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爆炸载荷下板条边界斜裂纹的动态扩展行为
引用本文:岳中文,杨仁树,董聚才,韩朋飞.爆炸载荷下板条边界斜裂纹的动态扩展行为[J].爆炸与冲击,2011,31(1):75-80.
作者姓名:岳中文  杨仁树  董聚才  韩朋飞
作者单位:中国矿业大学(北京)力学与建筑工程学院,北京,100083;中国矿业大学(北京)力学与建筑工程学院,北京,100083;中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室,北京,100083
摘    要:为了研究爆炸应力波作用下板条边界斜裂纹的动态扩展行为,首先分析了爆炸应力波在含边界斜裂纹板条中的传播,其次采用动态焦散线实验方法,进行了爆炸载荷下板条边界斜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,板条试件边界斜裂纹的扩展过程中,裂纹扩展速度、扩展加速度和裂尖动态应力强度因子随时间波动变化,扩展速度最大值...

关 键 词:固体力学  裂纹扩展  动态焦散线  边界斜裂纹  爆炸应力波

Dynamic propagation behaviors of an oblique edge crack in material under blast loading
YUE Zhong-wen,YANG Ren-shu,DONG Ju-cai,HAN Peng-fei.Dynamic propagation behaviors of an oblique edge crack in material under blast loading[J].Explosion and Shock Waves,2011,31(1):75-80.
Authors:YUE Zhong-wen  YANG Ren-shu  DONG Ju-cai  HAN Peng-fei
Institution:1.Schoolof Mechanics& CivilEngineering,ChinaUniversityof MiningandTechnology,2.Beijing100083,China
Abstract:The propagation of explosion stress waves in strips containing an oblique edge crack was analyzed.And a series of caustic experiments were conducted to explore the crack extension under blast loading.Investigated results show that the crack growth velocity,acceleration and dynamic stress intensity factors fluctuate during the propagation of the oblique edge crack under explosion stress waves.The maximum values of the crack growth velocity,acceleration and dynamic stress intensity factor KdⅠ at the crack tip are 222 m/s,11.01 MN/s2 and 0.735 MN/m3/2,respectively.The tensile field at the tip of the oblique edge crack is a main factor to induce crack initiation and propagation.
Keywords:solid mechanics  crack propagation  dynamic caustics  oblique edge crack  explosion stress wave  
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