| 动焦散线在爆炸裂纹扩展试验研究中的应用 |
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| 引用本文： | 李清,赵艳苹,马英丽,王东晓,杨仁树.动焦散线在爆炸裂纹扩展试验研究中的应用[J].工程爆破,2005,11(3):5-8. |
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| 作者姓名： | 李清 赵艳苹 马英丽 王东晓 杨仁树 |
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| 作者单位： | 中国矿业大学北京校区力学与建筑工程学院,北京,100083;中国矿业大学北京校区力学与建筑工程学院,北京,100083;中国矿业大学北京校区力学与建筑工程学院,北京,100083;中国矿业大学北京校区力学与建筑工程学院,北京,100083;中国矿业大学北京校区力学与建筑工程学院,北京,100083 |
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| 基金项目： | 高等学校博士学科点专项科研项目 |
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| 摘 要： | 爆炸裂纹的动态扩展问题是爆炸力学研究的热点。本文建立了爆炸加载的动焦散线测试系统,解决了试验中的有效光学图片获取、精确同步控制等问题,为进一步定量分析爆炸裂纹扩展规律提供了一种新的有效实验方法。采用爆炸加载的透射式动焦散实验系统,初步研究了爆炸载荷下的裂纹起裂、发展和止裂的动态扩展行为,分析其破坏模式和动态应力强度因子、裂纹扩展速度的变化,并研究了爆炸裂纹穿过有机玻璃板的人工层理的规律。
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| 关 键 词： | 爆炸荷载 裂纹扩展 动焦散线 |
| 文章编号： | 1006-7051（2005）03-0005-04 |
| 收稿时间： | 2005-02-23 |
| 修稿时间： | 2005年2月23日 |
APPLICATION OF DYNAMIC CAUSTICS FOR CRACKS PROPAGATION UNDER BLASTING LOAD |
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| LI Qing,ZHAO Yan-ping,MA Ying-li,WANG Dong-xiao,YANG Ren-shu.APPLICATION OF DYNAMIC CAUSTICS FOR CRACKS PROPAGATION UNDER BLASTING LOAD[J].Engineering Blasting,2005,11(3):5-8. |
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| Authors: | LI Qing ZHAO Yan-ping MA Ying-li WANG Dong-xiao YANG Ren-shu |
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| Affiliation: | School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China |
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| Abstract: | The research of dynamic propagation of crack is prevalent in explosion mechanics. A dynamic caustics measuring system has been established with a stable function subject to blasting load, making accurate synchronized control of blasting load and caustic graphic recording possible in test, and offering a new effective method for conducting a further quantitative analysis of the law of crack propagation of blasting fracture. The preliminary application of dynamic caustic to the tests of the mechanism on which the blasting fracture originates and propagates was described in the present paper,and furthermore,the normal law and mode of crack propagation, the stress intensity factor as well as the change in velocity of crack propagation, were analyzed. Besides,the paper also researched the crack propagation in man-made jointed materials and their influence on the joints by stress wave. |
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| Keywords: | Blasting load Crack propagation Dynamic caustics |
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