Particle‐scale effects on global axial and torsional interface shear behavior
| Autor: | Alejandro Martínez, J. D. Frost |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
business.industry 0211 other engineering and technologies Computational Mechanics 020101 civil engineering 02 engineering and technology Structural engineering Geotechnical Engineering and Engineering Geology Discrete element method 0201 civil engineering Local Void Shear (geology) Mechanics of Materials Soil volume General Materials Science Scale effects Slippage business 021101 geological & geomatics engineering |
| Zdroj: | International Journal for Numerical and Analytical Methods in Geomechanics. 41:400-421 |
| ISSN: | 1096-9853 0363-9061 |
| DOI: | 10.1002/nag.2564 |
| Popis: | Summary An extensive literature on the shear behavior of continuum–particulate interfaces has been developed during the last four decades. However, relatively limited work regarding the behavior of interfaces under different loading conditions has been published. This paper presents a discrete element modeling study, along with comparisons from experimental data, of interface behavior under axial and torsional drained loading conditions. Detailed studies allow for links between micro-scale particle behavior and observed global response to be developed and for the latter to be evaluated in light of particle–particle and particle–continuum interactions. The results of this study indicate that axial and torsional interface shear induce inherently different loading conditions, as shown by the different failure envelopes, stress paths, and induced soil volume changes and deformations. Furthermore, the results presented in this paper indicate that particle-level mechanisms, such as particle rotations and contact slippage, play different roles in axial and torsional shear. Coordination number, polar histograms, particle displacements, particle rotations, and local void ratio measurements provide further insights into the fabric evolution, loading conditions, and failure mechanisms induced by these two shear modes. This study expands the current understanding of interface behavior and discusses potential improvements to geotechnical systems that leverage the characteristics of different imposed loading conditions. Copyright © 2016 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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