Compressive response and energy absorption of additive manufactured Ti-6Al-4V triply periodic minimal surface honeycomb structure

小旋翼机 材料科学 蜂巢 复合材料 蜂窝结构 选择性激光熔化 抗压强度 吸收(声学) 压缩(物理) 扫描电子显微镜 变形(气象学) 微观结构 共聚物 聚合物
作者
Hailun Zhou,Miao Zhao,Naihui He,Tao Zhang,Xiangyu Ma,David Z. Zhang
出处
期刊:Journal of Alloys and Compounds [Elsevier BV]
卷期号:: 173744-173744 被引量:2
标识
DOI:10.1016/j.jallcom.2024.173744
摘要

This study proposed a design method of honeycomb structure based on triply periodic minimal surfaces (TPMS), namely gyroid-honeycomb. The honeycomb samples were fabricated by selective laser melting (SLM) with Ti6Al4V (TC4) material. Through the uniaxial quasi-static compression tests and numerical simulations, the mechanical responses and energy absorption capability of honeycomb structures under different compressive velocities were investigated. Compared with conventional truss-honeycomb structure, the gyroid-honeycomb exhibited reduced stress fluctuation and enhanced energy absorption capability under in-plane compressive direction. Particularly, gyroid-honeycomb also demonstrated a superior energy absorption capability under both low and high compressive velocities. According to the scanning electron micrograph (SEM) image of the fracture surface, the gyroid-honeycomb exhibited a unique buckling failure mode along with a large plastic deformation and negative Poisson’s ratio. The different compressive responses can be attributed to the distinct stress distribution in gyroid-honeycomb according to the simulation results. Notably, the gyroid-honeycomb structure displayed a remarkable capacity for energy absorption across various compressive velocities. These findings provide valuable insights into the application of the novel TPMS-based honeycomb structures in enhancing the crashworthiness protection for vehicles.
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