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Statements

Subject Item
n2:RIV%2F68407700%3A21110%2F04%3A01108183%21RIV%2F2005%2FGA0%2F211105%2FN
rdf:type
skos:Concept n16:Vysledek
dcterms:description
In the present work the Hashin-Shtrikman variational principles are extended to account for the presence of various transformation fields defined as local eigenstrain or eigenstress distributions in the phases. The evolution of such eigen-fields is examined here within a framework of the nonlinear viscoelastic behavior of a polymeric matrix conveniently described by the Leonov model. A fully implicit integration scheme is implemented to enhance the stability and efficiency of the underlying numerical analysis. A special choice of reference medium with a deformation-dependent shear modulus is proposed in order to improve the redistribution of averaged local fields due to local stress inhomogeneities associated with nonlinear viscoelastic response of the matrix phase. The present modeling strategy is further promoted by a good agreement of the results, including estimated effective thermoelastic properties, with the predictions of a direct microstructural computation. In the present work the Hashin-Shtrikman variational principles are extended to account for the presence of various transformation fields defined as local eigenstrain or eigenstress distributions in the phases. The evolution of such eigen-fields is examined here within a framework of the nonlinear viscoelastic behavior of a polymeric matrix conveniently described by the Leonov model. A fully implicit integration scheme is implemented to enhance the stability and efficiency of the underlying numerical analysis. A special choice of reference medium with a deformation-dependent shear modulus is proposed in order to improve the redistribution of averaged local fields due to local stress inhomogeneities associated with nonlinear viscoelastic response of the matrix phase. The present modeling strategy is further promoted by a good agreement of the results, including estimated effective thermoelastic properties, with the predictions of a direct microstructural computation. Tato práce se zabývá analýzou kompozitních materiálů s náhodnou mikrostrukturou. Pro popis chování těchto materiálových systémů jsou využity Hashin-Shtrikmanovy variační principy, vhodně rozšířené pro modelování nelineární vazkopružné odezvy materiálu. V příspěvku je též diskutována vhodná volba referenčního média a způsob linerizace vzniklého inkrementálního problému. Výsledky jsou porovnány se simulací problému metodou konečných prvků.
dcterms:title
Nelineární viskoelastická analýza kompozitních materiálů s náhodnou mikrostrukturou Nonlinear Viscoelastic Analysis of Statistically Homogeneous Random Composites Nonlinear Viscoelastic Analysis of Statistically Homogeneous Random Composites
skos:prefLabel
Nelineární viskoelastická analýza kompozitních materiálů s náhodnou mikrostrukturou Nonlinear Viscoelastic Analysis of Statistically Homogeneous Random Composites Nonlinear Viscoelastic Analysis of Statistically Homogeneous Random Composites
skos:notation
RIV/68407700:21110/04:01108183!RIV/2005/GA0/211105/N
n3:strany
644 ; 672
n3:aktivita
n10:P
n3:aktivity
P(GA106/03/0180)
n3:cisloPeriodika
2
n3:dodaniDat
n13:2005
n3:domaciTvurceVysledku
n7:3638464 n7:4695046 n7:9774629
n3:druhVysledku
n11:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
576400
n3:idVysledku
RIV/68407700:21110/04:01108183
n3:jazykVysledku
n18:eng
n3:klicovaSlova
fiber-reinforced composite material; Leonov model; energy methods; microstructures; nonlinear viscoelastic processes; probability and statistics
n3:klicoveSlovo
n5:microstructures n5:energy%20methods n5:probability%20and%20statistics n5:nonlinear%20viscoelastic%20processes n5:fiber-reinforced%20composite%20material n5:Leonov%20model
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[A097C8581B8A]
n3:nazevZdroje
International Journal for Multiscale Computational Engineering
n3:obor
n14:JI
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
3
n3:projekt
n17:GA106%2F03%2F0180
n3:rokUplatneniVysledku
n13:2004
n3:svazekPeriodika
4
n3:tvurceVysledku
Zeman, Jan Valenta, Richard Šejnoha, Michal
s:issn
1543-1649
s:numberOfPages
29
n4:organizacniJednotka
21110