岳中文;杨仁树;杨立云;张耀辉;韩朋飞;
YUE Zhong-wen1,YANG Ren-shu1,2,YANG Li-yun1,ZHANG Yao-hui1,HAN Peng-fei1(1.School of Mechanics & Civil Engineering,China University of Mining & Technology,Beijing 100083,China;2.State Key Laboratory for GeoMechanics and Deep Underground Engineering,China University of Mining and Technology,Beijing 100083,China)

• 1:中国矿业大学(北京)力学与建筑工程学院
• 2:深部岩土力学与地下工程国家重点实验室(中国矿业大学)

摘要(Abstract)：

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,裂纹扩展加速度最大值为9.47Mm/s2,切口端部动态应力强度因子KdⅠ最大值为0.6MN/m3/2。
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.

关键词(KeyWords)： 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
Explosion stress wave;Edge sharp V-notch;Dynamic caustics;Crack growth;Dynamic stress intensity factor

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑计划(2008BAB33B04-3);; 中央高校基本科研业务费资助

作者(Authors): 岳中文;杨仁树;杨立云;张耀辉;韩朋飞;
YUE Zhong-wen1,YANG Ren-shu1,2,YANG Li-yun1,ZHANG Yao-hui1,HAN Peng-fei1(1.School of Mechanics & Civil Engineering,China University of Mining & Technology,Beijing 100083,China;2.State Key Laboratory for GeoMechanics and Deep Underground Engineering,China University of Mining and Technology,Beijing 100083,China)

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