Objectif This research project aims at delaying the onset of interfibre/matrix cracking in multilayer CFRP composites by applying design/manufacturing means, which are in analogy to the concept of prestressed concrete. Two major routes are being studied: Controlled expansion of a composite structure by using an expandable mandrel. Expansion is either done after filament winding, but prior to completion of gelling/curing or on a finished standard wound structure at a temperature above the glass transition point with final release of the expansion loads after cooling down. Stress relief of standard wound structures by submission at elevated temperatures to stresses similar to those experienced in later operation followed by cooling down to ambient temperature prior to unloading. For certain CFRP structures, precompression of the matrix can be achieved using an expandable mandrel. This leads to an increase in the tolerance stress/strain range as the threshold for interfibre/matrix cracking and thus first ply failure moves toward higher strain values. Champ scientifique engineering and technologymaterials engineeringcompositescarbon fibers Programme(s) FP1-EURAM - Research programme (EEC) on materials (raw materials and advanced materials) - Advanced materials (EURAM) -, 1986-1989 Thème(s) Data not available Appel à propositions Data not available Régime de financement CSC - Cost-sharing contracts Coordinateur Urenco Ltd Contribution de l’UE Aucune donnée Adresse 18 Oxford Road SL7 2NL Marlow Royaume-Uni Voir sur la carte Coût total Aucune donnée Participants (2) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire MAN Technologie AG Allemagne Contribution de l’UE Aucune donnée Adresse Bauschinger Straße 20 80997 München Voir sur la carte Coût total Aucune donnée RISO NATIONAL LABORATORY Danemark Contribution de l’UE Aucune donnée Adresse Frederiksborgvej 399 Voir sur la carte Coût total Aucune donnée