Numerical Analysis of Fracture Behaviour on Marble Samples Containing Two Flaws
Uniaxial compression tests were conducted on marble specimens containing two flaws. There are coplanar flaws and noncoplanar flaws. The inclination angle and spacing of flaws were considered of the coplanar flaws model, and the step angle and spacing of flaws were considered of the noncoplanar flaws...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/6278289 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849401323703762944 |
|---|---|
| author | Lifei Zheng Dan Huang Xiaoqing Li Xuan Hu |
| author_facet | Lifei Zheng Dan Huang Xiaoqing Li Xuan Hu |
| author_sort | Lifei Zheng |
| collection | DOAJ |
| description | Uniaxial compression tests were conducted on marble specimens containing two flaws. There are coplanar flaws and noncoplanar flaws. The inclination angle and spacing of flaws were considered of the coplanar flaws model, and the step angle and spacing of flaws were considered of the noncoplanar flaws model. Strength failure and crack coalescence behaviour were analysed in the paper. The crack evolution process containing microcrack initiation, coalescence, and failure is focused on the rock bridge coalescence and the extent of the pre-existing flaws. There are four forms of rock bridge coalescence: tensile crack coalescence, shear crack coalescence, mixed tensile and shear crack coalescence, and no coalescence. Also, there are four forms of the rock failure mode: tensile failure, shear failure, mixed tensile and shear failure, and split fracture. The outer end of the critical stress values were used to compare with the crack initiation strengths, and the crack initiation strengths were slightly larger than the critical stress. In addition, energy dissipation laws were analysed during the model fracturing process. The crack evolution mechanisms around the pre-existing flaw in the model were revealed by the distribution of microcrack and energy dissipation. |
| format | Article |
| id | doaj-art-8573cc79b28c4a2f843f498c9c9b628e |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-8573cc79b28c4a2f843f498c9c9b628e2025-08-20T03:37:47ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/62782896278289Numerical Analysis of Fracture Behaviour on Marble Samples Containing Two FlawsLifei Zheng0Dan Huang1Xiaoqing Li2Xuan Hu3School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, ChinaUniaxial compression tests were conducted on marble specimens containing two flaws. There are coplanar flaws and noncoplanar flaws. The inclination angle and spacing of flaws were considered of the coplanar flaws model, and the step angle and spacing of flaws were considered of the noncoplanar flaws model. Strength failure and crack coalescence behaviour were analysed in the paper. The crack evolution process containing microcrack initiation, coalescence, and failure is focused on the rock bridge coalescence and the extent of the pre-existing flaws. There are four forms of rock bridge coalescence: tensile crack coalescence, shear crack coalescence, mixed tensile and shear crack coalescence, and no coalescence. Also, there are four forms of the rock failure mode: tensile failure, shear failure, mixed tensile and shear failure, and split fracture. The outer end of the critical stress values were used to compare with the crack initiation strengths, and the crack initiation strengths were slightly larger than the critical stress. In addition, energy dissipation laws were analysed during the model fracturing process. The crack evolution mechanisms around the pre-existing flaw in the model were revealed by the distribution of microcrack and energy dissipation.http://dx.doi.org/10.1155/2020/6278289 |
| spellingShingle | Lifei Zheng Dan Huang Xiaoqing Li Xuan Hu Numerical Analysis of Fracture Behaviour on Marble Samples Containing Two Flaws Advances in Civil Engineering |
| title | Numerical Analysis of Fracture Behaviour on Marble Samples Containing Two Flaws |
| title_full | Numerical Analysis of Fracture Behaviour on Marble Samples Containing Two Flaws |
| title_fullStr | Numerical Analysis of Fracture Behaviour on Marble Samples Containing Two Flaws |
| title_full_unstemmed | Numerical Analysis of Fracture Behaviour on Marble Samples Containing Two Flaws |
| title_short | Numerical Analysis of Fracture Behaviour on Marble Samples Containing Two Flaws |
| title_sort | numerical analysis of fracture behaviour on marble samples containing two flaws |
| url | http://dx.doi.org/10.1155/2020/6278289 |
| work_keys_str_mv | AT lifeizheng numericalanalysisoffracturebehaviouronmarblesamplescontainingtwoflaws AT danhuang numericalanalysisoffracturebehaviouronmarblesamplescontainingtwoflaws AT xiaoqingli numericalanalysisoffracturebehaviouronmarblesamplescontainingtwoflaws AT xuanhu numericalanalysisoffracturebehaviouronmarblesamplescontainingtwoflaws |