摘要
为满足复合材料的高应变率拉伸测试,对杆径为30mm分离式霍普金森拉杆实验装置进行改进。入射杆撞击端安装带螺纹的法兰用来生成拉伸波,在入射杆和透射杆与试件连接处采用两个带螺纹的试件接头装夹试件。基于ABAQUS显式算法数值仿真技术对改进后装置应力波的一维性以及试件应力均匀性进行研究。实验结果表明,改进后的装置更加有利于加工方便;试件的加工和装夹更加快捷,缩短了实验周期;改进后的装置模型满足SHTB实验一维应力波假设和试件应力均匀假设,能够满足复合材料高应变率拉伸实验要求。
To meet the high strain rate tensile test of the composites, the 30ram split Hopkinson tensile bar are modified. The threaded flange is set up on the incident bar to generate tensile wave, and two threaded joints are adopted to clamp specimen at the junction between incident bar and transmitted bar. Based on ABAQUS numerical simulation, the produce and spread process of the wave and the uniform stress of the specimen are tested detailedly. The results indicate that the modified equipment can be machined easier and the specimen can be clamped more quickly, what is more, the model of flange-bar threaded connection can produce one-dimensional tensile wave and the specimen achieve uniform stress in the specimen, and the soft composites is tested in this equipment.
出处
《计算机工程与设计》
CSCD
北大核心
2014年第2期593-597,共5页
Computer Engineering and Design
基金
中央高校基本科研业务费专项基金项目(NUST2011XQTR13)
关键词
高应变率
分离式霍普金森拉杆
数值仿真
一维应力波
应力均匀
high strain-rate
split Hopkinson tensile bar
numerical simulation
one-dimensional stress wave
uniform stress
