Abstract The ceramic particle reinforced foam-filled carbon fiber reinforced composites sandwich unit cell subjected to quasi-static and dynamic compressions are studied experimentally. The weight fraction of the ceramic particle is discussed to analyze its effect on the failure and energy absorption of the composite cells. The results show that the failure modes and energy absorption mechanisms of the cell are influenced significantly by the strain rate and ceramic particle reinforcement effects. The cluster of the particle makes the strut experience node failure under impulsive loadings, not the strut buckling and fracture shown at other cells. The mechanical property, especially the plateau stress, is enhanced noticeably as the foam is reinforced with the higher weight fraction of ceramic particles. The filling foams improve the impact resistance of the cells by transmitting less impulses and absorbing more energy. With a higher energy absorption efficiency, the foam-filled cell with higher weight fraction of ceramic particle has the highest energy absorption capacity under the quasi-static compression. Under the impulsive loading, the increasing ceramic particles can reduce the transmitted impulse, but cannot absorb additional energy.

中文翻译：

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陶瓷颗粒增强泡沫填充复合晶格芯的动态破坏

摘要 对陶瓷颗粒增强泡沫填充碳纤维增强复合材料夹心晶胞在准静态和动态压缩作用下进行了实验研究。讨论了陶瓷颗粒的重量分数，以分析其对复合电池失效和能量吸收的影响。结果表明，应变速率和陶瓷颗粒增强效应显着影响电池的失效模式和能量吸收机制。粒子簇使支柱在脉冲载荷下经历节点失效，而不是在其他单元中显示的支柱屈曲和断裂。机械性能，尤其是平台应力，显着增强，因为泡沫材料用更高重量分数的陶瓷颗粒增强。填充泡沫通过传递更少的脉冲和吸收更多的能量来提高细胞的抗冲击性。具有更高的能量吸收效率，陶瓷颗粒重量分数较高的泡沫填充单元在准静态压缩下具有最高的能量吸收能力。在脉冲载荷作用下，陶瓷颗粒的增加可以减少传递的脉冲，但不能吸收额外的能量。