Paper number 1256
|INTERLAYERS IN LAMINATES :MODELLING AND INFLUENCE ON THE FREE-EDGE FFECTS|
M. Haboussi1,2 , H. Dumontet1, J. L. Billoet1
1Laboratoire de Modélisation et de Mécanique des Structures
CNRS UPRES A 8007 , ENSAM/UPMC/ENSC
151, Boulevard de l'Hôpital 75013 Paris
2Laboratoire d'Energétique et de Mécanique Théorique et Appliquée
CNRS UMR 7563, INPL/ENSEM/EEIGM
ENSEM - 2, av. de la Forêt de Haye
B.P. 160 - 54504 Vandoeuvre Cedex
|Summary||The problem of free edge effects is examined with a special emphasis on the interlayer modelling. Currently observed in such materials, the interlayer is constituted by a resin enrichment and a specific fiber distribution which confer to the interlayer a continuous/diffuse behavior. Realistic models have then been developed in order to describe the transition behavior due to the interlayer in laminated composite. Based on a spatial continuous function, the firstmodel permits the description of an evolutive transition behavior which relates continuously the adjacent layer behaviors. The second kind of models proposed uses interface laws which are defined on material surfaces (with no thickness).Developed on the basis of matched asymptotic analysis, these laws are equivalent to the transition evolutive behavior primarily obtained. Used in a numerical analysis, these different models permit to show the influence of the interlayer on free-edge effect analysis.
||Keywords|| interfacial region, transition behavior, matched asymptotic method, laminates, free-edge effects, stressconcentration, singularity.
Theme : Mechanical and Physical Properties ; Simulation
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