一种适合于Hopkinson杆的实验测试方法探索

傅华; 彭金华; 李俊玲; 唐孝容; 谭多望

doi:10.11858/gywlxb.2014.04.006

一种适合于Hopkinson杆的实验测试方法探索

doi: 10.11858/gywlxb.2014.04.006

傅华^{1, 2,},
彭金华²,
李俊玲^{1, 3},
唐孝容¹,
谭多望¹

1.
中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室，四川绵阳 621999
2.
南京理工大学化工学院，江苏南京 210094
3.
国防科学技术大学理学院工程物理研究所，湖南长沙 410073

基金项目: 国家自然科学基金(10902100);中国工程物理研究院科学技术基金重大项目(2009A0201008);冲击波物理与爆轰物理实验室基金(9140C6709021005, 9140C6709020907)

详细信息

作者简介:
傅华(1979-), 男, 博士研究生, 副研究员, 主要从事炸药安全性研究.E-mail:huafu_103@163.com

中图分类号: O521.3;O347.4
计量
- 文章访问数: 6503
- HTML全文浏览量: 2034
- PDF下载量: 270
出版历程
- 收稿日期: 2012-08-12
- 修回日期: 2012-09-21

A New Measurement Method Applied to Hopkinson Bar Experiment

1.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621999, China
2.
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
3.
Institute of Engineering Physics, College of Science, National University of Defense Technology, Changsha 410073, China

摘要

摘要: 低阻抗脆性材料的动力学性能日益受到人们的关注，但是由于其破坏应变小，透射信号弱，传统的Hopkinson杆测试技术往往难以获得准确的测量结果。为此，提出了一种适用于Hopkinson杆动态力学性能测试的新实验方法，即将激光微位移测量技术应用到入射杆和透射杆的端面速度测量中，实现了Hopkinson杆中试样应力-应变关系的直接测量。通过实验和数值模拟，验证了该方法的有效性。
- Hopkinson杆 /
- 激光微位移测量技术 /
- 动态力学性能
Abstract: There is an increasing attention in determining the dynamic mechanical properties of low-impedance and brittle materials, but it is difficult to acquire exact experimental results by a conventional Hopkinson pressure bar test because of their small failure strain and weak transmission strain signal.A new method applied to Hopkinson bar dynamic mechanics test was presented in this paper.The velocities of input and output bar ends were measured by the laser micro-displacement interferometer technology, and the stress-strain relation of sample was achieved by this method.The proposed method is validated through numerical simulation and experiment.
- Hopkinson bar /
- laser micro-displacement interferometer technology /
- dynamic mechanical property

HTML全文

图 1 激光微位移测量方法示意图

Figure 1. Schematic diagram of laser micro-displacement measurement method

下载: 全尺寸图片幻灯片

图 2 计算模型

Figure 2. Calculation model

下载: 全尺寸图片幻灯片

图 3 不同位置处的速度曲线对比

Figure 3. Comparison of velocity curves at different positions

下载: 全尺寸图片幻灯片

图 4 模拟计算结果与输入材料模型参数的对比

Figure 4. Comparison of simulation results

下载: 全尺寸图片幻灯片

图 5 验证实验装置示意图

Figure 5. Schematic of validation experiment

下载: 全尺寸图片幻灯片

图 6 激光微位移测量法测得的典型原始信号波形

Figure 6. Typical original signal recorded by the laser micro-displacement method

下载: 全尺寸图片幻灯片

图 7 3种方法获得的速度曲线对比

Figure 7. Comparison of velocities obtained by three methods

下载: 全尺寸图片幻灯片

图 8 输入杆和输出杆的端面速度曲线

Figure 8. Velocity curves of input and output bar ends

下载: 全尺寸图片幻灯片

图 9 应力曲线对比

Figure 9. Comparison of stress curves

下载: 全尺寸图片幻灯片

图 10 某PBX炸药的应力-应变曲线

Figure 10. Stress-strain curves of PBX explosive

下载: 全尺寸图片幻灯片

参考文献(9)

[1]	Kolsky H. An investigation of the mechanical properties of materials at very high rates of loading[J]. Proc Phys Soc B, 1949, 62(11): 676-700. doi: 10.1088/0370-1301/62/11/302
[2]	刘剑飞, 王正道, 胡时胜.低阻抗多孔介质材料的SHPB实验技术[J].实验力学, 1998, 13(2): 218-223. Liu J F, Wang Z D, Hu S S. The SHPB experiment technology for low wave impedance porous materials[J]. Journal of Experimental Mechanics, 1998, 13(2): 218-223. (in Chinese)
[3]	Chen W, Lu F, Zhou B. A quartz-crystal-embedded split Hopkinson pressure bar for soft materials[J]. Exp Mech, 2000, 40(1): 1-6.
[4]	林玉亮, 卢芳云, 卢力.石英压电晶体在霍普金森压杆实验中的应用[J].高压物理学报, 2005, 19(4): 299-304. Lin Y L, Lu F Y, Lu L. The application of quartz transducer technique in SHPB[J]. Chinese Journal of High Pressure Physics, 2005, 19(4): 299-304. (in Chinese)
[5]	Griffiths L J, Martin D J. A study of the dynamic behaviour of a carbon-fibre composite using the split Hopkinson pressure bar[J]. J Phys D, 1974, 7(17): 2329-2344. doi: 10.1088/0022-3727/7/17/308
[6]	Ramesh K T, Narasimhan S. Finite deformations and the dynamic measurement of radial strains in compression Kolsky bar experiments[J]. Int J Solids Struct, 1996, 33(25): 3723-3738. doi: 10.1016/0020-7683(95)00206-5
[7]	唐志平, 胡时胜, 王礼立.动态力学量的光电测试法[J].实验力学, 1991, 6(4): 401-406. Tang Z P, Hu S S, Wang L L. Photoelectric method for measuring dynamic mechanical variables[J]. Journal of Experimental Mechanics, 1991, 6(4): 401-406. (in Chinese)
[8]	Li Y, Ramesh K T. An optical technique for measurement of material properties in the tension Kolsky bar[J]. Int J Impact Eng, 2007, 34(4): 784-798. doi: 10.1016/j.ijimpeng.2005.12.002
[9]	唐孝容, 谭多望, 汪斌, 等.激光干涉仪在微型爆炸容器研究中的应用[J].应用激光, 2008, 28(5): 383-386. Tang X R, Tan D W, Wang B, et al. Application of laser micro-displacement interferometer system in mini-chemical explosion investigation[J]. Applied Laser, 2008, 28(5): 383-386. (in Chinese)