摘要
基于经典三波法理论,提出了一种适用于分离式霍普金森拉杆实验装置的动态拉伸变形测量修正方法。该方法可有效避免入射杆、透射杆和试件之间的螺纹连接以及过渡段对拉伸试验结果造成的信号干扰。同时用LY12铝合金进行了霍普金森杆动态拉伸与压缩(SHTB/SHPB)试验,采用所提出的修正方法对LY12铝合金动态拉伸试验变形数据进行了修正;经过与压缩试验结果的比较分析验证了该文所提修正方法的合理性与适用性,并据此对拉伸试件外形给出了建议。
Based on the classical three-wave method theory of the SHPB/SHTB device, a correction method for the dynamic tensile deformation measurement is proposed. The method can effectively avoid the signal interference caused by the threaded connection and transition part between the incident （transmitted） bar and the specimen. Dynamic tensile and compressive experiments of LY12 Aluminum alloy were carried out with the split Hopkinson bar devices. The method is used to correct the dynamic tensile test results for LY12 Aluminum alloy, and then the corrected tensile results are compared with the compressive ones. It is proved that this method is reasonable, feasible and practical. And the optimal size of tensile specimen is derived.
出处
《工程力学》
EI
CSCD
北大核心
2013年第7期276-281,293,共7页
Engineering Mechanics
基金
国家自然科学基金项目(90715041
51209094)
中国博士后科学基金项目(2011M500334)
关键词
霍普金森杆
螺纹连接
过渡段
变形测量
修正方法
Hopkinson bar
threaded connection
transition part
deformation measurement
correction method
