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On Dispersion and Band Gaps in Heterogeneous Media

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F07%3A00000292" target="_blank" >RIV/49777513:23520/07:00000292 - isvavai.cz</a>

  • Alternative codes found

    RIV/49777513:23520/07:00000048 RIV/49777513:23640/07:00000012 RIV/49777513:23640/07:00000038

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    On Dispersion and Band Gaps in Heterogeneous Media

  • Original language description

    Dispersion and existence of the band gaps belong to well known features of periodically arranged structures with finite scale of the heterogeneities. Assuming long waves propagation, these phenomena can be studied using the limit homogenized model of elastic, or piezo-elastic composites. For this a strong heterogeneity in the elastic coefficients is considered. To justify such artificial modelling assumption, we discuss a numerical convergence of the scale-dependent solution to the limit one. The influence of the microstructural topology and geometry on the homogenization result is discussed; in particular, two cases are considered: soft inclusions in stiff matrix and rigid inclusions in compliant matrix. The sensitivity analysis of the band gap distribution w.r.t. shape of the inclusions is presented, numerical examples are included.

  • Czech name

    Disperze a zakázaná pásma v heterogenních materiálech

  • Czech description

    Disperze a existence zakázaných pásem (band gaps) patří k charakteristickým vlastnostem periodických struktur s konečnou velikostí heterogenit. Předpokládáme-li šíření dlouhých vln, tyto vlastnosti lze studovat pomocí limitního homogenizovaného modelu piezo-elastických kompozitů se silnou heterogenitou v elastických koeficientech. Pro validaci modelu je nutné prokázat konvergenci škálově závisého řešení k výsledku získanému limitním modelem. Je diskutována otázka vlivu mikrostruktury a citlivostní analýza distribuce zakázaných pásem.

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    JI - Composite materials

  • OECD FORD branch

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2007

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    Modelling of Heterogeneous Materials with Applications in Construction and Biomedical Engineering

  • ISBN

    978-80-01-03762-1

  • ISSN

  • e-ISSN

  • Number of pages

    3

  • Pages from-to

    45-47

  • Publisher name

    Czech Technical University

  • Place of publication

    Prague

  • Event location

    Praha

  • Event date

    Jan 1, 2007

  • Type of event by nationality

    EUR - Evropská akce

  • UT code for WoS article