Numerical prediction of the effective coefficient of thermal expansion of 3D braided C/SiC composite
This paper is focused on the microstructure modeling and evaluation of effective coefficient of thermal expansion (CTE) of 3D braided carbon fiber-reinforced silicon carbide composites (C/SiC). Regarding the multi-scale characteristics of the composite, the microstructure modeling is carried out seq...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2009-12-01
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| Series: | International Journal for Simulation and Multidisciplinary Design Optimization |
| Subjects: | |
| Online Access: | https://www.ijsmdo.org/articles/smdo/pdf/2009/04/smdo2009021.pdf |
| Summary: | This paper is focused on the microstructure modeling and
evaluation of effective coefficient of thermal expansion (CTE) of 3D
braided carbon fiber-reinforced silicon carbide composites (C/SiC).
Regarding the multi-scale characteristics of the composite, the
microstructure modeling is carried out sequentially from the fiber
scale to tow scale. Effective elastic properties are obtained based
on the sequential homogenization from the fiber scale to the tow
scale. A stain energy model is developed for the prediction of the
effective CTE of composite materials. This model is based on the
relationship established between the strain energy of the
microstructure and that of the homogenized equivalent model under
specific thermo-elastic boundary conditions. Expressions of
closed-form are derived for the effective CTE in terms of the strain
energy and effective elastic tensor. Numerical results obtained by
the proposed model show a good agreement with the results measured
experimentally. |
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| ISSN: | 1779-627X 1779-6288 |