岩石疲劳破坏过程中的变形规律及声发射特性  

DEFORMATION RULES AND ACOUSTIC EMISSION CHARACTERISTICS OF ROCKS IN PROCESS OF FATIGUE FAILURE

作　　者：蒋宇[1] 葛修润[1] 任建喜[1] 

机构地区：[1]上海交通大学建筑工程与力学学院,上海200240

出　　处：《岩石力学与工程学报》2004年第11期1810-1814,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金(10172057)资助项目。

摘　　要：利用RMT-150B岩石力学试验系统和Locan 320声发射仪,研究了循环荷载作用下岩石疲劳破坏过程中的变形规律和声发射特征,揭示了两者之间的联系。从宏观不可逆变形和微观损伤的角度对岩石疲劳破坏过程进行了初步分析,确定了轴向变形的3阶段规律和横向变形的2阶段规律,论述了选择轴向变形作为宏观损伤参量的合理性。Deformation rules and acoustic emission characteristics of rocks in the process of fatigue failure are studied and the relation of them is revealed by using the rock mechanics test equipment named RMT-150B and Locan320 acoustic emission instrument. The elementary analysis for the process of fatigue failure of rock is carried out from the points of macroscopical irreversible deformation and microcosmic damage. In addition, three-stage laws of axial deformation and two-stage laws of radial deformation are established and the rationality to choose axial deformation as macroscopical damage parameter is also presented.

关 键 词：岩石力学 循环荷载 疲劳 声发射 

分 类 号：TU45[建筑科学—岩土工程]