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相变柱壳的径向冲击特性
引用本文:唐志平,张会杰.相变柱壳的径向冲击特性[J].爆炸与冲击,2013,33(1):47-53.
作者姓名:唐志平  张会杰
作者单位:中国科学技术大学近代力学系中国科学院材料力学行为和设计重点实验室,安徽合肥,230026;中国科学技术大学近代力学系中国科学院材料力学行为和设计重点实验室,安徽合肥,230026
基金项目:国家自然科学基金项目(10872196)~~
摘    要:采用改进的SHPB (split Hopkinson pressure bar)装置和高速CCD (charge-coupled device)相机对TiNi合金圆柱壳进行了径向冲击实验研究,得到了动态载荷-位移曲线,并采用数字边界提取技术和纯弯曲假定对结构的动态全场变形过程进行了定量分析。结果表明,相变柱壳经受动态冲击后可以恢复,其加、卸载非线性行为与相变状态和相变铰的演化相关。同时,该结构具有良好的横向抗冲效应,对冲击加速度和冲击载荷的衰减量达到95%以上,耗能率为42.4%,可望在可重复使用的抗冲装置中得到应用。

关 键 词:爆炸力学  冲击响应  SHPB  TiNi柱壳  抗冲吸能  马氏体相变  相变铰

Radial impact responses of cylindrical shells with phase transformation
Tang Zhi-ping , Zhang Hui-jie.Radial impact responses of cylindrical shells with phase transformation[J].Explosion and Shock Waves,2013,33(1):47-53.
Authors:Tang Zhi-ping  Zhang Hui-jie
Affiliation:1.(CAS Key Laboratory of Mechanical Behavior and Design of Materials, 
Abstract:The radial impact responses of TiNi alloy cylindrical shells with phase transformation were investigated experimentally by using a modified split Hopkinson pressure bar (SHPB) apparatus and a high-speed charged-coupled device (CCD) camera. The dynamic load-displacement curves of the structure were obtained. Based on the pure bending assumption, the dynamic deformation process of the whole structure was analyzed quantitatively by adopting the digital pickup technique. The results show that a cylindrical shell with phase transition can recover its original shape after impact, its nonlinear loading-unloading behavior is related to the state of phase transition and the evolution of phase transition hinges. Meanwhile, this structure has a fine radial shock resistance effect, the impact acceleration and load can be attenuated to less than 5% and the rate of energy dissipation is 42.4%, and it is hopefully applied in the shock absorber devices subjected to multiple impacts.
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