AN HOMOGENEIZATION PROCEDURE FOR CARDOBORAD AND STITCHED SANDWICHES USING RESPECTIVELY ANALYTICAL AND NUMERICAL SIMULATION

Z. Aboura 1 N. Talbi 2 R. Ayad 2 S. Allaoui 3 M.L. Benzeggagh 1
1 Roberval - Roberval
2 GMMS - Groupe de Mécanique Matériaux et Structures
3 F2ME
PRISME - Laboratoire Pluridisciplinaire de Recherche en Ingénierie des Systèmes, Mécanique et Energétique
Abstract : We present in this paper two analytical homogenizations of corrugated cardboard and stitched sandwiches with emphasis on experimental procedures and numerical modeling. The interest of the use of sandwich structures is not any more to show. Their performances go from pairs with their complexities. As example: the new generation of stitched sandwich structures. The structural analysis using this type of materials becomes very quickly expensive in term of meshing and computing time, taking into account the complexity of the components. The idea used through this study consists, in the first step, in working out a procedure of homogenization in order to obtain an equivalent homogeneous material. Then powerful elements are developed to reproduce the mechanical behaviors of these structures. Two types of sandwich structures were the subjects of this study. The first is a corrugated cardboard considered as thin (4 mm thickness) and the second is a stitched sandwich with PU core and whose skins are out of woven glass. The tot al thickness is 22 mm. The results of the two analytical methods are compared with the experimental results and finite elements. They are promising and show a rather good correlation.
Keywords : Finite element Homogenization cardboard Stitched Sandwich Finite element.
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Z. Aboura, N. Talbi, R. Ayad, S. Allaoui, M.L. Benzeggagh. AN HOMOGENEIZATION PROCEDURE FOR CARDOBORAD AND STITCHED SANDWICHES USING RESPECTIVELY ANALYTICAL AND NUMERICAL SIMULATION. 3rd European Conference on Computational Mechanics, Jun 2006, Lisbon, Portugal. pp.506. ⟨hal-00635287⟩

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