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| Improvement of the tetrakaidecahedral model for closed-cell aluminum foams |
| Received:June 25, 2008 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20102016 |
| KeyWord:closed-cell aluminum foams cellular structure elastic properties finite element method |
| Author | Institution |
| 屠永清 |
北京航空航天大学 土木工程系,北京 |
| 刘林林 |
北京航空航天大学 土木工程系,北京 |
| 万剑芳 |
北京航空航天大学 土木工程系,北京 |
| 杨明 |
北京航空航天大学 土木工程系,北京 |
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| Abstract: |
| The tetrakaidecahedral model which can describe the cellular structure of closed-cell aluminum foams is improved based on more reasonable assumptions about the foaming process. With the improved model, the case of high relative density where more mass will distribute at frame and top points can be described, and the relationships between cellular parameters and elastic properties, such as elastic modulus and Poisson's ratio are studied by the finite element method with coupling boundary conditions. Meanwhile, the fitting formula of elastic modulus is established and the stress distribution of the model under elastic compression deformation is also discussed. Comparing with former models, the improved tetrakaidecahedral model has a better performance in simulating the elastic properties of closed-cell aluminum foams. |
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