With the resurgence of natural fibers as a viable alternative to synthetic fibers, there is a need to study their mechanical behaviour under different modes of loading. In this research, flax/epoxy composite laminates were manufactured and tested under low velocity impact loading to study the damage development on the laminates and assess their capability for low velocity impact applications. The laminates were tested using a pendulum-type impact apparatus. Two composite laminate configurations were tested: a symmetric unidirectional flax/epoxy laminate with stacking sequence [0]_8S and a symmetric cross-ply flax/epoxy laminate with stacking sequence [0/90]_4S. The unidirectional laminate exhibited poor and brittle behaviour under impact loading, with an energy penetration threshold of 10 J and an impact toughness of 34 kJ/m². On the other hand, the cross-ply laminate showed better impact performance, with its energy penetration threshold and impact toughness being three and 2.5 times higher than that of the unidirectional laminate, respectively.

随着天然纤维作为合成纤维的可行替代品的回潮，有必要研究其在不同载荷模式下的机械性能。在这项研究中，亚麻/环氧树脂复合层压板的制造和测试是在低速冲击载荷下进行的，以研究层压板上的损伤发展并评估其在低速冲击应用中的能力。使用摆式冲击装置测试层压板。测试了两种复合层压板配置：堆叠顺序为[0] _8S的对称单向亚麻/环氧树脂层压板和堆叠顺序为[0/90] _4S的对称交叉单层亚麻/环氧层压板。单向层压材料在冲击载荷下表现出较差的脆性，能量渗透阈值为10 J，冲击韧性为34 kJ / m ²。另一方面，交叉层压材料表现出更好的冲击性能，其能量渗透阈值和冲击韧性分别比单向层压材料高三倍和2.5倍。