Computer modeling of systematic processing defects on the thermal and elastic properties of open Kelvin-cell metamaterials

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43923184" target="_blank" >RIV/60461373:22310/21:43923184 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.jeurceramsoc.2021.07.031" target="_blank" >https://doi.org/10.1016/j.jeurceramsoc.2021.07.031</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2021.07.031" target="_blank" >10.1016/j.jeurceramsoc.2021.07.031</a>

Result language
angličtina
Original language name
Computer modeling of systematic processing defects on the thermal and elastic properties of open Kelvin-cell metamaterials
Original language description
Open-cell metamaterials prepared by additive manufacturing or replica techniques are typically prone to processing defects resulting from limited resolution, strut cross-section variations or internal strut porosity. These defects are expected to cause deviations from the ideal (CAD-based or template-based) target microstructures and thus from the envisaged properties. This paper investigates some of these effects in a quantitative manner. Based on computer-generated open Kelvin-cell (tetrakaidecahedral) alumina-based metamaterials, the effective thermal conductivity and elastic constants, mainly Young's modulus, are calculated in dependence of the voxel size, strut thinning and strut wall thickness. It is shown that the porosity dependence of smooth, straight and full struts agrees closely to the Gibson-Ashby prediction for open-cell foams, while limited resolution and strut thinning leads to property values that tend to be lower and hollow struts lead to higher property values. The Pabst-Gregorova cross-property relation gives an excellent prediction of the conductivity-modulus correlation in all cases.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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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
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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