Compressive mechanical properties and constitutive relations of PBX-1

SUN Wenxu; LUO Zhiheng; TANG Mingfeng; LI Ming; LIU Tong; ZHANG Dingguo

doi:10.11883/bzycj-2018-0398

Volume 39 Issue 7

Jul. 2019

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SUN Wenxu, LUO Zhiheng, TANG Mingfeng, LI Ming, LIU Tong, ZHANG Dingguo. Compressive mechanical properties and constitutive relations of PBX-1[J]. Explosion And Shock Waves, 2019, 39(7): 072301. doi: 10.11883/bzycj-2018-0398

Citation:

SUN Wenxu, LUO Zhiheng, TANG Mingfeng, LI Ming, LIU Tong, ZHANG Dingguo. Compressive mechanical properties and constitutive relations of PBX-1[J]. Explosion And Shock Waves, 2019, 39(7): 072301. doi: 10.11883/bzycj-2018-0398

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Compressive mechanical properties and constitutive relations of PBX-1

doi: 10.11883/bzycj-2018-0398

SUN Wenxu^{1, 2, 3
,},
LUO Zhiheng^{2, 3},
TANG Mingfeng²,
LI Ming²,
LIU Tong^{3, 4
,
,},
ZHANG Dingguo¹

1.
School of Sciences, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China
3.
Graduate School of China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
4.
Chengdu Science Development Center of China Academy of Engineering Physics, Chengdu 610200, Sichuan, China

Received Date: 2018-10-17
Rev Recd Date: 2018-12-03
Publish Date: 2019-07-01

Abstract

Abstract

The mechanical behavior of PBX has an important impact on its safety. In order to study the mechanical properties of PBX-1, the quasi-static mechanical experiments and SHPB (split-Hopkinson pressure bar) experiments were conducted. The results showed that the crack direction was the direction of maximum shear stress, which was about 45° to the loading direction in the quasi static compression tests. In the SHPB tests, the dynamic yield strength, dynamic compression strength and failure strain of PBX-1 explosive were continuously improved with the improvement of strain rate in the range of 100−1 500 s⁻¹.The dynamic yield strength gradually increased from the static 2.77 MPa to 16.1 MPa. The compression strength increased from 7.46 MPa to 16.1 MPa, and the failure strain increased from 6.23% to 26.4%. At the same time, based on the Z-W-T model, a dynamic viscoelastic constitutive model with damage was established. It has a high accuracy in the range of 330−1 500 s⁻¹ strain rate, and could be used to describe the dynamic mechanical behavior of PBX-1 before failure.
- PBX-1 explosive,
- dynamic behavior,
- damage,
- Z-W-T constitutive model

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References(13)

References

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