Fracture mechanisms of intact rock-like materials under compression

Zhao，Haiyang1; Zhang，Liangchi2,3,4; Wu，Zhonghuai1; Liu，Ang1

2022-08-01

10.1016/j.compgeo.2022.104845

COMPUTERS AND GEOTECHNICS   影响因子和分区

0266-352X

1873-7633

The fracture mechanism in natural rock is closely related to the nucleation and interaction of microcracks. However, a comprehensive understanding of the crack evolution in intact rocks remains unclear. This paper presents a systematic investigation on the microcrack nucleation, coalescence and propagation in conjunction with detailed characterization of local stress distribution and bond strength information by means of the discrete element-based modelling. It was found that crack initiation dominates at the elastic stage and crack coalescence takes control at the unstable crack growth stage. Crack growth in both the stages is sensitive to the local heterogeneity of the sample and local stress distribution. In the post-peak regime, crack growth becomes intensified and localised, forming the shear zone and leading to a complete disintegration of a sample.

Discrete element modelling Fracture mechanism Local stress Rock heterogeneity Rock-like material

SCI ; EI

英语

通讯

Guangdong Specific Discipline Project[2020ZDZX2006] ; Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics Project[ZDSYS20200810171 201007]

Computer Science ; Engineering ; Geology

Computer Science, Interdisciplinary Applications ; Engineering, Geological ; Geosciences, Multidisciplinary

WOS:000808843000001

ELSEVIER SCI LTD

20222312195281

Coalescence ; Fracture ; Microcracks ; Nucleation ; Rocks ; Stress concentration

Colloid Chemistry:801.3 ; Chemical Operations:802.3 ; Crystal Growth:933.1.2 ; Materials Science:951

COMPUTER SCIENCE

2-s2.0-85131223725

Scopus

1.School of Mechanical and Manufacturing Engineering,University of New South Wales,2052,Australia
2.Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
4.SUSTech Institute for Manufacturing Innovation,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Zhao，Haiyang,Zhang，Liangchi,Wu，Zhonghuai,et al. Fracture mechanisms of intact rock-like materials under compression[J]. COMPUTERS AND GEOTECHNICS,2022,148.

Zhao，Haiyang,Zhang，Liangchi,Wu，Zhonghuai,&Liu，Ang.(2022).Fracture mechanisms of intact rock-like materials under compression.COMPUTERS AND GEOTECHNICS,148.

Zhao，Haiyang,et al."Fracture mechanisms of intact rock-like materials under compression".COMPUTERS AND GEOTECHNICS 148(2022).