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Un modèle viscoélastique pour la réponse des mousses polymériques à la compression cyclique

Published online by Cambridge University Press:  05 August 2009

Gianpietro Del Piero  and
Giampiero Pampolini
Gianpietro Del Piero
Affiliation:
Dipartimento di Ingegneria, Università di Ferrara, Via Saragat 1, 44100 Ferrara, Italie
Giampiero Pampolini
Affiliation:
Dipartimento di Ingegneria, Università di Ferrara, Via Saragat 1, 44100 Ferrara, Italie Laboratoire de Mécanique et d'Acoustique, 31 chemin Joseph-Aiguier, 13402 Marseille, France
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Abstract

Sous compression cyclique, les mousses polymériques montrent une perte progressive de résistance lorsque le nombre de cycles augmente. Le recouvrement de résistance après une période de repos suggère que ce comportement puisse être décrit par un effet de mémoire à long terme. On propose un modèle viscoélastique fondé sur la coexistence d'une énergie élastique non convexe et d'une dissipation de type visqueux. Des essais expérimentaux montrent la bonne correspondance entre le modèle et le comportement observé.

Keywords

Polymeric foamsstrain localizationnonconvex energiesviscous dissipationlong-term memoryMousse polymériquelocalisation des déformationsénergie non convexedissipation visqueusemémoire à long terme
Type
Research Article
Information
Mechanics & Industry , Volume 10 , Issue 3-4: 19e Congrès français de mécanique (CFM 2009) , May 2009 , pp. 261 - 266
Copyright
© AFM, EDP Sciences, 2009

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