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Comportement des matériaux cellulaires sous sollicitations dynamiques. 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 sous sollicitation dynamique est abordée par une approche multi-échelles. Le comportement des mousses polymères étudiées dépend du matériau constitutif, et de sa structure poreuse. L’approche développée consiste à proposer des moyens expérimentaux qui permettent d’imposer des sollicitations dynamiques sur ces matériaux afin de mesurer leurs réponses macroscopiques (pour l’identification de modèles de comportement) et d’identifier aussi la réponse de la structure de ces mousses à des échelles plus fines. L’objectif est ensuite de proposer une modélisation numérique capable de reproduire les phénomènes observés à ces échelles et de remonter au comportement macroscopique. Des méthodes et des techniques expérimentales de caractérisation ont donc été développées aux différentes échelles pour identifier le comportement macroscopique du matériau cellulaire. Les résultats obtenus à l’échelle macroscopique constituent une base de données indispensable pour l’identification de lois de comportement implémentées dans les dernières versions des codes de calcul éléments-finis. Cet article présente les moyens expérimentaux développés et 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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