A 14-seater civil aircraft design with an innovative composite structure / Neelakante Gowda in JEC COMPOSITES MAGAZINE, N° 80 (04/2013)

[article]  inJEC COMPOSITES MAGAZINE > N° 80 (04/2013) . - p. 41-42 Titre : A 14-seater civil aircraft design with an innovative composite structure Type de document : texte imprimé Auteurs : Neelakante Gowda, Auteur ; Byji Varughese, Auteur ; Giridharan Arumugam, Auteur ; Ganesh Ramachandrachari, Auteur Année de publication : 2013 Article en page(s) : p. 41-42 Langues : Anglais (eng) Catégories : Avions -- Matériaux Composites à fibres de carbone Conception technique Coût -- Contrôle Epoxydes Matériaux -- Allègement Matériaux -- Imprégnation Index. décimale : 620.1 Mécanique de l'ingénieur (mécanique appliquée) et matériaux Résumé : CSIR-NAL, a leading aerospace laboratory in India, has established sophisticated national facilities for the research and development of flight vehicles. Its main programme focuses on the design, prototype development, flight testing and certification of small- and medium-sized civil aircrafts. In this direction, CSIR-NAL is developing a 14-seater civil aircraft, SARAS. Note de contenu : - Carbon/epoxy prepreg material- - Cost and weight - Design and manufacturing - Military and civil applications - Fuel and fatigue savings Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18981 [article]

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A350 XWB composite bonded repair / Sébastien Hanser in JEC COMPOSITES MAGAZINE, N° 128 (05-06/2019)  

[article]  inJEC COMPOSITES MAGAZINE > N° 128 (05-06/2019) . - p. 44-46 Titre : A350 XWB composite bonded repair : New technology for new aircraft Type de document : texte imprimé Auteurs : Sébastien Hanser, Auteur ; Guillaume Ferrer, Auteur ; Sébas Dupouy, Auteur Année de publication : 2019 Article en page(s) : p. 44-46 Langues : Anglais (eng) Catégories : Assemblages à boulons Avions -- Entretien et réparations Compactage Composites à fibres de carbone Ensachage Essais de résilience Films adhésifs Foudre, Protection contre la Matériaux -- Imprégnation Traîtements de surface Index. décimale : 668.4 Plastiques, vinyles Résumé : Even if composite repairs are not new at Airbus, the extensive use of Carbon Fibre Reinforced Plastic (CFRP) on the A350 XWB and especially on primary non-removable parts, is driving the development and the industrialisation of new composite-specific repair solutions. As published in Airbus FAST magazine 61 - March 2018. Note de contenu : - COMBINING LEGACY AND ADVANCED INNOVATIVE SOLUTIONS - ADAPTIVE THE REPAIR TYPE TO THE SITUATION : Quick but temporary bolted metallic doubler - Permanent bolted pre-cured CFRP repair (but not flush) - Permanent bonded flush repair - A BONDED REPAIR, FROM START TO FINISH : Damage assessment - Damage removal - Stepping design for bonded repair - Surface preparation - The water-break test - Thermal profile - Repairing with pre-impregnated materials and film adhesives - Compaction - Vacuum bagging (internal/external) - Cure cycle - Restoration of lightning strike protection - Internal bolted repair embodiment - Final post repair inspections before return to service - System and internal equipment re-installation - Fig. 1 : A complex repair, mixing bolted an dbonded techniques - Fig. 2 : Principle of vacuum bagging - Fig. 3 : Restoration of lightning strike protection En ligne : https://drive.google.com/file/d/1SNh8IlpTypqBCSwJpOjU0ZMXyZvFXMaJ/view?usp=drive [...] Format de la ressource électronique : pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32539 [article]

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Accelerated weathering performance of Scots pine preimpregnated with copper-based chemicals before varnish coating - Part 1 : coated with cellulosic and polyurethane varnishes / Ahmet Gunduz in COLORATION TECHNOLOGY, Vol. 136, N° 1 (02/2020)  

