Ignition mechanism and chemical reaction of the micro-damage polymer-bonded explosives under different inertial loading conditions

Guo, Fengwei; Xu, Wenzheng; Wei, Yamei; Tan, Xianpeng; Zheng, Xin; Wang, Junyi; Zhao, Leyang; Yang, Yulong

doi:10.1016/j.polymertesting.2024.108532

Polymer Testing

2024

DOI: 10.1016/j.polymertesting.2024.108532

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Ignition mechanism and chemical reaction of the micro-damage polymer-bonded explosives under different inertial loading conditions

Fengwei Guo,

Wenzheng Xu,

Yamei Wei

et al.

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2024

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Cited by 1 publication

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Research on the influence of loading rate on the dynamic initiation fracture toughness of composite modified double-base propellant

Zheng,

Wu,

Sun

et al. 2024

Preprint

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In the field of gun launched missile extended range rocket, the propellant grain in the rocket needs to withstand significant launch loads during their firing phase, and also bear the high pressure caused by ignition, and the impact of launch overloads and ignition shocks on the structural integrity of propellants becomes very important. So this work investigated the dynamic initiation fracture toughness of the composite modified double-base (CMDB) propellant by both experiments and numerical simulations. The dynamic mechanical properties test of the cracked straight through flatten Brazilian disc (CSTFBD) specimens were conducted using a modified split Hopkinson pressure bar. By comparing the results of quasi static and dynamic numerical simulations, it was found that dynamic fracture initiation toughness can be determined by time-to-fracture using the quasi-static theory. The numerical simulation results combined with the ZWT constitutive model agree well with the experimental results. During the measurement of the mechanical response, the fracture surfaces of the dynamic test specimens were observed by electron microscopy scanning. Then the evolution of the microstructure synchronously was obtained. The scanning electron microscope result revealed that fracture modes and breakage of the ammonium perchlorate (AP) particles in the surface layer played an important role in determining the failure mechanism. The result of experimental measurement showed the influence of loading rate on the dynamic fracture initiation toughness of CMDB propellant.

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Research on the influence of loading rate on the dynamic initiation fracture toughness of composite modified double-base propellant

Zheng,

Wu,

Sun

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

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Ignition mechanism and chemical reaction of the micro-damage polymer-bonded explosives under different inertial loading conditions

Cited by 1 publication

References 35 publications

Research on the influence of loading rate on the dynamic initiation fracture toughness of composite modified double-base propellant

Research on the influence of loading rate on the dynamic initiation fracture toughness of composite modified double-base propellant

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