Study on mechanical and fracture characteristics of rock-like specimens with rough non-persistent joints by YADE DEM simulation. (June 2023)

• Record Type: Journal Article
• Authors: Wang, Benxin; Gerolymatou, Eleni; Jin, Aibing
• Is Part Of: Computers and geotechnics. Volume 158(2023)
• Publication Date: 2023-06
• Subjects: Rough non-persistent joints -- DEM -- Crack coalescence -- Fracture mechanism; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2023.105382
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: Rough non-persistent joints exist widely in natural rock mass. The roughness of joints influences its mechanical and fracture characteristics. However, the research on rough non-persistent jointed rock mass is inadequate. To investigate the effects of joint angle, rock bridge angle and roughness of rough non-persistent joints, the rough non-persistent joints were truncated and their J R C was calibrated based on the Barton typical roughness profiles. A series of DEM numerical uniaxial compression tests were conducted based on the laboratory tests of rock-like specimens with 3D printed non-persistent joints. By the investigation of mechanical behaviour, crack coalescence types, crack evolution law, fracture modes presented by the strain field, and micro-fracture mechanism revealed by the displacement vectors, it was verified that YADE is suitable to simulate the fracture of rough non-persistent jointed specimens; the six types of coalescence of rough non-persistent joints were concluded, and the relation between micro-crack and macro-fracture was established by the four types of micro-cracks causing macro-fractures. Graphical abstract: Highlights: It was verified that YADE is suitable to investigate the rough jointed rock. The variation of UCS with joint angle, rock bridge angle and JRC is defined respectively. The micro-cracks causing macro-fracture were divided into four types DS, DT, OS and ST.