This paper presents the quasi-static crush performance of newer resin-infused thermoplastic 3D fibre reinforced composites (FRC) under axial load. The main objective is to make an assessment of the energy absorption capability of novel 3D composites for improved energy absorbing applications. Flat specimens of resin-infused thermoplastic (TP) and thermoset (TS) 3D composites with three trigger angles, i.e., 15°, 30° and 45° were tested under quasi-static crush loads. The thermoplastic 3D-FRC at 45° trigger angle demonstrated 31% higher specific energy absorption (SEA), and 17% higher average crushing stress. This improved performance is attributed to higher fragmentation failure mechanisms, which absorbed more energy. These results elucidate that the resin-infused thermoplastic composites are suitable for higher energy absorption and lightweight design for automotive and sports applications.

本文介绍了新型树脂注入热塑性3D 纤维增强复合材料 (FRC) 在轴向载荷下的准静态压碎性能。主要目标是评估新型 3D 复合材料的能量吸收能力，以改善能量吸收应用。树脂注入的热塑性塑料 (TP) 和在准静态挤压载荷下测试了具有三个触发角，即 15°、30° 和 45° 的热固性 (TS) 3D 复合材料。45° 触发角的热塑性 3D-FRC 表现出比能量吸收 (SEA) 高 31%，平均压碎应力高 17%。这种改进的性能归因于更高的碎片故障机制，它吸收了更多的能量。这些结果表明，树脂注入的热塑性复合材料适用于汽车和运动应用的更高能量吸收和轻量化设计。