An innovative micromechanics-based three-dimensional long-term strength criterion for fracture assessment of rock materials
Rocks may exhibit time-dependent behaviors. Long-term strength criterion significantly dominates creep failure of rocks. Rocks contain many microcracks, which lead to degrade of long-term strength. In this paper, it is assumed that there exist three-dimensional penny-shaped microcracks in rocks. The...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2018-03-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2015 |
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| author | xiaoping zhou Xiaocheng Huang Filippo Berto |
| author_facet | xiaoping zhou Xiaocheng Huang Filippo Berto |
| author_sort | xiaoping zhou |
| collection | DOAJ |
| description | Rocks may exhibit time-dependent behaviors. Long-term strength criterion significantly dominates creep failure of rocks. Rocks contain many microcracks, which lead to degrade of long-term strength. In this paper, it is assumed that there exist three-dimensional penny-shaped microcracks in rocks. The mode II stress intensity factors at tips of three-dimensional penny-shaped microcracks in Burgers viscoelastic rock matrix is derived. A novel micromechanics-based three-dimensional long-term strength criterion is established to consider the effects of time and the intermediate principal stress on creep failure of rocks. By comparison with the previous experimental data, it is found that the novel micromechanics-based three-dimensional long-term strength criterion is in good agreement with the experimental data. |
| format | Article |
| id | doaj-art-77060a61004a47f1b2fe231b740929ad |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2018-03-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-77060a61004a47f1b2fe231b740929ad2025-01-03T01:03:09ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932018-03-011244An innovative micromechanics-based three-dimensional long-term strength criterion for fracture assessment of rock materialsxiaoping zhou0Xiaocheng Huang1Filippo Berto2School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaDepartment of Mechanical Engineering, Norwegian University of Science and Technology, Trondheim 7491, NorwayRocks may exhibit time-dependent behaviors. Long-term strength criterion significantly dominates creep failure of rocks. Rocks contain many microcracks, which lead to degrade of long-term strength. In this paper, it is assumed that there exist three-dimensional penny-shaped microcracks in rocks. The mode II stress intensity factors at tips of three-dimensional penny-shaped microcracks in Burgers viscoelastic rock matrix is derived. A novel micromechanics-based three-dimensional long-term strength criterion is established to consider the effects of time and the intermediate principal stress on creep failure of rocks. By comparison with the previous experimental data, it is found that the novel micromechanics-based three-dimensional long-term strength criterion is in good agreement with the experimental data.https://www.fracturae.com/index.php/fis/article/view/2015Micromechanics-based three-dimensional long-term strength criterionBurgers viscoelastic rock matrixthree-dimensional penny-shaped creep microcracksStress intensity factorThe intermediate principal stress |
| spellingShingle | xiaoping zhou Xiaocheng Huang Filippo Berto An innovative micromechanics-based three-dimensional long-term strength criterion for fracture assessment of rock materials Fracture and Structural Integrity Micromechanics-based three-dimensional long-term strength criterion Burgers viscoelastic rock matrix three-dimensional penny-shaped creep microcracks Stress intensity factor The intermediate principal stress |
| title | An innovative micromechanics-based three-dimensional long-term strength criterion for fracture assessment of rock materials |
| title_full | An innovative micromechanics-based three-dimensional long-term strength criterion for fracture assessment of rock materials |
| title_fullStr | An innovative micromechanics-based three-dimensional long-term strength criterion for fracture assessment of rock materials |
| title_full_unstemmed | An innovative micromechanics-based three-dimensional long-term strength criterion for fracture assessment of rock materials |
| title_short | An innovative micromechanics-based three-dimensional long-term strength criterion for fracture assessment of rock materials |
| title_sort | innovative micromechanics based three dimensional long term strength criterion for fracture assessment of rock materials |
| topic | Micromechanics-based three-dimensional long-term strength criterion Burgers viscoelastic rock matrix three-dimensional penny-shaped creep microcracks Stress intensity factor The intermediate principal stress |
| url | https://www.fracturae.com/index.php/fis/article/view/2015 |
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