缺陷对圆管膨胀断裂影响的实验研究

金山; 张世文; 龙建华

doi:10.11858/gywlxb.2011.02.017

缺陷对圆管膨胀断裂影响的实验研究

doi: 10.11858/gywlxb.2011.02.017

中国工程物理研究院流体物理研究所，冲击波物理与爆轰物理国防科技重点实验室，四川绵阳 621900

详细信息

通讯作者:
张世文

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出版历程
- 收稿日期: 2009-12-08
- 修回日期: 2010-05-06
- 刊出日期: 2011-04-15

Experimental Study on the Influences of Defects on Expanding Fracture of a Metal Cylinder

National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, China

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Corresponding author: ZHANG Shi-Wen

摘要

摘要: 采用高速分幅摄影技术，通过对比实验，获得了清晰的无缺陷和预制缺陷金属圆管膨胀断裂的演化图像。实验结果表明，缺陷大大加速了圆管的断裂过程；有缺陷圆管的产物开始泄漏的时间比无缺陷圆管提前5.5 s，采用应力/应变集中法很好地解释了这种现象。另外，针对预制缺陷圆管膨胀断裂时出现的裂块较小而数量较多、无缺陷圆管膨胀断裂时裂块相对较大而数量较少的现象，采用Mott波理论进行了合理的解释。
- 爆炸力学 /
- 圆管 /
- 缺陷 /
- 膨胀断裂 /
- Mott波
Abstract: By means of high-speed frame photography, clear images of the expanding fracture of two metal cylinders with and without a notch were obtained. The experimental results showed that the notch defect would significantly accelerate the fracture process of the cylinder. For the metal cylinder containing a prefabricated notch, the leakage time of detonation products (5.5 s) is earlier than that without a notch, which can be satisfactorily explained by stress or strain concentration. Furthermore, using Mott wave theory, it is well explained that the fragments of the metal cylinder with a notch defect are smaller and more abundant than that without defect.
- mechanics of explosion /
- cylinder /
- defect /
- expanding fracture /
- Mott wave

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参考文献(14)

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