一种新式压/拉一体式Hopkinson杆装置研究  

A New Type of Pressure/Tensile Integrated Hopkinson Bar

作　　者：王凡 陈龙洋 赵思晗 吴倩 郭伟国[1] WANG Fan;CHEN Longyang;ZHAO Sihan;WU Qian;GUO Weiguo(School of Aeronautics,Northwestern Polytechnical University Xi′an,710072,China)

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《振动．测试与诊断》2023年第5期886-894,1036,共10页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(11872051,12072287)。

摘　　要：分离式Hopkinson杆装置常用于测量材料动态压缩、拉伸和剪切性能,为了提高装置的高效性和经济性,研究了可以实现材料动态压缩和拉伸的一体式Hopkinson杆装置。首先,通过在Hopkinson压杆装置上增加Y字型前端构件、双侧杆和Y字型后端构件,将撞击产生的压缩波转换为拉伸波加载至试样;其次,通过ABAQUS软件数值仿真,分析各构件的几何构型、尺寸等对加载波形的影响。结果表明:前端Y字型构件分岔角度越大、截面尺寸越小,则因弯曲导致的波形失真的程度越严重,截面尺寸和失真程度成负指数关系;在侧杆截面边长大于10 mm时,侧杆间距对波形的影响较小;后端构件的法兰厚度越大,拉伸加载波的平均幅值越大。最终确定了前端构件的Y型分岔夹角为10°,2根侧杆的间距为60 mm,后端构件的法兰厚度为10 mm,构建了一种兼顾压缩和拉伸的一体式Hopkinson杆装置,并对2种试样分别进行压缩和拉伸加载,验证了此装置的有效性。Split Hopkinson bar equipment is an important method for measuring the dynamic properties of materials.In order to improve the efficiency and economic efficiency of the equipment,a kind of integrated Hopkinson bar device which can realize both material dynamic compression and tension is studied.By adding a Yshaped front component,a pair of side bar and Y-shaped back component to the split Hopkinson pressure bar equipment,the compression wave generated by impact can be converted into a tensile wave which loads on samples.Using ABAQUS software,a numerical simulation is conducted to analyze the change of waveform which is influenced by geometric configuration of front and back components,including the size and distance of side bars.The results show that the bifurcation angle increase the front Y-shaped component and the decrease of the cross-section size aggravate waveform distortion.The section size has a negative exponential relationship with the distortion degree.When the length of the side bars section is greater than 10 mm,the distance between side bars has little effect on the waveform.The tensile wave amplitude is positively correlated with the flange thickness.Finally,it is determined that the bifurcation angle of the front component is 10°,the distance between side bars is 60 mm,and the flange thickness of the back component is 10 mm.Therefore,a kind of integrated Hopkinson bar device that applies to both compression and tensile is established,and the compression and tensile loading experiments of two samples are respectively carried out to verify the effectiveness and stability of this device.

关 键 词：HOPKINSON杆 拉/压一体 尺寸优化 弯曲杆 动态性能 

分 类 号：O347.3[理学—固体力学]