Butt-joined, thermoplastic stiffened-skin concept development / A. Offringa in SAMPE JOURNAL, Vol. 48, N° 2 (03-04/2012)

[article]  inSAMPE JOURNAL > Vol. 48, N° 2 (03-04/2012) . - p. 7-15 Titre : Butt-joined, thermoplastic stiffened-skin concept development Type de document : texte imprimé Auteurs : A. Offringa, Auteur ; J. W. van Ingen, Auteur ; A. Buitenhuis, Auteur Année de publication : 2012 Article en page(s) : p. 7-15 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Avions -- Fuselage Avions -- Matériaux Composites à fibres de carbone Composites thermoplastiques Joint d'about Polyéthers cétone cétone Polymères hautes performances Thermodurcissables Index. décimale : 668.4 Plastiques, vinyles Résumé : A novel thermoplastic skin concept, with co-consolidated stringers, is being brought to technology readiness level (TRL) 6. This implies manufacturing and mechanical testing of full scale demonstrator products. The stringers are T-shaped and made of flat preforms that are butt jointed to each other and to the panel skin. An injection molded filler increases strength. The skin is fiber placed over the stringer preforms and the product is co-consolidated at melt temperature. Because of the butt-joints, manufacturing is relatively simple. The result is a tough thermoplastic product that can compete on weight and cost with state-of-the-art thermoset composite panels. Development and testing of the panel concept is being done in a step-by-step process. Consecutive building blocks are: coupons, three-stringer subcomponent panels and finally full scale skin panels. The main panel represents the mid-section of a business jet horizontal tail. The panel will be assembled into a 12 meter span torsion box and tested in the second half of 2011. Note de contenu : - INTRODUCTION : General - Current thermoplastic composite applications - Thermoplastic growth potential - LARGE THERMOPLASTIC STRUCTURES : Current state-of-the-art thermoset panels - First large thermoplastic structures and discovery of the thermoplastic butt-joint - Butt joint research up to a panel concept - The TAPAS Project and the Road to TRL6 - Design of the torsion box demonstrator - SKIN PANEL DEVELOPMENT : Stringer design and development - Skin design, development and manufacture - Cost modeling - FULL SCALE TESTING Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13604 [article]

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Multi-cell, thermoplastic composite sandwich panel concept / A. Offringa in SAMPE JOURNAL, Vol. 46, N° 4 (07-08/2010)

[article]  inSAMPE JOURNAL > Vol. 46, N° 4 (07-08/2010) . - p. 6-10 Titre : Multi-cell, thermoplastic composite sandwich panel concept Type de document : texte imprimé Auteurs : A. Offringa, Auteur Année de publication : 2010 Article en page(s) : p. 6-10 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites à fibres de carbone -- Moulage par injection Composites thermoplastiques -- Moulage par injection Construction sandwich Fibres continues Industries aérospatiales Index. décimale : 668.4 Plastiques, vinyles Résumé : Continuous fiber reinforced thermoplastic composite usage in aerospace is increasing because of the inherent toughness and processing possibilities of these materials. The design of high performance thermoplastic sandwich panels has proven difficult to date because of the high processing temperatures required for these materials. Based on butt joining of thermoplastics composites, a sandwich panel concept has been developed. It is a multi-cell structure, where two skins are connected by parallel webs. The sandwich panel is co-consolidated in a single autoclave step. The connection between skins and webs is achieved by an injection molded filler. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10038 [article]

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Thermoplastics in aerospace, new products through innovative technology / A. Offringa in SAMPE JOURNAL, Vol. 41, N° 7 (11-12/2005)

[article]  inSAMPE JOURNAL > Vol. 41, N° 7 (11-12/2005) . - p. 19-27 Titre : Thermoplastics in aerospace, new products through innovative technology Type de document : texte imprimé Auteurs : A. Offringa, Auteur Année de publication : 2006 Article en page(s) : p. 19-27 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : Thermoplastic composites have long since matured into series production. Cost reduction has been the driver in this aerospace technology development and its applications. Fabric reinforced and unidirectional materials are currently available, both in sheet form and as single ply material. Thermo-folding and press-forming of single parts were the processing technologies initially developed. Welding of assemblies and co-consolidation have recently been added. With the co-consolidation technique, parts are built up from preforms and fused together in a single manufacturing step. Applications such as stiffened panels, beams and leading edges have emerged. Current development focuses on expanding co-consolidation and welding applications, such as welded control surfaces. The full range of thermoplastic processing technologies opens the road to an ever growing number of applications. Note de contenu : - MATERIAL DEVELOPMENT : Evolution of thermoplastic matrices - Thermoplastic composite material forms - PROCESSING TECHNOLOGY AND PRODUCT APPLICATIONS : Low-cost processing - The beginning: thermo-folding and press-forming - The advent of welding - Co-consolidation - Current development - Technology overview - FUTURE PROSPECTS Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23554 [article]

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