Predicting the behavior of graphite/epoxy laminates under hydrothermal loads

Sébastien Didierjean (1) , Laurent Michel (2) , Jean-Jacques Barrau (3) , Eric Paroissien (1)

1 EADS, Corporate Research Center
2 DGM - Département de Génie Mécanique de l'ENSICA
3 ISAE-SUPAERO - Institut Supérieur de l'Aéronautique et de l'Espace

The purpose of this article is to determine the effect of moisture concentration on the mechanical behaviour of the elementary ply of a composite laminate. Fibres being considered as insensitive to hydrothermal ageing it was chosen to characterize the evolution of the epoxy matrix Young Modulus (Em) as a function of the moisture concentration (c). A series of tests were performed at several temperatures and moisture contents to determine the mechanical characteristics of an elementary ply (El, Et, nlt and Glt). Then through classical micromechanical models the evolution of Em is obtained by inverse indentification.

Mots clés: Moisture ageing; Composite laminate; Mechanical properties

Domaines: Autre

Sébastien Didierjean, Laurent Michel, Jean-Jacques Barrau, Eric Paroissien. Predicting the behavior of graphite/epoxy laminates under hydrothermal loads. EUROMECH 453 Internal Stresses in Polymer Composite Processing and Service Life, Dec 2003, Saint-Etienne, France. pp.1-4. ⟨hal-01892402⟩