高速冲击拉伸试验装置的研制  

Development of High-Speed Tensile Impact Tester

作　　者：韦习成[1] 李麟[1] 符仁钰[1] 史文[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《机械科学与技术》2005年第7期844-847,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：上海市教委基金项目(03K027);上海市科委自然科学基金项目(03ZR14035)资助

摘　　要：基于一维弹性应力波原理和分离式Hopkinson拉杆实验方法,将新颖的气动加载活塞式结构与具有“机械滤波”思想的前置金属短杆断裂的间接杆杆型结构相结合成功地研制了气动式间接杆杆型冲击拉伸试验装置,并对影响试样变形速率的因素进行了研究。结果表明,上述结构能够获得较理想的一维弹性应力波和102/s～103/s的应变率。The pneumatic tensile impact tester was developed on the basis of both one-dimensional elastic stress wave theory and split Hopkinson tensile bar (SHTB) experimental method. The idea of “mechanical wave filtration” and the structure of indirect bar-bar connection were used in the design by the fracture of short metal bar. The effects of experimental parameters, such as the length and diameter of short metal bar, gas pressure on the strain rate were studied. It is concluded that the good one-dimensional stress wave and the range of strain rate 10 2/s～10 3/s are obtained.

关 键 词：应力波 气动式 冲击拉伸 应变率 

分 类 号：U46[机械工程—车辆工程]