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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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&apos;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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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&apos;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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20504 - Ceramics

Projekt

<a href="/cs/project/GA18-17899S" target="_blank" >GA18-17899S: Částečně a plně slinutá keramika - příprava, mikrostruktura, vlastnosti, modelování a teorie slinování</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of the European Ceramic Society

ISSN

0955-2219

e-ISSN

—

Svazek periodika

41

Číslo periodika v rámci svazku

14

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

11

Strana od-do

7130-7140

Kód UT WoS článku

000691269500001

EID výsledku v databázi Scopus

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