| 基于Griffith强度理论的空腔膨胀模型与应用研究 |
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| 引用本文： | 黄民荣,顾晓辉,高永宏. 基于Griffith强度理论的空腔膨胀模型与应用研究[J]. 力学与实践, 2009, 31(5): 30-34. DOI: 10.6052/1000-0879-2008-351 |
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| 作者姓名： | 黄民荣 顾晓辉 高永宏 |
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| 作者单位： | 南京理工大学机械工程学院南京理工大学机械工程学院 |
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| 摘 要： | 根据混凝土材料受高速冲击时产生大量碎裂的特点，假设其粉碎(塑性)区介质服从Griffith强度理论，发展了弹丸深侵彻混凝土靶的动态空腔膨胀模型，建立了弹丸深侵彻理论计算公式. 对比表明：基于Griffith强度理论的球形动态空腔膨胀模型的计算结果与实验数据吻合较好.
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| 关 键 词： | 侵彻 动态空腔膨胀理论 Griffith双轴屈服准则 混凝土 |
| 收稿时间： | 2008-07-11 |
| 修稿时间： | 2009-03-23 |
CAVITY EXPANSION MODEL BASED ON THE GRIFFITH STRENGTH THEORY AND ITS APPLICATION |
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| HUANG Minrong , GU Xiaohui , GAO Yonghong. CAVITY EXPANSION MODEL BASED ON THE GRIFFITH STRENGTH THEORY AND ITS APPLICATION[J]. Mechanics and Engineering, 2009, 31(5): 30-34. DOI: 10.6052/1000-0879-2008-351 |
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| Authors: | HUANG Minrong GU Xiaohui GAO Yonghong |
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| Abstract: | A theoretical analysis is carried out for concrete targetssubjected to impact of projectiles. According to the vastcomminution feature of concrete materials subjected toprojectiles high-velocity impact, the materials in the comminuted or plasticregion are assumed to obey the Griffith strength theory. A dynamiccavity expansion model is built for projectiles deeply penetrating into concretetargets. An analytical calculation formula is obtained.Predictions are in good agreement with test data. |
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| Keywords: | penetration dynamic cavity expansion theory the Griffith’s biaxial-stress criterion concrete |
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