Thermal conductivity and Young's modulus of cubic-cell metamaterials

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43919519" target="_blank" >RIV/60461373:22310/19:43919519 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/journal/ceramics-international/vol/45/issue/1?page=2" target="_blank" >https://www.sciencedirect.com/journal/ceramics-international/vol/45/issue/1?page=2</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ceramint.2018.09.271" target="_blank" >10.1016/j.ceramint.2018.09.271</a>

Result language
angličtina
Original language name
Thermal conductivity and Young's modulus of cubic-cell metamaterials
Original language description
It is shown that the popular quasi-laminate solutions for the relative (thermal) conductivity of cellular materials with cubic cells (closed or open) are in conflict with the upper Hashin-Shtrikman bound and thus inadmissible. However, numerical modeling can be used to estimate the porosity dependence of conductivity and leads to results that are below the upper Hashin-Shtrikman bound, as required for cubic and isotropic materials. The numerical results predict differences of up to 0.073 relative property units (RPU) between closed- and open-cell materials. For porosities approaching 100%, i.e. infinitely thin walls, both the analytical and the numerical solution for closed cubic cells approach the upper Hashin-Shtrikman bound. Moreover, the porosity dependence of the relative conductivity for closed cubic cells is very close to the upper Hashin-Shtrikman bound in the whole range of porosities and is correlated to the relative Young modulus via a cross-property relation based on the Hashin-Shtrikman bounds.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20504 - Ceramics

Project
<a href="/en/project/GA18-17899S" target="_blank" >GA18-17899S: Partially and fully sintered ceramics – processing, microstructure, properties, modeling and sintering theory</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)