Paper number 882
|NEW METHODOLOGY TO STUDY THE BEHAVIOUR OF DELAMINATED COMPOSITE STRUCTURES|
J.C. Walrick1, D. Coutellier2, P. Geoffroy1, D. Dormegnie1
1O.N.E.R.A.-I.M.F.L., 5 Boulevard Paul-Painlevé, 59045 Lille Cedex.
2L.A.M.I.H-G.M, UMR CNRS 8530, Université de Valenciennes et du Hainaut Cambrésis, BP311 59304 Valenciennes Cedex.
|Summary||Laminated composite structures are used in many fields, for example ground transportation. To predict their mechanical behaviour under loading, it is necessary to have a suitable understanding of all the damaging processes such as delamination propagation. This study intends to detect and follow the delamination growth in a single multi-layer element for a modelling structure in finite elements code. Secondly, we are interested by progressive restitution of delamination effects in laminated modelling structure. The approach is applied with [902/02]s plates in three-point bending. Detection of discontinuous delamination growth front in transverse strips shape is validated by experimental tests. A similar validation is made for delamination effects restitution by comparison with energetic strain levels reached by loaded structure.
||Keywords|| delamination, fracture mechanics, behaviour law, modelling, finite elements, Tsai-Hill criterion, energy density criterion, interface.
Theme : Mechanical and Physical Properties ; Fracture Mechanics and Failure
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