Experimental and Numerical Investigations of Fracture Behavior for Transversely Isotropic Slate Using Semi-Circular Bend Method
Slate with inherently transverse isotropy is abundant in metamorphic rock, in buildings, and in geotechnical engineering worldwide; the tensile and shear fracture behavior of layered slate is vital to know for engineering applications. In this paper, the Brazilian and semi-circular bend (SCB) tests...
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MDPI AG
2023-02-01
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| author | Erqiang Li Yanqing Wei Zhanyang Chen Longfei Zhang |
| author_facet | Erqiang Li Yanqing Wei Zhanyang Chen Longfei Zhang |
| author_sort | Erqiang Li |
| collection | DOAJ |
| description | Slate with inherently transverse isotropy is abundant in metamorphic rock, in buildings, and in geotechnical engineering worldwide; the tensile and shear fracture behavior of layered slate is vital to know for engineering applications. In this paper, the Brazilian and semi-circular bend (SCB) tests of layered slate were performed. The fracture characteristics of the slate were investigated by numerical simulations developed by the hybrid finite and cohesive element method (FCEM). Results showed that the measured experimental tensile strength, and mode I fracture toughness of layered slate all showed a typical V-type trend as the bedding angle increased from 0° to 90°, and with divider type. The developed empirical relationship between tensile fracture toughness and tensile strength <i>K<sub>IC</sub></i> = 0.094<i>σ<sub>t</sub></i> + 0.036 fitted experimentally and strongly correlated. The mechanical response and fracture patterns predicted by FCEM agreed well with those of the laboratory experiments. Moreover, the shear fracture behavior and mode II fracture toughness of the layered slate were explored by systematic numerical simulations. Research results provide potential insights for further prediction and improvement of the complex fracture behavior of anisotropic rock masses for rock engineering. |
| first_indexed | 2024-03-11T09:11:46Z |
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| id | doaj.art-2eb4982f398b49ad84fca8e49621a234 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T09:11:46Z |
| publishDate | 2023-02-01 |
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| spelling | doaj.art-2eb4982f398b49ad84fca8e49621a2342023-11-16T18:55:28ZengMDPI AGApplied Sciences2076-34172023-02-01134241810.3390/app13042418Experimental and Numerical Investigations of Fracture Behavior for Transversely Isotropic Slate Using Semi-Circular Bend MethodErqiang Li0Yanqing Wei1Zhanyang Chen2Longfei Zhang3School of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, ChinaSchool of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, ChinaSchool of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan 467036, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology Beijing, Beijing 100083, ChinaSlate with inherently transverse isotropy is abundant in metamorphic rock, in buildings, and in geotechnical engineering worldwide; the tensile and shear fracture behavior of layered slate is vital to know for engineering applications. In this paper, the Brazilian and semi-circular bend (SCB) tests of layered slate were performed. The fracture characteristics of the slate were investigated by numerical simulations developed by the hybrid finite and cohesive element method (FCEM). Results showed that the measured experimental tensile strength, and mode I fracture toughness of layered slate all showed a typical V-type trend as the bedding angle increased from 0° to 90°, and with divider type. The developed empirical relationship between tensile fracture toughness and tensile strength <i>K<sub>IC</sub></i> = 0.094<i>σ<sub>t</sub></i> + 0.036 fitted experimentally and strongly correlated. The mechanical response and fracture patterns predicted by FCEM agreed well with those of the laboratory experiments. Moreover, the shear fracture behavior and mode II fracture toughness of the layered slate were explored by systematic numerical simulations. Research results provide potential insights for further prediction and improvement of the complex fracture behavior of anisotropic rock masses for rock engineering.https://www.mdpi.com/2076-3417/13/4/2418bedding planelayered slatesemi-circular bendcohesive zone modelfracture behavior |
| spellingShingle | Erqiang Li Yanqing Wei Zhanyang Chen Longfei Zhang Experimental and Numerical Investigations of Fracture Behavior for Transversely Isotropic Slate Using Semi-Circular Bend Method Applied Sciences bedding plane layered slate semi-circular bend cohesive zone model fracture behavior |
| title | Experimental and Numerical Investigations of Fracture Behavior for Transversely Isotropic Slate Using Semi-Circular Bend Method |
| title_full | Experimental and Numerical Investigations of Fracture Behavior for Transversely Isotropic Slate Using Semi-Circular Bend Method |
| title_fullStr | Experimental and Numerical Investigations of Fracture Behavior for Transversely Isotropic Slate Using Semi-Circular Bend Method |
| title_full_unstemmed | Experimental and Numerical Investigations of Fracture Behavior for Transversely Isotropic Slate Using Semi-Circular Bend Method |
| title_short | Experimental and Numerical Investigations of Fracture Behavior for Transversely Isotropic Slate Using Semi-Circular Bend Method |
| title_sort | experimental and numerical investigations of fracture behavior for transversely isotropic slate using semi circular bend method |
| topic | bedding plane layered slate semi-circular bend cohesive zone model fracture behavior |
| url | https://www.mdpi.com/2076-3417/13/4/2418 |
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