Computational design for complex loading on grade density impactor with strain rates of 105~106 s-1

Bai Jing-song; Li Lei; Yu Yu-ying; Wang Yu; Zhang Hong-ping; Luo Guo-qiang; Shen Qiang; Dai Cheng-da; Tan Hua; Wu Qiang; Zhang Lian-meng

doi:10.11883/1001-1455(2015)06-0792-07

Volume 35 Issue 6

Nov. 2015

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Bai Jing-song, Li Lei, Yu Yu-ying, Wang Yu, Zhang Hong-ping, Luo Guo-qiang, Shen Qiang, Dai Cheng-da, Tan Hua, Wu Qiang, Zhang Lian-meng. Computational design for complex loading on grade density impactor with strain rates of 105~106 s-1[J]. Explosion And Shock Waves, 2015, 35(6): 792-798. doi: 10.11883/1001-1455(2015)06-0792-07

Citation:

Bai Jing-song, Li Lei, Yu Yu-ying, Wang Yu, Zhang Hong-ping, Luo Guo-qiang, Shen Qiang, Dai Cheng-da, Tan Hua, Wu Qiang, Zhang Lian-meng. Computational design for complex loading on grade density impactor with strain rates of 10⁵~10⁶ s^-1[J]. Explosion And Shock Waves, 2015, 35(6): 792-798. doi: 10.11883/1001-1455(2015)06-0792-07

Citation:

Bai Jing-song, Li Lei, Yu Yu-ying, Wang Yu, Zhang Hong-ping, Luo Guo-qiang, Shen Qiang, Dai Cheng-da, Tan Hua, Wu Qiang, Zhang Lian-meng. Computational design for complex loading on grade density impactor with strain rates of 10⁵~10⁶ s^-1[J]. Explosion And Shock Waves, 2015, 35(6): 792-798. doi: 10.11883/1001-1455(2015)06-0792-07

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Computational design for complex loading on grade density impactor with strain rates of 10⁵~10⁶ s^-1

doi: 10.11883/1001-1455(2015)06-0792-07

Bai Jing-song^{1, 2
,},
Li Lei¹,
Yu Yu-ying^{1, 2},
Wang Yu¹,
Zhang Hong-ping¹,
Luo Guo-qiang³,
Shen Qiang³,
Dai Cheng-da^{1, 2},
Tan Hua^{1, 2},
Wu Qiang^{1, 2},
Zhang Lian-meng³

1.
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
3.
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei, China

Received Date: 2014-05-21
Rev Recd Date: 2014-10-22
Publish Date: 2015-12-10

Abstract

Abstract

In order to carry out the complex loading research with the strain rates varying from 10⁵ s^-1 to 10⁶ s^-1 on the light gas gun, we numerically simulated the complex loading on the steel target by the graded ensity impactor (GDI) of Al-Cu-W system using our own developed Lagrangian code MLEP (multi-material Lagrangian elastic-plastic). In our simulation, the effects of the thickness of the GDI and the power exponent of denstiy distribution on the pressure, velocity, and peak strain rate of the target were investigated. The results indicate that the loading time decreases as the power exponent of density distribution increases, and the profiles of pressure, velocity and peak strain rate at the later stage of the loading are steeper than those with smaller power exponents. Moreover, the effect of the thickness of the GDI is considered in our computational design to prevent the confluence of the rarefaction waves emanating from the back of the GDI and the interface between the target and LiF window on the impact interface. Finally, a dynamic test was conducted for the GDI based on the design, and the results show the good agreement between the design and the experiment, which paves the way for the strength measurement of materials in the future.
- solid mechanics,
- complex loading,
- computational design,
- grade density impactor,
- Al-Cu-W system

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References(11)

References

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