Influence of Microscopic Parameters on the Stress-Strain Relation in Rocks
Macromaterial properties should correspond to the mesoscopic parameters simulated in practical engineering problems. Discrete element contains a variety of particle models and its corresponding mesoscopic parameters, and the one-to-one relationship between the mesoscopic parameters and macroscopic p...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/7050468 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832568401382342656 |
|---|---|
| author | Yanhui Cheng Weijun Yang |
| author_facet | Yanhui Cheng Weijun Yang |
| author_sort | Yanhui Cheng |
| collection | DOAJ |
| description | Macromaterial properties should correspond to the mesoscopic parameters simulated in practical engineering problems. Discrete element contains a variety of particle models and its corresponding mesoscopic parameters, and the one-to-one relationship between the mesoscopic parameters and macroscopic parameters is difficult to establish. This paper studies the influence of microscopical characteristic parameters, such as particle contact stiffness ratio, parallel bond stiffness ratio, particle contact modulus, and parallel bond elastic modulus, on the stress-strain relation in rocks, which shows that (1) The range of particle contact stiffness ratio kn/ks largely varies, but the stress-strain relation curve is relatively small. The particle contact stiffness has less influence on the elastic modulus of the simulated specimens than kn/ks. (2) Before the failure of the specimen, the axial strain corresponding to the peak compressive strength increases with the increase in the stiffness ratio kn¯/ks¯ of the parallel bond. (3) The particle contact modulus Ec has a great influence on the elastic modulus of sandstone and is characterized by the increase in the particle contact modulus Ec, corresponding axial strain for the peak compressive strength decreases, and the slope of the stress-strain relationship curves before damage increases. (4) The elastic modulus of the parallel bond greatly influences the uniaxial compressive strength, and the relationship between them is proportional. |
| format | Article |
| id | doaj-art-fe0ea117867f468ea16f8f58650ff300 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-fe0ea117867f468ea16f8f58650ff3002025-02-03T00:59:12ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/70504687050468Influence of Microscopic Parameters on the Stress-Strain Relation in RocksYanhui Cheng0Weijun Yang1School of Civil Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaSchool of Civil Engineering, Changsha University of Science and Technology, Changsha 410114, ChinaMacromaterial properties should correspond to the mesoscopic parameters simulated in practical engineering problems. Discrete element contains a variety of particle models and its corresponding mesoscopic parameters, and the one-to-one relationship between the mesoscopic parameters and macroscopic parameters is difficult to establish. This paper studies the influence of microscopical characteristic parameters, such as particle contact stiffness ratio, parallel bond stiffness ratio, particle contact modulus, and parallel bond elastic modulus, on the stress-strain relation in rocks, which shows that (1) The range of particle contact stiffness ratio kn/ks largely varies, but the stress-strain relation curve is relatively small. The particle contact stiffness has less influence on the elastic modulus of the simulated specimens than kn/ks. (2) Before the failure of the specimen, the axial strain corresponding to the peak compressive strength increases with the increase in the stiffness ratio kn¯/ks¯ of the parallel bond. (3) The particle contact modulus Ec has a great influence on the elastic modulus of sandstone and is characterized by the increase in the particle contact modulus Ec, corresponding axial strain for the peak compressive strength decreases, and the slope of the stress-strain relationship curves before damage increases. (4) The elastic modulus of the parallel bond greatly influences the uniaxial compressive strength, and the relationship between them is proportional.http://dx.doi.org/10.1155/2018/7050468 |
| spellingShingle | Yanhui Cheng Weijun Yang Influence of Microscopic Parameters on the Stress-Strain Relation in Rocks Advances in Civil Engineering |
| title | Influence of Microscopic Parameters on the Stress-Strain Relation in Rocks |
| title_full | Influence of Microscopic Parameters on the Stress-Strain Relation in Rocks |
| title_fullStr | Influence of Microscopic Parameters on the Stress-Strain Relation in Rocks |
| title_full_unstemmed | Influence of Microscopic Parameters on the Stress-Strain Relation in Rocks |
| title_short | Influence of Microscopic Parameters on the Stress-Strain Relation in Rocks |
| title_sort | influence of microscopic parameters on the stress strain relation in rocks |
| url | http://dx.doi.org/10.1155/2018/7050468 |
| work_keys_str_mv | AT yanhuicheng influenceofmicroscopicparametersonthestressstrainrelationinrocks AT weijunyang influenceofmicroscopicparametersonthestressstrainrelationinrocks |