This study explored the impact response of two bio-inspired composite laminates with linear and non-linear helicoidal fibre architectures. The helicoidal laminates, together with quasi-isotropic and cross-ply control samples, were fabricated using heterocyclic aramid fibres and tested against a spherical projectile under high impact velocities. The results revealed that helicoidal lay-ups with small rotation angles led to inferior perforation resistance and energy absorption capacity when compared to the quasi-isotropic and cross-ply counterparts. The cross-ply configuration was confirmed as the optimal fibre architecture for impact perforation. Post-impact inspections highlighted that the failure mechanisms of laminates were significantly affected by their lay-ups. The number of fractured fibres was found to reduce with the decrease of inter-ply angle. This was due to the small rotation angles promoted a wedge-in mechanism. Moreover, a smaller angle mismatch resulted in diminished overall delamination area in a laminate. Due to these two effects, therefore, helicoidal lay-up configurations with small inter-ply angles are not recommended for impact-resistant laminates reinforced by tough fibres.

本研究探讨了两种具有线性和非线性螺旋纤维结构的仿生复合层压板的冲击响应。使用杂环芳纶纤维制造螺旋层压板以及准各向同性和交叉层控制样品，并在高冲击速度下对球形射弹进行测试。结果表明，与准各向同性和交叉层的对应物相比，具有小旋转角度的螺旋状叠层导致较差的抗穿孔性和能量吸收能力。交叉层配置被确认为用于冲击穿孔的最佳纤维结构。冲击后检查强调，层压板的失效机制受到其叠层的显着影响。发现断裂纤维的数量随着层间角度的减小而减少。这是由于小旋转角度促进了楔入机制。此外，较小的角度失配会导致层压板的整体分层面积减少。因此，由于这两种影响，不建议将具有小层间角度的螺旋叠层配置用于由坚韧纤维增强的抗冲击层压板。