The experimental study on fracture process of similar rock material with different ductility
The surface strain fields evolutions of three specimens similar to the rock material subjected to uniaxial compression, which are observed by digital speckle correlation method, are analyzed. The five typical moments of the sample destruction are selected for analysis. The shear strain fields at typical loading levels corresponding to the five typical moments are presented. The characteristics of the deformation fields are concluded. It is found that strain localization occurs earlier and becomes complicated, and the angle between the rupture surface and loading direction are bigger. The failure mode of specimen changes from macro-crack to the multiple crack, when ductility of specimens increases. Experimental results show that failure process and failure law of the similar material of rocks are quite different because of different toughness. So, different models need to be selected to obtain more realistic in numerical analysis.
mine rock similar rock materal ductility damage experimental
Cao Yanyan Ma Shaopeng Kang Yongjun Zhao Yonghong Zheng Yadong
Department of Mechanics, School of Aerospace Engineering, Beijing Institute of Technology, Beijing 1 School of Earth and Space Sciences. Peking University, Beijing 100871, China
国际会议
The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)
北京
英文
331-335
2011-10-27（万方平台首次上网日期，不代表论文的发表时间）