Fracture mechanisms of intact rock-like materials under compression

Haiyang Zhao; Liangchi Zhang; Zhonghuai Wu; Ang Liu

doi:10.1016/j.compgeo.2022.104845

Fracture mechanisms of intact rock-like materials under compression

Haiyang Zhao, Liangchi Zhang^*, Zhonghuai Wu, Ang Liu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

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.

Original language	English
Article number	104845
Journal	Computers and Geotechnics
Volume	148
DOIs	https://doi.org/10.1016/j.compgeo.2022.104845
Publication status	Published - Aug 2022
Externally published	Yes

Keywords

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

Access to Document

10.1016/j.compgeo.2022.104845

Cite this

@article{9756c44698c8406fa4b76bf49cc1a89f,

title = "Fracture mechanisms of intact rock-like materials under compression",

abstract = "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.",

keywords = "Discrete element modelling, Fracture mechanism, Local stress, Rock heterogeneity, Rock-like material",

author = "Haiyang Zhao and Liangchi Zhang and Zhonghuai Wu and Ang Liu",

note = "Publisher Copyright: {\textcopyright} 2022",

year = "2022",

month = aug,

doi = "10.1016/j.compgeo.2022.104845",

language = "English",

volume = "148",

journal = "Computers and Geotechnics",

issn = "0266-352X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Fracture mechanisms of intact rock-like materials under compression

AU - Zhao, Haiyang

AU - Zhang, Liangchi

AU - Wu, Zhonghuai

AU - Liu, Ang

PY - 2022/8

Y1 - 2022/8

N2 - 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.

AB - 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.

KW - Discrete element modelling

KW - Fracture mechanism

KW - Local stress

KW - Rock heterogeneity

KW - Rock-like material

UR - http://www.scopus.com/inward/record.url?scp=85131223725&partnerID=8YFLogxK

U2 - 10.1016/j.compgeo.2022.104845

DO - 10.1016/j.compgeo.2022.104845

M3 - Article

AN - SCOPUS:85131223725

SN - 0266-352X

VL - 148

JO - Computers and Geotechnics

JF - Computers and Geotechnics

M1 - 104845

ER -

Fracture mechanisms of intact rock-like materials under compression

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this