Rheological properties of Composition B in slow cook-off process

ZHOU Jie; ZHI Xiaoqi; WANG Shuai; HAO Chunjie

doi:10.11883/bzycj-2019-0321

Volume 40 Issue 5

May 2020

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ZHOU Jie, ZHI Xiaoqi, WANG Shuai, HAO Chunjie. Rheological properties of Composition B in slow cook-off process[J]. Explosion And Shock Waves, 2020, 40(5): 052301. doi: 10.11883/bzycj-2019-0321

Citation:

ZHOU Jie, ZHI Xiaoqi, WANG Shuai, HAO Chunjie. Rheological properties of Composition B in slow cook-off process[J]. Explosion And Shock Waves, 2020, 40(5): 052301. doi: 10.11883/bzycj-2019-0321

ZHOU Jie, ZHI Xiaoqi, WANG Shuai, HAO Chunjie. Rheological properties of Composition B in slow cook-off process[J]. Explosion And Shock Waves, 2020, 40(5): 052301. doi: 10.11883/bzycj-2019-0321

Citation:

ZHOU Jie, ZHI Xiaoqi, WANG Shuai, HAO Chunjie. Rheological properties of Composition B in slow cook-off process[J]. Explosion And Shock Waves, 2020, 40(5): 052301. doi: 10.11883/bzycj-2019-0321

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Rheological properties of Composition B in slow cook-off process

doi: 10.11883/bzycj-2019-0321

1.
School of Electromechanic Engineering, North University of China, Taiyuan 030051, Shanxi, China
2.
Jinxi Industrial Group Co. Ltd., Taiyuan 030051, Shanxi, China

Received Date: 2019-08-22
Rev Recd Date: 2019-10-10
Publish Date: 2020-05-01

Abstract

Abstract

In order to investigate the changes of the internal physical fields of melt-castable explosives in cook-off, Composition B was chosen as the object. A complete viscosity model of Composition B based on the Bingham flow model was first established, and then applied in the numerical simulations of slow cook-off. In this way, the temperature curves of three inner measuring pointsthat located in the upper, middle and lower respectively were obtained and further testified with cook-off experimental measurements. Moreover, the variation of the inner temperature field in the whole process was observed as well. The results showed that when the heating rate was 1 ℃/min, the viscosity flow of Composition B appeared soon after the phase change, and the inner temperature field changed with that. The self-heating and ignition occurred in the upside area of the shell. But when the heating rate was 0.055 ℃/min, the inner temperature field was still like a solid phase after the phase change was completely done for a long time, and the viscosity flow appeared after the self-heating started, the inner temperature field gradually began to change like a liquid phase just at that time. The ignition area was in the upside of the shell too, but the self-heating area was in the middle of the shell. The contradictory points of view in previous studies can be preliminarily explained by this model.
- slow cook-off test,
- melt-castable explosives,
- viscosity,
- Bingham fluid,
- responses

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References(18)

References

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