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

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

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

机构地区：[1]State Key Laboratory of Materials Processing and Die&Mould Technology,School of Material Science and Technology,Huazhong University of Science and Technology,Wuhan,430074,China

出　　处：《Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers)》2023年第1期47-54,共8页中国机械工程学报（增材制造前沿）（英文）

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).

摘　　要：Light-weight,high-strength metamaterials with excellent specific energy absorption(SEA)capabilities are sig-nificant for aerospace and automobile.The SEA of metamaterials largely depends on the material and structural design.Herein,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 materials.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 GBPM.The 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 studies.These findings can guide the design of metamaterials with high energy absorption to resist external impacts.

关 键 词：Bionic design Functionally graded design Specific energy absorption 3D printing 

分 类 号：TB3[一般工业技术—材料科学与工程] TP391.73[自动化与计算机技术—计算机应用技术]