TESTING STUDY ON FATIGUE DEFORMATION LAW OF ROCK UNDER CYCLIC LOADING
Ge Xiurun1,2,Jiang Yu2,3,Lu Yunde2,Ren Jianxi2 (1Institute of Rock and Soil Mechanics,The Chinese Academy of Sciences, Wuhan 430071 China ) (2Shanghai Jiaotong University, Shanghai 200030 China) (3 Shanghai Branch,Hebei Provincial Architectural Design Research Institute, Shanghai 200125 China)
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.
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.