Internal stress distribution and cracking around flaws and openings of rock block under uniaxial compression: A particle mechanics approach. (October 2018)

• Record Type: Journal Article
• Authors: Fan, Xiang; Li, Kaihui; Lai, Hongpeng; Xie, Yongli; Cao, Rihong; Zheng, Jun
• Is Part Of: Computers and geotechnics. Volume 102(2018)
• Page Start: 28
• Page End: 38
• Publication Date: 2018-10
• Subjects: Measurement sphere -- Bonded particle model -- Circular opening -- Flaw -- Principal stress; SHWF single-hole without flaw -- SHTF single-hole and two-flaw -- THWF two-hole without flaw -- THSF two-hole and single-flaw -- PFC particle flow code -- BPM bonded particle model -- N total number of all micro-cracks produced by tensile or shear failure -- Nt the number of tensile failure micro-cracks -- Ns the number of shear failure micro-cracks -- T tensile crack -- S shear crack -- SP spalling -- MS measurement sphere -- PSDZ principal stress distribution zone; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2018.06.002
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: Based on experimental results, bonded particle models containing flaws or/and openings were created to investigate the peak stress, crack-initiation stress, number of micro-cracks, local stress distribution and cracking behavior under uniaxial compression. It is found that flaws and openings are distinctly related to the peak stress, the crack-initiation stress and the number of micro-cracks. As the flaw inclination angle increases, the distributions of principal stresses surrounding a flaw vary, while those surrounding an opening present a similar shape with magnitude differences. The distribution of local stress well accounts for the cracking behavior.