Stress relaxation and elastic bounds of a viscoelastic microstructured material

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Stress relaxation and elastic bounds of a viscoelastic microstructured material

Popis výsledku v původním jazyce

We develop the constitutive model of a special material which microscopic structure is formed by regularly arranged elastic inclusions floating in a viscoelastic matrix. The model is tested by numerical simulations of unidirectional mechanical tests controlling the sample strain. The evolution of the stress shows that the viscoelastic behavior is bounded by two elastic laws corresponding to the mechanical behavior the medium would have if the matrix did not deform and the one the material would have ifthe matrix were not viscous. Moreover, the true stress/strain law is tangent to the first elastic law at small strain while it tends toward the latter one when the strain becomes larger. Transition from one tangent to the other can be so sharp that a local maximum of stress can appear resulting in an original kind of stress relaxation.

Název v anglickém jazyce

Stress relaxation and elastic bounds of a viscoelastic microstructured material

Popis výsledku anglicky

We develop the constitutive model of a special material which microscopic structure is formed by regularly arranged elastic inclusions floating in a viscoelastic matrix. The model is tested by numerical simulations of unidirectional mechanical tests controlling the sample strain. The evolution of the stress shows that the viscoelastic behavior is bounded by two elastic laws corresponding to the mechanical behavior the medium would have if the matrix did not deform and the one the material would have ifthe matrix were not viscous. Moreover, the true stress/strain law is tangent to the first elastic law at small strain while it tends toward the latter one when the strain becomes larger. Transition from one tangent to the other can be so sharp that a local maximum of stress can appear resulting in an original kind of stress relaxation.

Druh

D - Stať ve sborníku

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název statě ve sborníku

Recent advances in continuum mechanics

ISBN

978-960-474-056-7

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

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Název nakladatele

WSEAS

Místo vydání

Cambridge

Místo konání akce

Cambridge

Datum konání akce

26. 2. 2009

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

000266665100033