Layerwise models for the study of hybrid multilayered structures

Rawad Baroud (1) , Jean-François Caron (1) , Robert Le Roy (1) , Boumedienne Nedjar (1)

1 navier umr 8205 - Laboratoire Navier

In this paper, we present The 3D FE calculation of this structure is extremely complex due to the hollow geometry of the object but also due to the structural and material anisotropy. In particular, the wood has a very weak transverse rolling shear modulus. The effects of these transverse shears are important and cannot be fully accounted by an equivalent homogeneous layer that can be found in composite codes. A model based on a layerwise approach that improves the shear behavior predictions, and examines local responses, especially at the interface between the layers, was developed in the Navier laboratory. Named LS1, it is a Layerwise Stress approach with first-order approximations. Its finite element code called MPFEAP allows estimating the intensity of 3D singularities using a 2D plane mesh, even for this complex 3D structure. The performance of this approach is compared with Abaqus, 2D composite shell element, and with a beam analytical model. We also compare to experimental results.

Mots clés: Multilayer; Layerwise model; Finite element; Interlaminar stresses

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

Rawad Baroud, Jean-François Caron, Robert Le Roy, Boumedienne Nedjar. Layerwise models for the study of hybrid multilayered structures. 17th European Conference on Composite Materials, Jun 2016, Munich, France. ⟨hal-01788463⟩