Mechanical Properties Damage, Fracture Evolution, and Constitutive Model of Siltstone under the Effect of Moisture Content
In order to study the weakening mechanism of mechanical properties and the evolution of fracture of water-bearing rocks, cylindrical standard siltstone samples with four moisture contents (0, 2.85, 3.87, and 4.25%) were prepared, and the mechanical properties, damage mode, AE characteristics, and fr...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2022/8599808 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849470533475762176 |
|---|---|
| author | Weinan Wang Qiangling Yao Chuanjin Tang Haitao Li Hengyi Liu Changhao Shan |
| author_facet | Weinan Wang Qiangling Yao Chuanjin Tang Haitao Li Hengyi Liu Changhao Shan |
| author_sort | Weinan Wang |
| collection | DOAJ |
| description | In order to study the weakening mechanism of mechanical properties and the evolution of fracture of water-bearing rocks, cylindrical standard siltstone samples with four moisture contents (0, 2.85, 3.87, and 4.25%) were prepared, and the mechanical properties, damage mode, AE characteristics, and fractal law of water-bearing rock samples were studied by means of uniaxial compression test and acoustic emission (AE) monitoring technique, and based on the test findings, a constitutive model of the entire process of rock deformation and damage under uniaxial compression was built with different moisture content of rock. The results show that with the increase of moisture content, the peak stress, the stress threshold of void compaction stage, and the stress threshold of elastic stage of the rock samples decreased linearly, elastic modulus decreased exponentially as a function, and the peak strain, the strain threshold of void compaction stage, and the strain threshold of elastic stage increased linearly. The higher the moisture content, the weaker the AE signal intensity and the smaller the AE count value. From dry to saturated, the damage form of rock samples gradually transitioned from predominantly tensile damage to predominantly shear damage. The fractal dimension of the broken block linearly decreases as the moisture content rises. The model constructed in this paper has good applicability to the deformation characteristics of water-bearing rocks under uniaxial compression before the peak stress; it especially can express the rock void compaction stage, but it cannot accurately describe the postpeak deformation characteristics. |
| format | Article |
| id | doaj-art-ce926ce0310a4b9db7fb7a89ed9fb328 |
| institution | Kabale University |
| issn | 1468-8123 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-ce926ce0310a4b9db7fb7a89ed9fb3282025-08-20T03:25:08ZengWileyGeofluids1468-81232022-01-01202210.1155/2022/8599808Mechanical Properties Damage, Fracture Evolution, and Constitutive Model of Siltstone under the Effect of Moisture ContentWeinan Wang0Qiangling Yao1Chuanjin Tang2Haitao Li3Hengyi Liu4Changhao Shan5School of MinesSchool of MinesDepartment of Civil EngineeringSchool of MinesSchool of MinesSchool of MinesIn order to study the weakening mechanism of mechanical properties and the evolution of fracture of water-bearing rocks, cylindrical standard siltstone samples with four moisture contents (0, 2.85, 3.87, and 4.25%) were prepared, and the mechanical properties, damage mode, AE characteristics, and fractal law of water-bearing rock samples were studied by means of uniaxial compression test and acoustic emission (AE) monitoring technique, and based on the test findings, a constitutive model of the entire process of rock deformation and damage under uniaxial compression was built with different moisture content of rock. The results show that with the increase of moisture content, the peak stress, the stress threshold of void compaction stage, and the stress threshold of elastic stage of the rock samples decreased linearly, elastic modulus decreased exponentially as a function, and the peak strain, the strain threshold of void compaction stage, and the strain threshold of elastic stage increased linearly. The higher the moisture content, the weaker the AE signal intensity and the smaller the AE count value. From dry to saturated, the damage form of rock samples gradually transitioned from predominantly tensile damage to predominantly shear damage. The fractal dimension of the broken block linearly decreases as the moisture content rises. The model constructed in this paper has good applicability to the deformation characteristics of water-bearing rocks under uniaxial compression before the peak stress; it especially can express the rock void compaction stage, but it cannot accurately describe the postpeak deformation characteristics.http://dx.doi.org/10.1155/2022/8599808 |
| spellingShingle | Weinan Wang Qiangling Yao Chuanjin Tang Haitao Li Hengyi Liu Changhao Shan Mechanical Properties Damage, Fracture Evolution, and Constitutive Model of Siltstone under the Effect of Moisture Content Geofluids |
| title | Mechanical Properties Damage, Fracture Evolution, and Constitutive Model of Siltstone under the Effect of Moisture Content |
| title_full | Mechanical Properties Damage, Fracture Evolution, and Constitutive Model of Siltstone under the Effect of Moisture Content |
| title_fullStr | Mechanical Properties Damage, Fracture Evolution, and Constitutive Model of Siltstone under the Effect of Moisture Content |
| title_full_unstemmed | Mechanical Properties Damage, Fracture Evolution, and Constitutive Model of Siltstone under the Effect of Moisture Content |
| title_short | Mechanical Properties Damage, Fracture Evolution, and Constitutive Model of Siltstone under the Effect of Moisture Content |
| title_sort | mechanical properties damage fracture evolution and constitutive model of siltstone under the effect of moisture content |
| url | http://dx.doi.org/10.1155/2022/8599808 |
| work_keys_str_mv | AT weinanwang mechanicalpropertiesdamagefractureevolutionandconstitutivemodelofsiltstoneundertheeffectofmoisturecontent AT qianglingyao mechanicalpropertiesdamagefractureevolutionandconstitutivemodelofsiltstoneundertheeffectofmoisturecontent AT chuanjintang mechanicalpropertiesdamagefractureevolutionandconstitutivemodelofsiltstoneundertheeffectofmoisturecontent AT haitaoli mechanicalpropertiesdamagefractureevolutionandconstitutivemodelofsiltstoneundertheeffectofmoisturecontent AT hengyiliu mechanicalpropertiesdamagefractureevolutionandconstitutivemodelofsiltstoneundertheeffectofmoisturecontent AT changhaoshan mechanicalpropertiesdamagefractureevolutionandconstitutivemodelofsiltstoneundertheeffectofmoisturecontent |