| 考虑剪胀效应的混凝土动态柱形空腔膨胀理论 |
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| 引用本文： | 张欣欣,武海军,黄风雷.考虑剪胀效应的混凝土动态柱形空腔膨胀理论[J].北京理工大学学报,2016,36(10):1006-1010. |
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| 作者姓名： | 张欣欣 武海军 黄风雷 |
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| 作者单位： | 北京理工大学爆炸科学与技术国家重点实验室,北京,100081;北京理工大学爆炸科学与技术国家重点实验室,北京,100081;北京理工大学爆炸科学与技术国家重点实验室,北京,100081 |
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| 基金项目： | 国家自然科学基金资助项目（11390362，11572048）；国家部委基础科研项目（B1020132071） |
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| 摘 要： | 同时考虑混凝土的压缩和扩容特性，建立了动态柱形空腔膨胀理论，其中完整的靶体响应为密实区-扩容区-开裂区-弹性区，在扩容区采用扩容方程，使用该理论得到了空腔表面应力与膨胀速度的表达式，并使用该式计算得到弹体侵深和加速度.研究结果表明，运用该理论建立的刚性侵彻方程，其计算结果与实验结果具有良好的一致性，模型可以较好描述不同头部形状尖卵形弹体的侵彻能力以及加速度变化趋势.
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| 关 键 词： | 混凝土 动态柱形空腔膨胀理论 剪胀效应 侵彻 |
| 收稿时间： | 2015/6/15 0:00:00 |
Theory of Dynamic Cylindrical Cavity Expansion of Concrete with Shear-Dilatancy |
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| ZHANG Xin-xin,WU Hai-jun and HUANG Feng-lei.Theory of Dynamic Cylindrical Cavity Expansion of Concrete with Shear-Dilatancy[J].Journal of Beijing Institute of Technology(Natural Science Edition),2016,36(10):1006-1010. |
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| Authors: | ZHANG Xin-xin WU Hai-jun and HUANG Feng-lei |
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| Affiliation: | State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | Considering the compression as well as the dilatation of the concrete, a theory of dynamic cylindrical cavity expansion was proposed, where the complete response of target included densification region, dilatation region, crack region, elastic region, and the dilatant-kinematic relation was used in the dilatation region. A relation between the cavity stress and the expansion speed was got based on the theory, and according to the relation both the depth of penetration and the acceleration were calculated. The research indicates that the calculated results based on the theory fit well with the experiment data, and the model can predict the penetration ability and the acceleration of the projectile with CRH=6 well. |
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| Keywords: | concrete dynamic cylindrical cavity expansion shear-dilatancy penetration |
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