A layerwise finite element for multilayers with imperfect interfaces

van Anh Duong (1) , Alberto Diaz Diaz (2) , Sylvain Chataigner (3) , Jean-François Caron (1)

1 navier umr 8205 - Laboratoire Navier
2 CIMAV - Centro de Investigación en Materiales Avanzados
3 IFSTTAR/SOA - Département Structures et Ouvrages d'Art

This article is aimed at proposing a new development of a layer-wise 2D finite-element method for multilayers considering the laminated plate as a superposition of Reissner plates coupled by interfacial stresses. Here, despite the 2D description of the laminates, the interfaces show a particular behavior, elastic or elastoplastic (Von-Mises criterion). The finite element formulation is derived and an eight-node multiparticle element is detailed. The application example of a double lap joint with an elastoplastic adhesive is then considered. The adhesive layer is modeled as an interface. The loading scheme is a load-unload-load one. Interface shear and normal stresses are compared to 3D finite element results. A good agreement between both techniques is observed, particularly for the prediction of the history of the slip between the two adherends and the plastic strains in the adhesive.

Mots clés: MATERIAU COMPOSITE; INTERFACE; PLASTICITE; METHODE DES ELEMENTS FINIS; COLLAGE

Domaines: Mécanique des matériaux [physics.class-ph]

van Anh Duong, Alberto Diaz Diaz, Sylvain Chataigner, Jean-François Caron. A layerwise finite element for multilayers with imperfect interfaces. Composite Structures, 2011, 93 (12), pp.3262-3271. ⟨10.1016/j.compstruct.2011.05.001⟩. ⟨hal-00639548⟩