| 钢中绝热剪切带的动态损伤演化 |
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| 引用本文： | 刘新芹,王富耻,王琳,路永胜. 钢中绝热剪切带的动态损伤演化[J]. 兵器材料科学与工程, 2004, 27(3): 17-21 |
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| 作者姓名： | 刘新芹 王富耻 王琳 路永胜 |
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| 作者单位： | 北京理工大学,北京,100081;北京理工大学,北京,100081;北京理工大学,北京,100081;北京理工大学,北京,100081 |
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| 摘 要： | 采用大能量高速材料试验机冲击帽形试样的实验方法,研究了高速冲击条件下钢中绝热剪切带的损伤演化机制。试验结果表明,绝热剪切带的形成并不意味着剪切断裂的发生和宏观裂纹的形成。导致剪切带损伤的微观方式主要包括:基体接触区界面上的微裂纹、带内平直微裂纹、剪切带内与带成一定角度的微裂纹和孔洞。在这些微损伤方式的形核、长大过程中,绝热剪切带逐步损伤,宏观裂纹逐步形成。
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| 关 键 词： | 绝热剪切带 空洞 裂纹 损伤 |
| 文章编号： | 1004-244X(2004)03-0017-05 |
| 修稿时间： | 2003-10-20 |
Dynamic damage progress of adiabatic shear band of steel |
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| LIU Xin - qin,WANG Fu - chi,WANG Lin,LU Yong - sheng Beijing Institute of Technology,Beijing ,China. Dynamic damage progress of adiabatic shear band of steel[J]. Ordnance Material Science and Engineering, 2004, 27(3): 17-21 |
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| Authors: | LIU Xin - qin WANG Fu - chi WANG Lin LU Yong - sheng Beijing Institute of Technology Beijing China |
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| Affiliation: | LIU Xin - qin,WANG Fu - chi,WANG Lin,LU Yong - sheng Beijing Institute of Technology,Beijing 10081,China |
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| Abstract: | Hat - shaped samples of steels are impacted by a large - energy and high - speed punch in order to study themicro - damage mechanisms of the adiabatic shear band of steels under high - rate impact. The results show that the initiationof a adiabatic shear band does not mean the happening of a shear fracture, and the appearance of a macro - crack. The waysof micro - damage include angled micro - cracks with the bands, micro - cracks in the interfaces between the bands and thematrix, micro - cracks in the middle of the bands, and voids. During the initiation and growth of the micro - damages, adia-batic shear bands are destroyed and a fracture occurs. |
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| Keywords: | adiabatic shear band void crack damage |
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