International Journal of Crashworthiness ( IF 1.9 ) Pub Date : 2020-06-10 Mohammad Tafazoli, Mohammad Damghani Nouri
This paper focuses on the energy absorption of additively-manufactured or 3D-printed lattice-core sandwich structures of different configurations. The rhombic dodecahedron lattice unit cell, which has been extensively investigated for energy absorption, is the starting point for this research. The compressive behaviour of 3D lattice structures with rhombic dodecahedron unit cells was examined at quasi-static loading along with the influence of the angle between struts, struts diameter, and the number of layers in the core. The angle between struts had the highest degree of influence on the specific energy absorption. The results showed that the diameter of struts has been the most influential parameter to increase mean and peak forces. The results of using the design expert software showed the optimal specific energy absorption and peak force to be 3.8779 J/gr and 3458.25 N, respectively.
中文翻译:
三维印刷晶格芯夹心结构准静态压缩试验的实验和数值研究及多目标优化
本文重点研究不同构造的增材制造或3D打印的晶格芯三明治结构的能量吸收。菱形十二面体晶格晶胞已经被广泛研究以吸收能量,是这项研究的起点。在准静态载荷下,研究了带有菱形十二面体晶胞的3D晶格结构的压缩行为,以及支杆之间的角度,支杆直径和芯层数的影响。支柱之间的角度对比能量吸收的影响程度最高。结果表明,支柱直径一直是增加平均力和峰值力的最有影响的参数。