Molecular Dynamics Simulation of Mechanical Properties of Polymer Bonded Explosive under Tension Loading

GAO Feiyan; LIU Rui; CHEN Pengwan; LONG Yao; CHEN Jun

doi:10.11858/gywlxb.20220521

Volume 36 Issue 4

Jul 2022

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Chinese Journal of High Pressure Physics > 2022 > 36(4): 044201.

GAO Feiyan, LIU Rui, CHEN Pengwan, LONG Yao, CHEN Jun. Molecular Dynamics Simulation of Mechanical Properties of Polymer Bonded Explosive under Tension Loading[J]. Chinese Journal of High Pressure Physics, 2022, 36(4): 044201. doi: 10.11858/gywlxb.20220521

Citation:

GAO Feiyan, LIU Rui, CHEN Pengwan, LONG Yao, CHEN Jun. Molecular Dynamics Simulation of Mechanical Properties of Polymer Bonded Explosive under Tension Loading[J]. Chinese Journal of High Pressure Physics, 2022, 36(4): 044201. doi: 10.11858/gywlxb.20220521

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Molecular Dynamics Simulation of Mechanical Properties of Polymer Bonded Explosive under Tension Loading

doi: 10.11858/gywlxb.20220521

GAO Feiyan^1
,,
LIU Rui¹,
CHEN Pengwan^{1,*
,
,},
LONG Yao²,
CHEN Jun^{2, 3,*
,
,}

1.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
2.
Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
3.
Center for Applied Physics and Technology, Peking University, Beijing 100871, China

Received Date: 25 Feb 2022
Rev Recd Date: 01 Apr 2022

Available Online: 26 May 2022

Issue Publish Date: 28 Jul 2022

Abstract

Abstract

In this paper, molecular dynamics method is used to study the strain rate dependence of HMX-based polymer bonded explosive (PBX) interface under dynamic tension loading. Our results show that the tension strength and elastic modulus of PBX increase with the increasing of strain rate. The fracture of HMX-F2311 is dependent on the strain rate: the initial strain mainly appears on the binder F2311, a main crack perpendicular to the loading direction is formed at low strain rate, while the failure path distributes on the whole model under high strain rate; the fracture of PBX is due to the debonding of binder. With the increasing of strain rate, the potential energy of HMX-F2311 increases rapidly, and the van der Waals force interaction plays a crucial role in the evolution of potential energy under high strain rate. The simulation reveals the effect of strain rate on the interface microstructure, mechanical behavior and fracture mechanism of the HMX-F2311, providing opinions for the design, preparation and safety of PBX.
- polymer bonded explosive,
- uniaxial tension,
- mechanical property,
- fracture mechanism,
- molecular dynamics

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References(25)

References

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Molecular Dynamics Simulation of Mechanical Properties of Polymer Bonded Explosive under Tension Loading

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