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| Three dimensional cosserat continuum model and finite element analysis for the size effect of micro-structure |
| Received:March 08, 2012 Revised:July 19, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201303014 |
| KeyWord:Cosserat continuum model three-dimensional FEM size effect ABAQUS |
| Author | Institution |
| 唐洪祥 |
大连理工大学海岸与近海工程国家重点实验室, 大连 ;大连理工大学土木工程学院, 大连 |
| 胡兆龙 |
大连理工大学海岸与近海工程国家重点实验室, 大连 ;大连理工大学土木工程学院, 大连 |
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| Abstract: |
| Micropolar stresses and strains of three-dimensional(3D) Cosserat continuum are analyzed first,then a basic 3D Cosserat continuum theory and 3D 20-node finite element formulations and corresponding user element subroutine based on the subroutine UEL offered by numerical analysis software ABAQUS are developed.The deflection of a micro-cantilever beam and rotational angle of the micro-rod are analyzed by Cosserat continuum FEM and classical continuum FEM and analytical solution respectively.Numerical results demonstrate the effectiveness of 3D Cosserat continuum FEM in modeling size effect of micro-structure:as the size of micro-structure is more closer to the internal length scale,the deflection of a micro-cantilever beam and rotational angle of the micro-rod based on Coseerat continuum FEM are much less than which based on classical continuum theory or FEM; contrarily,the deflection of a micro-cantilever beam and rotational angle of the micro-rod based on Coseerat continuum FEM are much closer to which based on classical continuum theory or FEM. |