软硬交错金属空心球泡沫动力学性能研究
DYNAMIC PERFORMANCE OF 3D METAL-HOLLOW-SPHERE FOAMS WITH SOFT-HARD SPHERES
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摘要: 通过控制点阵结构中不同阵点位置空心球的软硬程度建立了交错金属空心球泡沫模型。在此基础上,对比研究了不同冲击条件下,均匀和各种交错金属空心球泡沫的动力学响应特性。重点分析了软硬空心球排布方式对金属空心球泡沫动力学性能的影响。研究结果表明,通过对软硬空心球排布方式的控制,材料可以在一定范围内根据外载条件进行自主调节,以控制金属空心球泡沫内的应力分布,提高了金属空心球泡沫的能量吸收效率。软硬交错空心球模型的建立为实现金属空心球泡沫的自适应设计提供了新的思路。Abstract: 3D interleaved metal hollow sphere foams are established by controlling the stiffness of hollow spheres at different lattice points. The dynamic performances of uniform metal hollow sphere foams and mixed ones are investigated comparatively under different impact conditions. The emphasis is placed on the effects of the distribution pattern of soft and hard hollow spheres on the dynamic foam performance. The results show that by controlling the distribution of soft and hard hollow spheres, the stresses in the materials can adjust autonomously according to the impact condition, which results in an enhanced energy absorption efficiency. The 3D soft-hard sphere mixed metal-hollow-sphere foam provides some useful guidance in the adaptive design of metal-hollow-sphere foams.