Details
| Original language | English |
|---|---|
| Article number | 04021006 |
| Journal | International Journal of Geomechanics |
| Volume | 21 |
| Issue number | 3 |
| Early online date | 15 Jan 2021 |
| Publication status | Published - 1 Mar 2021 |
Abstract
The Brazilian splitting test is a broadly adopted testing procedure for characterizing the tensile strength of natural rock or rock-like material. However, the results of the Brazilian test on specimens with naturally existing voids and inclusions are strongly influenced by size effects and boundary conditions, and numerical modeling can assist in explaining and understanding the mechanisms. On the other hand, the potential of utilizing the Brazilian test to characterize inhomogeneous deformation of rock samples with voids and inclusions of dissimilar materials still awaits exploration. In the present study, fracture mechanisms in Brazilian disks with circular voids and filled inclusions are studied by using the phase field model (PFM). The finite element method is adopted to implement the PFM to study the influence of diameter, eccentricity, and quantity of the voids and inclusions on the fracture patterns and stress-strain curves. The phase field simulations can reproduce previous experimental phenomena and furthermore it deepens the understanding of the influence of inclusions and voids on the fracture pattern, overall strength, and deformation behavior of inhomogeneous rock. The findings in the study highlight the potential of characterizing inhomogeneous rock through combining Brazilian tests and numerical modeling.
Keywords
- Brazilian test, Crack propagation, Phase field, Rock fracture, Voids and inclusions
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
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In: International Journal of Geomechanics, Vol. 21, No. 3, 04021006, 01.03.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Phase Field Characterization of Rock Fractures in Brazilian Splitting Test Specimens Containing Voids and Inclusions
AU - Zhou, Shuwei
AU - Zhuang, Xiaoying
AU - Zhou, Jianming
AU - Liu, Fang
N1 - Funding Information: The authors gratefully acknowledge financial support provided by Deutsche Forschungsgemeinschaft (DFG ZH 459/3-1) and RISE-project BESTOFRAC (734370).
PY - 2021/3/1
Y1 - 2021/3/1
N2 - The Brazilian splitting test is a broadly adopted testing procedure for characterizing the tensile strength of natural rock or rock-like material. However, the results of the Brazilian test on specimens with naturally existing voids and inclusions are strongly influenced by size effects and boundary conditions, and numerical modeling can assist in explaining and understanding the mechanisms. On the other hand, the potential of utilizing the Brazilian test to characterize inhomogeneous deformation of rock samples with voids and inclusions of dissimilar materials still awaits exploration. In the present study, fracture mechanisms in Brazilian disks with circular voids and filled inclusions are studied by using the phase field model (PFM). The finite element method is adopted to implement the PFM to study the influence of diameter, eccentricity, and quantity of the voids and inclusions on the fracture patterns and stress-strain curves. The phase field simulations can reproduce previous experimental phenomena and furthermore it deepens the understanding of the influence of inclusions and voids on the fracture pattern, overall strength, and deformation behavior of inhomogeneous rock. The findings in the study highlight the potential of characterizing inhomogeneous rock through combining Brazilian tests and numerical modeling.
AB - The Brazilian splitting test is a broadly adopted testing procedure for characterizing the tensile strength of natural rock or rock-like material. However, the results of the Brazilian test on specimens with naturally existing voids and inclusions are strongly influenced by size effects and boundary conditions, and numerical modeling can assist in explaining and understanding the mechanisms. On the other hand, the potential of utilizing the Brazilian test to characterize inhomogeneous deformation of rock samples with voids and inclusions of dissimilar materials still awaits exploration. In the present study, fracture mechanisms in Brazilian disks with circular voids and filled inclusions are studied by using the phase field model (PFM). The finite element method is adopted to implement the PFM to study the influence of diameter, eccentricity, and quantity of the voids and inclusions on the fracture patterns and stress-strain curves. The phase field simulations can reproduce previous experimental phenomena and furthermore it deepens the understanding of the influence of inclusions and voids on the fracture pattern, overall strength, and deformation behavior of inhomogeneous rock. The findings in the study highlight the potential of characterizing inhomogeneous rock through combining Brazilian tests and numerical modeling.
KW - Brazilian test
KW - Crack propagation
KW - Phase field
KW - Rock fracture
KW - Voids and inclusions
UR - http://www.scopus.com/inward/record.url?scp=85099504997&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2309.03909
DO - 10.48550/arXiv.2309.03909
M3 - Article
AN - SCOPUS:85099504997
VL - 21
JO - International Journal of Geomechanics
JF - International Journal of Geomechanics
SN - 1532-3641
IS - 3
M1 - 04021006
ER -