材料科学
选择性激光熔化
复合材料
辅助
多孔性
可控性
偏移量(计算机科学)
格子(音乐)
机械
微观结构
计算机科学
数学
应用数学
声学
物理
程序设计语言
作者
Fei Liu,Tingdong Zhou,Tao Zhang,Haiqiong Xie,Yichuan Tang,Pan Zhang
标识
DOI:10.1016/j.matdes.2022.110630
摘要
Additive manufacturing has enabled surface-based sheet lattice to emerge as a new mechanical metamaterial with exceptional weight specific strength properties and multifunction. A novel design method of shell offset has been developed here for enhancement of mechanical properties and domain controllability of separated spaces by sheet lattice. Using selective laser melting, Ti6Al4V lattice samples were fabricated for compression experiments, followed by Micro-CT reconstruction. Manufacturing deviations with mean values of statistical analysis were taken into numerical simulations for prediction of mechanical properties. Investigation results show that increasing the shell offset is an effective strategy to improve mechanical properties and energy absorption of sheet lattices by more than 200% competing with net lattices, which is attributed to the higher second moment of area and successive layer-by-layer deformation mechanism of optimized unit type. In addition, a feasible adjustment region of 30–55% has been found, in which spatial volume fraction of the two independent void phases can be controlled for flow regulation of heat exchange without changing their mechanical properties. Those design concepts of sheet lattices will be valuable in future thermal management applications with lightweight protection.
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