EXPERIMENTAL STUDY OF FAILURE CHARACTERISTICS OF ROCK CONTAINING FLAW UNDER CYCLIC LOADING
HU Shengbin1，2，DENG Jian2，MA Chunde2，WANG Weihua2
(1. Guangdong Provincial General Station for Supervision and Examination of Quality and Safety of Construction Engineering，Guangzhou，Guangdong 510075，China；2. School of Resources and Safety Engineering，Central South University， Changsha，Hunan 410083，China)
Abstract：Experimental study of failure characteristics of rock containing flaw under cyclic loading is carried out by using similarity materials. The similarity materials are elaborately designed by cement mortar and filling materials to simulate rocks with hole，flexible filling，or rigid filling. The characteristics of rocks containing flaw for the low-cycle fatigue damage are observed；and the three stages of the irreversible uniaxial deformation process are presented. Different defects in rock-like materials have great influence on their fatigue life and initiation and propagation of fatigue cracks. Experimental results show that the uniaxial deformation can be divided into three stages：initial deformation stage，constant-speed deformation stage，and acceleration deformation stage. Fatigue cracks are prone to initiate and propagate on the interface of defective and basis materials，where stress is concentrated. Conclusion can be made that with the same load conditions and the same sizes of flaw，the greater diameter of the hole is，the shorter fatigue life of hole-defect specimen is. It is also found that the fatigue lives of rigid-filling specimens are the shortest；the hole specimens take the second place；flexible-filling specimens have the longest life.
胡盛斌,邓建，马春德，王卫华. 循环荷载作用下含缺陷岩石破坏特征试验研究[J]. 岩石力学与工程学报, 2009, 28(12): 2490-2495.
HU Shengbin1，2，DENG Jian2，MA Chunde2，WANG Weihua2. EXPERIMENTAL STUDY OF FAILURE CHARACTERISTICS OF ROCK CONTAINING FLAW UNDER CYCLIC LOADING. , 2009, 28(12): 2490-2495.
