摘要
The safety assessment of PBX explosive is inseparable from the characterization of its mechanical response and damage. In order to accurately capture the mechanical behavior of PBX explosive, the numerical characterization method of PBX explosive mechanical behavior is studied based on Karagozian & Case (K&C) model framework. The damage evolution mode in the K&C model is modified, and the pressure-dependent characteristics of PBX explosive modulus and damage evolution mode are considered. Based on a series of published experimental data, the strain rate effect in the K&C model was corrected, the ratio of tension to compression meridian of PBX under different pressures was discussed, the deformation localization in the process of structural damage was dealt with, and the treatment of the tensile failure unit in the calculation was presented. The proposed model can be used to well depict the cratering morphology of explosive specimen in the Steven test, and successfully capture the tensile and shear failure images of explosive specimen.
投稿的翻译标题 | Numerical Characterization of Dynamic Damage of PBX Explosive |
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源语言 | 繁体中文 |
页(从-至) | 1381-1389 |
页数 | 9 |
期刊 | Binggong Xuebao/Acta Armamentarii |
卷 | 40 |
期 | 7 |
DOI | |
出版状态 | 已出版 - 1 7月 2019 |
关键词
- Polymer bonded explosive
- Ratio of tensile to compression meridian
- Strain localization
- Strain rate effect
- Tensile failure