增材制造镍钛仿生结构缓冲吸能及自恢复特性研究

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摘要蜂窝结构由于具有优异的可设计性、剪切模量、断裂韧性、抗冲击吸能等特性，在车辆碰撞、卫星着陆、军事装备等吸能结构设计和多功能优化方面具有巨大的应用潜力。以普通内凹蜂窝结构为基础，运用结构仿生学原理进行了仿生优化设计，建立了内凹蜂窝结构和仿花生壳结构的三维负泊松比承载结构，并利用有限元分析软件LS-DYNA进行数值仿真分析。同时以NiTi形状记忆合金这种有独特的形状恢复行为、低刚度、高强度、超弹性的材料为基材，运用选区激光融化技术制备了两种仿生结构样件，并对样件进行了准静态压缩试验。通过对比试验测试结果与数值仿真结果得出，两种结构在吸能减震方面均有着较好的应用前景。其中，3D仿花生壳承载结构有着更好的吸能承载特性。两种结构在5次13%的循环压缩试验后，经过水浴加热后均可达到99%以上的形状恢复效率，为未来具有自恢复功能的缓冲结构的设计提供了参考。
关键词：工程仿生学；仿生结构设计；增材制造；负泊松比；准静态压缩；数值模拟

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	于征磊1
	2
	信仁龙2
	陈立新2
	郭雪2
	朱奕凝3
	张志辉2
	徐泽洲2
	梁平2
	赵杰亮4

关键词 ：工程仿生学, 仿生结构设计, 增材制造, 负泊松比, 准静态压缩, 数值模拟

Abstract：Honeycomb structure has great application potential in vehicle collision, satellite landing, military equipment and other energy-absorbing structure design and multi-functional optimization due to its excellent design ability, shear modulus, fracture toughness, impact resistance and energy absorption. Based on the common reentrant honeycomb structure, bionic optimization design was carried out using the structure of bionics principle, has established two kinds of 3D negative poisson’s ratio of bearing structure, as well as two structures corresponding finite element model (3D reentrant honeycomb structure and 3D imitation of peanut shell structure), and by using finite element analysis software ls-dyna numerical simulation analysis. NiTi shape memory alloy, which has unique shape recovery behavior, low stiffness, high strength and hyperelasticity, was used as the base material to prepare samples. The samples prepared by Selective laser melting technology were subjected to quasi-static compression tests. By comparing the test results with the numerical simulation results, it is concluded that the two structures have good application prospects in energy absorption and shock absorption. Among them, the 3D imitation peanut shell bearing structure has better energy absorption and bearing characteristics. After 5 times of 13% cyclic compression experiments, the two structures can achieve a shape recovery efficiency of more than 99% after heating in a water bath, which provides a reference for the design of a buffer structure with self-recovery function in the future.
Key words: Engineering Bionics; Bionic structure design; Additive manufacturing; Negative Poisson's ratio; Quasi static compression; The numerical simulation

Key words： Engineering Bionics Bionic structure design Additive manufacturing Negative Poisson's ratio Quasi static compression The numerical simulation

收稿日期: 2021-06-02 出版日期: 2022-11-15

引用本文:

于征磊1,2,信仁龙2,陈立新2,郭雪2,朱奕凝3,张志辉2,徐泽洲2,梁平2,赵杰亮4. 增材制造镍钛仿生结构缓冲吸能及自恢复特性研究[J]. 振动与冲击, 2022, 41(21): 279-285.
YU Zhenglei1,2, XIN Renlong2, CHEN Lixin2, GUO Xue2, ZHU Yining3, ZHANG Zhihui2, XU Zezhou2, LIANG Ping2, ZHAO Jieliang4. Buffer energy absorption and self-recovery characteristics of NiTi bionic structure fabricated with additive manufacturing. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(21): 279-285.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I21/279

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