Numerical and experimental studies on compressive behavior of Gyroid lattice cylindrical shells

被引:120
作者
Wang, Yongzhen [1 ,4 ]
Ren, Xianben [1 ]
Chen, Zihao [2 ]
Jiang, Yongbo [2 ]
Cao, Xiaofei [1 ]
Fang, Shizheng [3 ]
Zhao, Tian [1 ,2 ]
Li, Ying [1 ,2 ]
Fang, Daining [1 ,2 ]
机构
[1] Beijing Inst Technol, Inst Adv Struct Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China
[2] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China
[3] China Univ Min & Technol, Sch Mech & Civil Engn, Beijing, Peoples R China
[4] Tsinghua Univ, Sch Aerosp Engn, Beijing, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Gyroid lattice cylindrical structure; Energy absorption; Triply periodic minimal surfaces; Quasi-static compression; ENERGY-ABSORPTION CHARACTERISTICS; MECHANICAL-PROPERTIES;
D O I
10.1016/j.matdes.2019.108340
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper, Gyroid lattice cylindrical shell (LCS) specimens were designed by a newly proposed mapping methodology and were fabricated by selective laser melting (SLM) technology. Their energy absorption and deformation modes were investigated through quasi-static compression tests. A finite element model (FEM) was proposed, which was validated by the experimental results, for a further study on the compressive behavior of the Gyroid LCS. Based on the numerical study, it was found that Gyroid LCS showed superior energy absorption to the hexagonal LCS and triangular LCS with the same density. In addition, a parametric study indicated that main energy absorption factors, namely total energy absorption, specific energy absorption and mean crushing load, were in power function relationship with the relative density. Finally, it was found that thickness gradient and geometric gradient had significant effects on the failure modes of Gyroid LCS under compression. The research in this paper is expected to provide some guidance for the design of energy absorption devices or structures. (c) 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
引用
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页数:11
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