周期荷载作用下岩石疲劳变形特性试验研究  

TESTING STUDY ON FATIGUE DEFORMATION LAW OF ROCK UNDER CYCLIC LOADING

作　　者：葛修润[1] 蒋宇[2] 卢允德[2] 任建喜[2] 

机构地区：[1]中国科学院武汉岩土力学研究所,武汉430071 [2]上海交通大学建筑工程与力学学院

出　　处：《岩石力学与工程学报》2003年第10期1581-1585,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金(10172057;10202019)资助项目。

摘　　要：机理的较为系统的试验研究。试验结果表明,的变形量划分为初始变形阶段、等速变形阶段和加速变形阶段响岩石疲劳寿命的主要因素是周期荷载的上限应力和幅值。Testing study is made on the fatigue failure and deformation mechanism of sandstone and marble under uniaxial compression condition with rock mechanics test equipment RMT-150B. Testing result shows that the fatigue failure curve is controlled by complete stress-strain curve under static loading. The terminal strain of fatigue failure is equal to that of post-peak corresponding to the maximal cyclic load. The development of irreversible deformation can be divided into three phases, that is, initial phase, uniform velocity phase and accelerated phase. The accumulative deformation at three stages will lead to the final failure. The amplitude and maximum of cyclic load are the most important effect factors on fatigue lifespan of rock.

关 键 词：岩石力学 疲劳 周期荷载 不可逆变形 应力-应变全过程曲线 砂岩 大理岩 

分 类 号：TU458[建筑科学—岩土工程]