Micromechanism Underlying Nonlinear Stress-Dependent K0 of Clays at a Wide Range of Pressures
In order to investigate the mechanism underlying the reported nonlinear at-rest coefficient of earth pressure, K0 of clays at high pressure, a particle-scale model which can be used to calculate vertical and horizontal repulsion between clay particles has been proposed. This model has two initial st...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/540621 |
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| author | Xiang-yu Shang Chen Yang Guo-qing Zhou Xiu-zhong Zheng |
| author_facet | Xiang-yu Shang Chen Yang Guo-qing Zhou Xiu-zhong Zheng |
| author_sort | Xiang-yu Shang |
| collection | DOAJ |
| description | In order to investigate the mechanism underlying the reported nonlinear at-rest coefficient of earth pressure, K0 of clays at high pressure, a particle-scale model which can be used to calculate vertical and horizontal repulsion between clay particles has been proposed. This model has two initial states which represent the clays at low pressure and high pressure, and the particles in this model can undergo rotation and vertical translation. The computation shows that the majority of particles in a clay sample at high pressure state would experience rotation during one-dimensional compression. In addition, rotation of particles which tends to form a parallel structure causes an increase of the horizontal interparticle force, while vertical translation leads to a decrease in it. Finally, the link between interparticle force, microstructure, and macroscopic K0 is analyzed and it can be used to interpret well the nonlinear changes in K0 with both vertical consolidation stress and height-diameter ratio. |
| format | Article |
| id | doaj-art-378c036916b14217a50a28f88f0013f9 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-378c036916b14217a50a28f88f0013f92025-02-03T06:48:28ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422015-01-01201510.1155/2015/540621540621Micromechanism Underlying Nonlinear Stress-Dependent K0 of Clays at a Wide Range of PressuresXiang-yu Shang0Chen Yang1Guo-qing Zhou2Xiu-zhong Zheng3State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mechanics & Civil Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mechanics & Civil Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaIn order to investigate the mechanism underlying the reported nonlinear at-rest coefficient of earth pressure, K0 of clays at high pressure, a particle-scale model which can be used to calculate vertical and horizontal repulsion between clay particles has been proposed. This model has two initial states which represent the clays at low pressure and high pressure, and the particles in this model can undergo rotation and vertical translation. The computation shows that the majority of particles in a clay sample at high pressure state would experience rotation during one-dimensional compression. In addition, rotation of particles which tends to form a parallel structure causes an increase of the horizontal interparticle force, while vertical translation leads to a decrease in it. Finally, the link between interparticle force, microstructure, and macroscopic K0 is analyzed and it can be used to interpret well the nonlinear changes in K0 with both vertical consolidation stress and height-diameter ratio.http://dx.doi.org/10.1155/2015/540621 |
| spellingShingle | Xiang-yu Shang Chen Yang Guo-qing Zhou Xiu-zhong Zheng Micromechanism Underlying Nonlinear Stress-Dependent K0 of Clays at a Wide Range of Pressures Advances in Materials Science and Engineering |
| title | Micromechanism Underlying Nonlinear Stress-Dependent K0 of Clays at a Wide Range of Pressures |
| title_full | Micromechanism Underlying Nonlinear Stress-Dependent K0 of Clays at a Wide Range of Pressures |
| title_fullStr | Micromechanism Underlying Nonlinear Stress-Dependent K0 of Clays at a Wide Range of Pressures |
| title_full_unstemmed | Micromechanism Underlying Nonlinear Stress-Dependent K0 of Clays at a Wide Range of Pressures |
| title_short | Micromechanism Underlying Nonlinear Stress-Dependent K0 of Clays at a Wide Range of Pressures |
| title_sort | micromechanism underlying nonlinear stress dependent k0 of clays at a wide range of pressures |
| url | http://dx.doi.org/10.1155/2015/540621 |
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