Crack growth in granite specimens subjected to cyclic uniazial loading
In order to examine the fatigue process of granite, a series of Westerly granite specimens were subjected to a cyclic loading test under the uniaxial compression with maximum 140 and 160MPa at room temperature. The development of microcracks within the specimens stressed to different characteristic stages was observed microscopically and their growth patterns were analyzed using image analysis technique. As a result, with increasing loading cycles, the number and the population of microcracks within the specimen increased. At the first stage of loading, many intragranular cracks generated. During the quasistable middle stage, many microcracks preferentially elongated parallel to the loading direction and grew into transgranular cracks. With further loading, cracks gradually widened, and some of them grew into intergranular cracks. It was estimated that the generation and growth of these intergranular cracks induced the rock fatigue failure.
Y.Chen K.Watanabe M.Kobayashi H.Kusuda E.Kusaka M.Mabuchi
Graduate School of Energy Science,Kyoto University,Kyoto,Japan
国际会议
International Symposium and The 7th Asian Regional Conference of IAEG(国际工程地质与环境协会年会暨第七届亚洲工程地质会议)
成都
英文
528-532
2009-09-09（万方平台首次上网日期，不代表论文的发表时间）