Dimensional effects of hat-shaped specimen in Hopkinson bar test

Xiao Dawu; Ma Ce; He Lifeng

doi:10.11883/1001-1455(2016)01-0064-05

Volume 36 Issue 1

Oct. 2018

Turn off MathJax

Article Contents

Article Navigation > Explosion And Shock Waves > 2016 > 36(1): 64-68

Xiao Dawu, Ma Ce, He Lifeng. Dimensional effects of hat-shaped specimen in Hopkinson bar test[J]. Explosion And Shock Waves, 2016, 36(1): 64-68. doi: 10.11883/1001-1455(2016)01-0064-05

Citation:

Xiao Dawu, Ma Ce, He Lifeng. Dimensional effects of hat-shaped specimen in Hopkinson bar test[J]. Explosion And Shock Waves, 2016, 36(1): 64-68. doi: 10.11883/1001-1455(2016)01-0064-05

Xiao Dawu, Ma Ce, He Lifeng. Dimensional effects of hat-shaped specimen in Hopkinson bar test[J]. Explosion And Shock Waves, 2016, 36(1): 64-68. doi: 10.11883/1001-1455(2016)01-0064-05

Citation:

Xiao Dawu, Ma Ce, He Lifeng. Dimensional effects of hat-shaped specimen in Hopkinson bar test[J]. Explosion And Shock Waves, 2016, 36(1): 64-68. doi: 10.11883/1001-1455(2016)01-0064-05

PDF( 1225 KB)

Dimensional effects of hat-shaped specimen in Hopkinson bar test

doi: 10.11883/1001-1455(2016)01-0064-05

Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, Sichuan, China

Received Date: 2013-11-11
Rev Recd Date: 2014-01-25
Publish Date: 2016-01-25

Abstract

Abstract

Numerical Hopkinson bar experiments of hat-shaped specimens with different geometries were carried out using ANSYS/LS-DYNA to investigate the effects resulting from varying the geometrical dimensions of specimens. Results show that the stress value calculated by the classic formula deviated drastically from the theoretical value, when the width t the of shear zone was larger than 0.2 mm. When the width t was 1.0 mm, the calculated stress value would even rise up to twice as much as close to the theoretical value. Further research with the split model revealed that the deviation of the stress mainly occurred as a result from the expansion deformation of the brim portion of the hat-shaped specimen. An improved method of data processing for the hat-shaped specimen was also presented based on the numerical simulation results. Finally, the method was also validated by SHPB experiments with cylinder specimens and hat-shaped specimens with different dimensions.
- solid mechanics,
- geometry effect,
- ANSYS/LS-DYNA,
- hat-shaped specimen,
- SHPB

FullText(HTML)

References(7)

References

[1]	Zukas J A, Nicholas T, Swift H F, et al. Impact dynamics[M]. Malabar, Florida: Krieger Publishing Company, 1992.
[2]	肖大武, 李英雷, 蔡灵仓.绝热剪切研究进展[J].实验力学, 2010, 25(4):463-475. http://d.old.wanfangdata.com.cn/Periodical/sylx201004015 Xiao Dawu, Li Yinglei, Cai Lingcang. Progress in research on adiabatic shearing[J]. Journal of Experimental Mechanics, 2010, 25(4):463-475. http://d.old.wanfangdata.com.cn/Periodical/sylx201004015
[3]	Andrade U, Meyers M A, Vecchio K S, et al. Dynamic recrystallization in high-strain, high-strain-rate plastic deformation of copper[J]. Acta Metallurgica et Materialia, 1994, 42(9):3183-3195. doi: 10.1016/0956-7151(94)90417-0
[4]	Rittel D, Dorogoy A. Numerical validation of the shear compression specimen. Part I: Quasi-static large strain testing[J]. Experimental Mechanics, 2005, 45(2):167-177. http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.612.7957
[5]	刘新芹, 谭成文, 张静, 等.应力状态对Ti-6Al-4V绝热剪切敏感性的影响[J].稀有金属材料与工程, 2008, 37(9):1522-1525. doi: 10.3321/j.issn:1002-185X.2008.09.004 Liu Xinqin, Tan Chengwen, Zhang Jing, et al. Influence of stress-state on adiabatic shear sensitivity of Ti-6Al-4V[J]. Rare Metal Materials and Engineering, 2008, 37(9):1522-1525. doi: 10.3321/j.issn:1002-185X.2008.09.004
[6]	陈思颖, 黄晨光, 孔卫国, 等.结构钢中绝热剪切带形成与扩展的光学观测与数值模拟响[J].高压物理学报, 2010, 24(1):31-36. doi: 10.3969/j.issn.1000-5773.2010.01.006 Chen Siying, Huang Chenguang, Kong Weiguo, et al. Optical observation and numerical simulation on the evolution of adiabatic shear band in structural steel[J]. Chinese Journal of High Pressure Physics, 2010, 24(1):31-36. doi: 10.3969/j.issn.1000-5773.2010.01.006
[7]	Wang B F, Yang Y. Microstructure evolution in adiabatic shear band in fine-grain-sized Ti-3Al-5Mo-4.5V alloy[J]. Materials Science and Engineering: A, 2008, 473(1/2):306-311. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=8c0d94d452ec6180419dec4a572a15e1