| 爆炸载荷下边界锐V型切口尖端裂纹扩展行为 |
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| 引用本文： | 岳中文,杨仁树,杨立云,张耀辉,韩朋飞.爆炸载荷下边界锐V型切口尖端裂纹扩展行为[J].工程爆破,2011,17(1):8-11,38. |
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| 作者姓名： | 岳中文 杨仁树 杨立云 张耀辉 韩朋飞 |
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| 作者单位： | 岳中文,杨立云,张耀辉,韩朋飞,YUE Zhong-wen,YANG Li-yun,ZHANG Yao-hui,HAN Peng-fei(中国矿业大学(北京)力学与建筑工程学院,北京,100083);杨仁树,YANG Ren-shu(中国矿业大学(北京)力学与建筑工程学院,北京100083;深部岩土力学与地下工程国家重点实验室(中国矿业大学),北京100083) |
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| 基金项目： | 国家科技支撑计划，中央高校基本科研业务费资助项目 |
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| 摘 要： | 为了研究爆炸应力波作用下板条边界锐V型切口端部的动态扩展行为,采用动态焦散线实验方法,进行了爆炸载荷下板条边界锐V型切口端部裂纹扩展规律的实验研究.研究结果表明,爆炸应力波作用下,板条试件边界锐V型切口端部的扩展过程中,裂纹扩展速度、加速度和切口端部动态应力强度因子随时间是波动变化的.扩展速度最大值达到210m/s,裂...
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| 关 键 词： | 爆炸应力波 边界锐V型切口 动态焦散线 裂纹扩展 动态应力强度因子 |
CRACK GROWTH BEHAVIOR OF AN EDGE SHARP V-NOTCH TIP UNDER BLASTING LOAD |
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| YUE Zhong-wen,YANG Ren-shu,YANG Li-yun,ZHANG Yao-hui,HAN Peng-fei.CRACK GROWTH BEHAVIOR OF AN EDGE SHARP V-NOTCH TIP UNDER BLASTING LOAD[J].Engineering Blasting,2011,17(1):8-11,38. |
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| Authors: | YUE Zhong-wen YANG Ren-shu YANG Li-yun ZHANG Yao-hui HAN Peng-fei |
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| Abstract: | In order to study on dynamic development behavior of an edge sharp V-notch in strips subjected to explosion stress waves,the law of crack growth of the edge sharp V-notch under blasting load was studied in the lab by dynamic caustics method.The studied results show that the crack growth velocity,acceleration and dynamic stress intensity factor at the edge sharp V-notch tip with time fluctuate in the whole development process of the edge sharp V-notch under explosion stress waves.The maximum value of crack growth velocity is 210m/s and that of crack growth acceleration is 9.47Mm/s2,while the maximum dynamic stress intensity factor KdⅠ at the edge sharp V-notch tip is 0.6MN/m3/2. |
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| Keywords: | Explosion stress wave Edge sharp V-notch Dynamic caustics Crack growth Dynamic stress intensity factor |
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