength reduction of 3.50% in tension and 4.80% in compression respectively for composite laminates containing 1 vol.% of carbon Z-pins. The Mode-I fracture toughnesses of the composites reinforced with ~1 vol.% carbon and Kevlar Z-pins are about 12 times higher than that of the control samples, suggesting an efficient crack arrest mechanism by the implanted pins. The substantially enhanced through-thickness properties together with the minimal reduction in in-plane performance warrant the pre-hole insertion technique as a practical method in mitigating the delamination in fibre reinforced laminates.

中文翻译：

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通过预孔销插入过程最大限度地减少 Z 型销复合层压板的面内损坏

摘要 目前的工作重点是对 Z-pin 预孔插入技术在提高准各向同性碳纤维/环氧树脂层压板的抗分层性的同时最大限度地减少面内损伤的效率的实验研究。结果表明，对于含有 1 vol.% 碳 Z- 的复合层压板，Z 销预孔插入导致更少的卷曲和/或断裂纤维，导致拉伸强度降低 3.50% 和压缩强度降低 4.80%。针脚。用~1 vol.% 碳和 Kevlar Z 销增强的复合材料的 I 型断裂韧性比对照样品高约 12 倍，表明植入销具有有效的止裂机制。