Prediction Model of Mechanics Response of Warhead Charge under One-dimensional Stress Dynamic Loading

doi:10.3969/j.issn.1000-1093.2019.04.011

Abstract

Abstract: The dynamic mechanical response characteristics of warhead charge (RDX-based polymer-bonded explosive (PBX)) at high strain rate are studied to obtain the dynamic behavior of warhead charge during high overload penetration. The dynamic mechanical properties of RDX-based PBX explosive are studied by improved SHPB experimental technology. The stress states at both ends of a specimen are monitored using the piezoelectric sensors. The deformation process of the specimen in the experiment is photographed using a high-speed camera. It is ensured that the experimental specimen is deformed under the conditions of dynamic stress balance and constant strain rate loading, and the experimental data are effective. The results show that the RDX-based PBX explosive has obvious density effect and strain rate effect. As the strain exceeds 0.075, the strain rate effect increases significantly. Based on the strain energy function, a modified Rivilin constitutive model of RDX-based PBX explosive under one-dimensional stress state is established. The fitting results of the model are basically in agreement with the experimental results. The strain time signals and the deformation modes of the specimen obtained from the simulation results are basically in agreement with the experimental results. Key

Key words: warheadcharge, mechanicsresponse, strainrateeffect, one-dimensionalstress, dynamicloading, numericalsimulation

CLC Number:

TJ410.3⁺41

CAI Xuanming， ZHANG Wei， XU Peng， GAO Yubo， FAN Zhiqiang. Prediction Model of Mechanics Response of Warhead Charge under One-dimensional Stress Dynamic Loading[J]. Acta Armamentarii, 2019, 40(4): 762-768.

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第40卷
第4期2019 年4月兵工学报ACTA
ARMAMENTARIIVol.40No.4Apr.2019

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