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| The micro-directional model of Cosserat continuum description for granular materials |
| Received:May 20, 2010 Revised:December 15, 2010 |
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| DOI：10.7511/jslx201105006 |
| KeyWord:granular materials cosserat continuum discrete particle assembly micro-directional model discrete element method |
| Author | Institution |
| 刘其鹏 |
大连理工大学 工业装备结构分析国家重点实验室,大连 |
| 李锡夔 |
大连理工大学 工业装备结构分析国家重点实验室,大连 |
| 楚锡华 |
武汉大学 土木建筑工程学院,武汉 |
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| Abstract: |
| This paper develops the micro-directional model of Cosserat continuum, taking into account the particle rotation and contact couples on the micro level. The effects of micro structures on macro behavior are embodied with the contact distribution function. The specific formulae of macro elastic constants under homogeneous and isotropic assumption are derived. Micro-mechanically-based expressions of the intrinsic length scale are also suggested for two-dimensional case. The validity of the proposed model is verified through the comparisons of theoretical predictions from the developed model and numerical simulation by using discrete element method on overall behavior of a granular assembly with regular arrangement. |