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| Two-scale model for analysis of nastic materials and structures |
| Received:November 27, 2009 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20102003 |
| KeyWord:nastic material two-sacle model coupled method |
| Author | Institution |
| 张洪武 |
大连理工大学 工业装备结构分析国家重点实验室 运载工程与力学学部 工程力学系,大连 |
| 吕军 |
大连理工大学 工业装备结构分析国家重点实验室 运载工程与力学学部 工程力学系,大连 |
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| Abstract: |
| Nastic material is a kind of high energy density active materials, which mimics the processes used in the plant kingdom to produce large deformations through the conversion of chemical energy. A structure which is composed of nastic materials is called nastic structure. The numerical simulation of a nastic structure is a difficult task due to that the nastic material is generally assembled by huge number of microcapsules. To overcome the difficulties, in the current research, a two-scale model is established for the numerical simulation of nastic structures composed periodically of the microcapsules inside. The effective mechanical parameters are predicted for the nastic structure in which a cell of fluid is located and the effective bending properties of a nastic plate are determined. Based on the results obtained by homogenization analysis, a coupled two-scale model (CTSM) is established for the mechanical analysis of nastic structures with combining the ion-transport model constructed in our previous work [1]. Numerical results are given and demonstrate the validity and efficiency of multi-scale method developed. |