Simulational experiment on compression and fracture of propellant charge based on the discrete element method

ZHANG Ruihua; RUI Xiaoting; ZHAO Hongli; WANG Qionglin; JIN Jianwei

doi:10.11883/bzycj-2020-0157

Volume 41 Issue 6

Jun. 2021

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ZHANG Ruihua, RUI Xiaoting, ZHAO Hongli, WANG Qionglin, JIN Jianwei. Simulational experiment on compression and fracture of propellant charge based on the discrete element method[J]. Explosion And Shock Waves, 2021, 41(6): 062301. doi: 10.11883/bzycj-2020-0157

Citation:

ZHANG Ruihua, RUI Xiaoting, ZHAO Hongli, WANG Qionglin, JIN Jianwei. Simulational experiment on compression and fracture of propellant charge based on the discrete element method[J]. Explosion And Shock Waves, 2021, 41(6): 062301. doi: 10.11883/bzycj-2020-0157

Citation:

ZHANG Ruihua, RUI Xiaoting, ZHAO Hongli, WANG Qionglin, JIN Jianwei. Simulational experiment on compression and fracture of propellant charge based on the discrete element method[J]. Explosion And Shock Waves, 2021, 41(6): 062301. doi: 10.11883/bzycj-2020-0157

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Simulational experiment on compression and fracture of propellant charge based on the discrete element method

doi: 10.11883/bzycj-2020-0157

1.
Xi’an Modern Chemistry Research Institute, Xi’an 710065, Shaanxi, China
2.
Institute of Launch Dynamics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

Received Date: 2020-05-21
Rev Recd Date: 2020-09-16

Available Online: 2021-04-14

Publish Date: 2021-06-05

Abstract

Abstract

In order to reveal the mechanisms of gun breech-blow phenomenon caused by the fracture of propellant charge, it is urgent to carry out the simulation research on the compression and fracture of propellant charge under the corresponding charge structure. Through the analysis of the mechanical environment in the gun bore and the fracture progress of propellant charge, the discrete element method was employed to simulate the compression and fracture of propellant charge. The lace 19-hole propellant for the large caliber artillery was taken as the research object, a simulation system of compression and fracture of propellant charge was constructed using the EDEM software. And the Hertz-Mindlin contact model parameters were determined by using the drop hammer impact test of the single propellant at low temperature (–40 ℃). Then the compression andfracture simulation of the propellant charge was verified through the dynamic compression and fracture test of the propellant charge at low temperature (–40 ℃). Under the same impact load, the fracture of propellant charges and the compression stress-time curves of propellant charge were achieved by test and simulation, respectively. Using the obtained fracture propellant charge, the closed bomb simulation and test were carried out respectively. Among them, a combustion function based on the discrete element method was used to represent the gas generation law of the simulation fracture propellant charge. Finally, the initial dynamic vivacity ratio of the fracture propellant charge was processed according to the pressure-time curve. The researchresults show that the time histories of compression stress of propellant charge, the closed bomb pressure-time curves, and the initial dynamic vivacity ratios obtained by simulation and test are in good agreement with each other, indicating the designed simulation system is effective and reasonable. The research method has great engineering application value, which lays a foundation for the study of the impact fracture process of high-energy propellant charge and the launch safety of propellant charge.
- propellant charge,
- discrete element method,
- compression stress,
- launch safety,
- experiment verification

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References(13)

References

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