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动静组合应力作用下岩石裂纹扩展行为研究

发表时间:2011-08-15  浏览量:1451  下载量:625
全部作者: 师访,高峰
作者单位: 中国矿业大学力学与建筑工程学院;中国矿业大学深部岩土力学与地下工程国家重点实验室
摘 要: 研究较强应力波作用下节理裂隙的裂纹扩展规律,导出动静叠加载荷作用下裂纹的起裂角和裂纹扩展角公式,并发现明显不同于静载单独作用下的情况:动静组合加载时,裂纹扩展速度的瞬时变化将增加裂纹扩展方位的复杂性。用RFPA2D对动载荷作用下岩石的破裂过程进行数值模拟,发现与理论结果总体趋势吻合良好。
关 键 词: 断裂力学;应力波;RFPA2D;节理岩体
Title: Study of rock crack extension under dynamic and static stress
Author: SHI Fang, GAO Feng
Organization: School of Mechanics and Civil Engineering, China University of Mining & Technology; State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology
Abstract: In this paper, fracture growth rules under strong stress wave action are researched by the derivation of the crack initiation angle function and fracture growth angle function under dynamic and static stress. The result is obviously different from the situation that has only static stress. Instantaneous changes in crack propagation speed will increase the complexity of the extended orientation. At last, the function�s accuracy is confirmed with the aid of the RFPA2D software, which can simulate the failure process of jointed rock under dynamic stress.
Key words: fracture mechanics; stress wave; RFPA2D; jointed rock
发表期数: 2011年8月第15期
引用格式: 师访,高峰. 动静组合应力作用下岩石裂纹扩展行为研究[J]. 中国科技论文在线精品论文,2011,4(15):1398-1402.
 
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