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Comportement des matériaux cellulaires sous sollicitationsdynamiques. Partie 1 : approche macroscopique

Published online by Cambridge University Press:  15 June 2010

P. Viot
P. Viot*
Affiliation:
LAMEFIP, Arts et Métiers PARISTECH, Esplanade des Arts et Métiers, 33405 Talence Cedex, France
*
aAuteur pour correspondance :philippe.viot@lamef.bordeaux.ensam.fr
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Abstract

La méthodologie proposée pour l’étude du comportement de matériaux cellulaires soussollicitation dynamique est abordée par une approche multi-échelles. Le comportement desmousses polymères étudiées dépend du matériau constitutif, et de sa structure poreuse.L’approche développée consiste à proposer des moyens expérimentaux qui permettentd’imposer des sollicitations dynamiques sur ces matériaux afin de mesurer leurs réponsesmacroscopiques (pour l’identification de modèles de comportement) et d’identifier aussi laréponse de la structure de ces mousses à des échelles plus fines. L’objectif est ensuitede proposer une modélisation numérique capable de reproduire les phénomènes observés à ceséchelles et de remonter au comportement macroscopique. Des méthodes et des techniquesexpérimentales de caractérisation ont donc été développées aux différentes échelles pouridentifier le comportement macroscopique du matériau cellulaire. Les résultats obtenus àl’échelle macroscopique constituent une base de données indispensable pourl’identification de lois de comportement implémentées dans les dernières versions descodes de calcul éléments-finis. Cet article présente les moyens expérimentaux développéset les résultats des essais obtenus à l’échelle macroscopique.

Keywords

Matériaux cellulairesmoussesdynamiqueroue inertiellebarres d’Hopkinsoncompression hydrostatiqueCellular materialsfoamsdynamic loadingsfly wheelHopkinson barshydrostatic compression
Type
Research Article
Information
Mechanics & Industry , Volume 11 , Issue 1 , January 2010 , pp. 1 - 23
Copyright
© AFM, EDP Sciences 2010

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