Investigation on the Failure Mechanisms in Sandstones under Uniaxial Compression by Digital Image Correlation
Sandstone samples have been compressed uniaxially till failure.The displacement field during the deformation process has been obtained by digital image correlation (DIC) technique.It has been observed that the rock samples ruptured through splitting parallel to the compression direction,as conventional experiments indicated.But upon analyzing the apparent strain field,no sliding cracks or shear cracks have been found that are suggested to drive the splitting failure.Instead,deformation band like structure has been detected.The splitting failure has been observed to be the direct result of the localization of the some scattered small cracks.The micromechanism underlying may be the buckling of force chains that induces delamination between them.
uniaxial compression failure mechanism sandstone digital image correlation
Ganyun Huang Hao Zhang Haipeng Song Yilan Kang
Department of Mechanics,Tianjin University,Tianjin 300072,China
国际会议
北京
英文
1-6
2013-06-16(万方平台首次上网日期,不代表论文的发表时间)