Design and 3D Printing of Graded Bionic Metamaterial Inspired by Pomelo Peel for High Energy Absorption

作     者：Zhi Zhang Bo Song Junxiang Fan Xiaobo Wang Shuaishuai Wei Ruxuan Fang Xinru Zhang Yusheng Shi 

作者机构：State Key Laboratory of Materials Processing and Die&Mould TechnologySchool of Material Science and TechnologyHuazhong University of Science and TechnologyWuhan430074China 

出 版 物：《Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers)》 (中国机械工程学报（增材制造前沿）（英文）)

年 卷 期：2023年第2卷第1期

页      面：47-54页

学科分类：080805[工学-电工理论与新技术] 080904[工学-电磁场与微波技术] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：supported by Guangdong Provincial Key-Area Research and Development Program of China(Grant No.2020B090923001) National Natural Science Foundation of China(Grant Nos.51922044,52205358) Central Universities Funda-mental Research Funds of China(Grant No.HUST:2022JYCXJJ021) 

主　　题：Bionic design Functionally graded design Specific energy absorption 3D printing 

摘      要：Light-weight,high-strength metamaterials with excellent specific energy absorption(SEA)capabilities are sig-nificant for aerospace and *** SEA of metamaterials largely depends on the material and structural ***,inspired by the superior impact resistance of pomelo peel for protecting the pulp and the elevated SEA ability of a functionally graded structure,a graded bionic polyhedron metamaterial(GBPM)was designed and realized by 3D printing using a soft material(photosensitive resin)and a hard material(Ti-6Al-4V).Guided by compression tests and numerical simulations,the elevated SEA ability was independent of the *** fluctuation region appeared in hard-material-fabricated bionic polyhedron metamaterial(BPMs)and was absent in soft-material-fabricated BPMs in the stress-strain curves,resulting in the growth rate of the SEA value of the soft-material-fabricated GBPM being enhanced by 5.9 times compared with that of the hard-material-fabricated *** SEA values of soft-and hard-material-fabricated GBPM were 1.89 and 44.16 J/g,which exceed those of most soft-and hard-material-fabricated metamaterials reported in previous *** findings can guide the design of metamaterials with high energy absorption to resist external impacts.