基于NiTi合金的仿生防护结构自恢复特性  

Restore characteristics of NiTi alloy bionics protective self⁃repairing structure

作　　者：于征磊 郭雪[2] 董新桔 王协彬 金敬福[2] 张晓龙[1,2] 闫维 YU Zheng-lei;GUO Xue;DONG Xin-ju;WANG Xie-bin;JIN Jing-fu;ZHANG Xiao-long;YAN Wei(Key Laboratory of Bionic Engineering,Ministry of Education,Jilin University,Changchun 130022,China;College of Biological and Agricultural Engineering,Jilin University,Changchun 130022,China;School of Materials Science and Engineering,Shandong University,Jinan 250100,China;Beijing Huashengyang Hi-Tech Co.,Beijing 100029,China)

机构地区：[1]吉林大学工程仿生教育部重点实验室,长春130022 [2]吉林大学生物与农业工程学院,长春130022 [3]山东大学材料科学与工程学院,济南250100 [4]北京华盛扬科技有限公司,北京100029

出　　处：《吉林大学学报（工学版）》2020年第3期1138-1143,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重点研发计划项目(2018YFB1105100);国家自然科学基金面上项目(51975246);吉林省省校共建计划专项项目(SXGJSF2017-2-4);中国博士后基金项目(2016M590256);吉林大学高层次科技创新团队建设项目(2019TD-34).

摘　　要：借鉴猫科动物脚掌肉垫具有负泊松比结构的缓冲吸能特性,运用结构仿生学原理设计了仿生防护自恢复结构。利用NiTi形状记忆合金超弹性特性和负泊松比结构优异的力学性能,建立了简化的仿生防护自恢复模型,利用LS-DYNA对该模型进行了动态压缩特性和恢复特性模拟分析。同时,利用NiTi形状记忆合金材料制备仿生结构样件,并进行了动态压缩试验测试。结果表明:仿生结构样件在1200 N压力范围内,可实现受压变形后自激恢复的特性;NiTi合金仿生防护结构在压缩载荷的作用下具有优异的变形吸能和自恢复回弹特性;仿真分析结果与试验结果较为符合,较准确地模拟了样件在动态压过程中的变形特性及承载特性。本文研究成果实现了压力载荷作用下仿生防护结构的自动回弹恢复功能,对提高防护装甲的抗冲击、自恢复特性提供了参考。The foot pads with negative poisson′s ratio structure of felines have the buffering and energy absorption functions,which have inspired the design of bionic protective self-repairing structure.In this paper,the superplastic properties of NiTi alloy and its mechanical properties of negative poisson′s ratio structure are employed to establish the bionic protective self-repairing model.The compression and restoration characteristics of the model are simulated and analyzed by using LS-DYNA simulation software. The test samples were fabricated by strip NiTi alloy,and dynamic compression tests wereconducted. The dynamic compression results show that within the range of 1200N,the samples can realizeself-excitation recover after compression. The bionic protective structure of NiTi alloy has excellentdeformation energy absorption and self-recovery properties under compression load. The simulation resultsare in good agreement with the experimental results. The research results demonstrate the good impactresistance and self-recovering properties of the designed bionic structure,which may provide reference toimprove the endurance and material utilization rate of the total range of armor.

关 键 词：工程仿生学 仿生防护结构 NITI合金 压缩特性 恢复特性 数值模拟 

分 类 号：TB17[生物学—生物工程]