Numerical Simulations for Large Deformation of Geomaterials Using Molecular Dynamics
From the microperspective, this paper presents a model based on a new type of noncontinuous theoretical mechanical method, molecular dynamics (MD), to simulate the typical soil granular flow. The Hertzian friction formula and viscous damping force are introduced in the MD governing equations to mode...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/1368713 |
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| _version_ | 1850172345885392896 |
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| author | Ziyang Zhao Jun Zhang |
| author_facet | Ziyang Zhao Jun Zhang |
| author_sort | Ziyang Zhao |
| collection | DOAJ |
| description | From the microperspective, this paper presents a model based on a new type of noncontinuous theoretical mechanical method, molecular dynamics (MD), to simulate the typical soil granular flow. The Hertzian friction formula and viscous damping force are introduced in the MD governing equations to model the granular flow. To show the validity of the proposed approach, a benchmark problem of 2D viscous material flow is simulated. The calculated final flow runout distance of the viscous material agrees well with the result of constrained interpolated profile (CIP) method as reported in the literature. Numerical modeling of the propagation of the collapse of three-dimensional axisymmetric sand columns is performed by the application of MD models. Comparison of the MD computational runout distance and the obtained distance by experiment shows a high degree of similarity. This indicates that the proposed MD model can accurately represent the evolution of the granular flow. The model developed may thus find applications in various problems involving dense granular flow and large deformations, such as landslides and debris flow. It provides a means for predicting fluidization characteristics of soil large deformation flow disasters and for identification and design of appropriate protective measures. |
| format | Article |
| id | doaj-art-cfbb9c5940ac4fcead7ece91de9e97d1 |
| institution | OA Journals |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-cfbb9c5940ac4fcead7ece91de9e97d12025-08-20T02:20:06ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/13687131368713Numerical Simulations for Large Deformation of Geomaterials Using Molecular DynamicsZiyang Zhao0Jun Zhang1Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Chengdu 610031, ChinaKey Laboratory of Transportation Tunnel Engineering, Ministry of Education, Chengdu 610031, ChinaFrom the microperspective, this paper presents a model based on a new type of noncontinuous theoretical mechanical method, molecular dynamics (MD), to simulate the typical soil granular flow. The Hertzian friction formula and viscous damping force are introduced in the MD governing equations to model the granular flow. To show the validity of the proposed approach, a benchmark problem of 2D viscous material flow is simulated. The calculated final flow runout distance of the viscous material agrees well with the result of constrained interpolated profile (CIP) method as reported in the literature. Numerical modeling of the propagation of the collapse of three-dimensional axisymmetric sand columns is performed by the application of MD models. Comparison of the MD computational runout distance and the obtained distance by experiment shows a high degree of similarity. This indicates that the proposed MD model can accurately represent the evolution of the granular flow. The model developed may thus find applications in various problems involving dense granular flow and large deformations, such as landslides and debris flow. It provides a means for predicting fluidization characteristics of soil large deformation flow disasters and for identification and design of appropriate protective measures.http://dx.doi.org/10.1155/2018/1368713 |
| spellingShingle | Ziyang Zhao Jun Zhang Numerical Simulations for Large Deformation of Geomaterials Using Molecular Dynamics Advances in Materials Science and Engineering |
| title | Numerical Simulations for Large Deformation of Geomaterials Using Molecular Dynamics |
| title_full | Numerical Simulations for Large Deformation of Geomaterials Using Molecular Dynamics |
| title_fullStr | Numerical Simulations for Large Deformation of Geomaterials Using Molecular Dynamics |
| title_full_unstemmed | Numerical Simulations for Large Deformation of Geomaterials Using Molecular Dynamics |
| title_short | Numerical Simulations for Large Deformation of Geomaterials Using Molecular Dynamics |
| title_sort | numerical simulations for large deformation of geomaterials using molecular dynamics |
| url | http://dx.doi.org/10.1155/2018/1368713 |
| work_keys_str_mv | AT ziyangzhao numericalsimulationsforlargedeformationofgeomaterialsusingmoleculardynamics AT junzhang numericalsimulationsforlargedeformationofgeomaterialsusingmoleculardynamics |