COMPARISON OF HOMOGENIZATION APPROACHES USED FOR IDENTIFICATION OF MATERIAL PARAMETERS OF UNIDIRECTIONAL COMPOSITE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F17%3A43933032" target="_blank" >RIV/49777513:23520/17:43933032 - isvavai.cz</a>

Výsledek na webu

<a href="http://mit.imt.si/Revija/izvodi/mit173/srbova.pdf" target="_blank" >http://mit.imt.si/Revija/izvodi/mit173/srbova.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17222/mit.2015.177" target="_blank" >10.17222/mit.2015.177</a>

Jazyk výsledku

angličtina

Název v původním jazyce

COMPARISON OF HOMOGENIZATION APPROACHES USED FOR IDENTIFICATION OF MATERIAL PARAMETERS OF UNIDIRECTIONAL COMPOSITE

Popis výsledku v původním jazyce

The paper is aimed at the identification of material parameters of constituents of unidirectional long fiber carbon/epoxy composite. Real fiber and matrix volume ratios of unidirectional fiber composites were identified from images obtained by scanning electron microscopy (SEM). Fiber and matrix areas were analyzed using Matlab and its Image processing toolbox. Determined volume ratios were used to propose geometry of a micromechanical representative volume element. An algorithm assuring irregular fiber distribution in the representative volume element cross section and periodicity in the cross section plane was used. One layer representative volume element with mesh was built in Abaqus/CAE. Experimentally obtained force-elongation dependencies for tensile tests of specimens with different fiber orientations were processed and effective moduli were determined. In the first approach material parameters of phases were identified using OptiSlang optimization software and finite element code Abaqus. Periodically constrained representative volume element was loaded according to experiments, where specimens with different fiber orientations were loaded by tensile force. In the second approach SfePy software and asymptotic homogenization is used for the numerical computation on the microscopic scale which results in homogenized material parameters that are afterwards used at the macroscopic level. The optimization function characterized sum of differences of effective moduli and difference of Poisson’s ratios of the whole composite.

Název v anglickém jazyce

COMPARISON OF HOMOGENIZATION APPROACHES USED FOR IDENTIFICATION OF MATERIAL PARAMETERS OF UNIDIRECTIONAL COMPOSITE

Popis výsledku anglicky

The paper is aimed at the identification of material parameters of constituents of unidirectional long fiber carbon/epoxy composite. Real fiber and matrix volume ratios of unidirectional fiber composites were identified from images obtained by scanning electron microscopy (SEM). Fiber and matrix areas were analyzed using Matlab and its Image processing toolbox. Determined volume ratios were used to propose geometry of a micromechanical representative volume element. An algorithm assuring irregular fiber distribution in the representative volume element cross section and periodicity in the cross section plane was used. One layer representative volume element with mesh was built in Abaqus/CAE. Experimentally obtained force-elongation dependencies for tensile tests of specimens with different fiber orientations were processed and effective moduli were determined. In the first approach material parameters of phases were identified using OptiSlang optimization software and finite element code Abaqus. Periodically constrained representative volume element was loaded according to experiments, where specimens with different fiber orientations were loaded by tensile force. In the second approach SfePy software and asymptotic homogenization is used for the numerical computation on the microscopic scale which results in homogenized material parameters that are afterwards used at the macroscopic level. The optimization function characterized sum of differences of effective moduli and difference of Poisson’s ratios of the whole composite.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/LO1506" target="_blank" >LO1506: Podpora udržitelnosti centra NTIS - Nové technologie pro informační společnost</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Materiali in Tehnologije

ISSN

1580-2949

e-ISSN

—

Svazek periodika

51

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

SI - Slovinská republika

Počet stran výsledku

6

Strana od-do

373-378

Kód UT WoS článku

000404817900003

EID výsledku v databázi Scopus

2-s2.0-85020751194