| Autor: |
Rohan E., Cimrman R. |
| Jazyk: |
angličtina |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
Applied and Computational Mechanics, Vol 3, Iss 1, Pp 5-16 (2009) |
| Druh dokumentu: |
article |
| ISSN: |
1802-680X |
| Popis: |
We consider a strongly heterogeneous material consisting of three phases: an elastic matrix, medium-size inclusions periodically embedded in the elastic matrix; these inclusions are constituted by small rigid inclusions coated by a very compliant material. The dependence on scale of elasticity coefficients of the deformable medium-size inclusions is treated in the context of linear elasticity by the homogenization procedure providing a limit model that inherently describes band gaps in acoustic wave propagation. The band gaps occur for certain intervals of long wavelengths for which a frequency-dependent "mass density" tensor is negative. We illustrate the theoretical results with numerical simulations. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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