Modeling of brittle rock failure considering inter- and intra-grain contact failures

作者：Wang, Xin; Cai, Ming^*

来源：Computers and Geotechnics, 2018, 101: 224-244.

DOI：10.1016/j.compgeo.2018.04.016

• Grain-based model
• Inter-grain
• Intra-grain
• Contact strength heterogeneity
• Brittle rock failure

Based on a two-scale tessellation technique in Neper, a 3DEC-GBM modeling approach considering inter- and intra-grain contact failures is proposed to study brittle rock failure. Plane strain problems are solved using 3DEC to reduce computation time. A parametric study of inter- and intra-grain contact properties is conducted and a calibration procedure is suggested for determining micro-mechanical properties of granular materials. The modeling results indicate that inter- and intra-grain contact strength heterogeneity affects not only the peak strength of rock but also the microcrack spatial location and hence the fracture development path and fracture pattern.

• 出版日期2018-9
• 单位东北大学