Energy absorption diagram characteristic of metallic self-supporting 3D lattices fabricated by additive manufacturing and design method of energy absorption structure

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:226

Article

Zhang, Hairi^1,2  Zhou, Hao^3,5  Zhou, Zuoxin³  Zeng, Huizhong³  Zhang, Xiaoyu³  Yang, Jianzhong³  Lei, Hongshuai⁴  Han, Fusheng¹ 

[1] Chinese Acad Sci, Hefei Inst Phys Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

[2] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China

[3] China Acad Space Technol, Beijing Inst Spacecraft Syst Engn, Beijing Key Lab Intelligent Space Robot Syst Tech, Beijing 100094, Peoples R China

[4] Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China

[5] Xi An Jiao Tong Univ, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Peoples R China

关键词: Lattice structures;    Energy absorption diagram;    Finite element analysis;    Compression behavior;    Selective laser melting;   

DOI  :  10.1016/j.ijsolstr.2021.111082

来源: Elsevier

【 摘 要 】

Three-dimensional lattice structures have the advantages of light-weight and strong design ability, and have good prospects in the application for energy absorption. However, there are seldom design methods of three-dimensional lattice structures for energy absorption, especially a three-dimensional lattice structure design method for energy absorption based on energy absorption diagrams has not yet been proposed. The present study establishes a mechanical theoretical model of self-supporting lattice structures for additive manufacturing. The aluminum alloy self-supporting lattice structures are fabricated by selective laser melting (SLM). An improved characterization method on energy absorption diagram is proposed. Energy absorption diagram of self-supporting lattice structures is established based on finite element analysis (FEA) and uniaxial compression experiments. The results show that the envelope lines of shoulder points of three-dimensional lattice structures with various configurations are different, which varies from the foams. A design method of three-dimensional lattice structures for energy absorption is proposed for the first time on the basis of this energy absorption diagram, which is of great significance for the design of energy-absorbing structures in the fields of aerospace, aviation and transportation. (c) 2021 Elsevier Ltd. All rights reserved.

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