[article]  inCOLORATION TECHNOLOGY > Vol. 136, N° 1 (02/2020) . - p. 34-44 Titre : Accelerated weathering performance of Scots pine preimpregnated with copper-based chemicals before varnish coating - Part 1 : coated with cellulosic and polyurethane varnishes Type de document : texte imprimé Auteurs : Ahmet Gunduz, Auteur ; Ergun Baysal, Auteur ; Turkay Turkoglu, Auteur ; Caglar Altay, Auteur ; Mustafa kucuktuvek, Auteur ; Huseyin Peker, Auteur Année de publication : 2020 Article en page(s) : p. 34-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique) Cellulose La cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules. Cuivre Décoloration Essais accélérés (technologie) Matériaux -- Imprégnation Pin sylvestre Polyuréthanes Vernis Index. décimale : 667.7 Cires, laques, vernis Résumé : This study aimed to determine the effect of accelerated weathering on gloss, surface hardness and colour changes of Scots pine (Pinus sylvestris L.). Test samples were impregnated with Adolit KD-5, Wolmanit CX-8 and Celcure AC-500 covered with cellulosic and polyurethane varnishes. The results showed that the values of surface hardness and gloss increased after accelerated weathering. While the surface hardness of Scots pine was increased for impregnated and polyurethane-coated varnish, it decreased for impregnated and cellulosic varnish-coated Scots pine after 1000 hours of accelerated weathering exposure. Copper-based chemical impregnation and varnish coating developed the gloss of Scots pine specimens relative to the surface characteristics observed in single-coated Scots pine specimens. While the most appropriate chemical was Celcure AC-500 for surface hardness, it was Adolit KD-5 for the gloss of Scots pine after 1000 hours of accelerated weathering exposure. Wood specimens impregnated prior to the application of varnish were more effective in stabilising the colour of Scots pine than Scots pine only coated with varnish. Polyurethane varnish-treated Scots pine showed better colour stability for each partial and total accelerated weathering exposure period. The total colour changes were lowest for polyurethane varnish-coated Scots pine impregnated with Celcure AC-500 after 1000 hours of accelerated weathering exposure. Note de contenu : - EXPERIMENTAL : Preparation of wood specimens and chemicals - Impregnation procedure - Coating of the wood surfaces - Surface hardness test - Gloss test - Colour test - Accelerated weathering test - RESULTS AND DISCUSSION : Surface hardness changes - Gloss changes - Colour changes DOI : https://doi.org/10.1111/cote.12435 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12435 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33698 [article]

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Advanced composite racing yacht construction / Fernando Borges de Sena in JEC COMPOSITES MAGAZINE, N° 55 (02-03/2010)

[article]  inJEC COMPOSITES MAGAZINE > N° 55 (02-03/2010) . - p. 51-58 Titre : Advanced composite racing yacht construction Type de document : texte imprimé Auteurs : Fernando Borges de Sena, Auteur ; Sebastiano Rech Morassutti, Auteur Année de publication : 2010 Article en page(s) : p. 51-58 Langues : Anglais (eng) Catégories : Bateaux -- Conception et construction Composites à fibres de carbone Matériaux -- Imprégnation Matières plastiques -- Thermoformage Mousses plastiques Usinage Index. décimale : 668.4 Plastiques, vinyles Résumé : Trimarine is a project management company that was founded in 1995 to develop weight-optimised solutions for marine applications. The company specialises in the process engineering, construction systems design and fit-out of racing and high-performance cruising yachts using advances composites. Note de contenu : - BUILDING CONSTRAINTS OF MARINE ADVANCED. - MATERIAL AND PROCESS CHOICES : Prepreg carbon vs. dry fibre (infusion and wet-preg) - Carbon fibres - Weave and UD styles/weights - Styrene acrylonitrile (SAN) core materials - Honeycomb : Al, Nomex, Kevlar - Release agents - Vacuum ancillaries and disposables - Oven-cured processes - Assembly ans secondary bonding. - SKILL REQUIRED : Advanced composites require a skilled workforced. - YARD EQUIPMENT / TIME CONSTRAINTS / TIME/COST CONSTRAINTS. - PROCESSING ELEMENTS : Vacuum vs. autoclave - Debulking practices - Prepreg debulking - lx layer at a time vs. multiple layers - Scaffolding solutions. Access to work surfaces - Model and tooling construction - Curing oven requirements. - IMPORTANT PROCESS ISSUES : Core thermoforming - Cutting and curing PVC foam - Precut core panel kits - Honeycomb cores and moisture - Planning and workforce organisation - Assembling sequence ans assembling jigs / Construction procedures - Weight controls - NDT control - Other testing methods used during and post production. - RULES AND OTHER LIMITATIONS. - CRITICAL ISSUES : Non-autoclave cure of large sandwich structures - Foam core stability. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10326 [article]

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Advanced diaphragm forming process for high temperature thermoplastic composite applications / Christian Hopmann in SAMPE JOURNAL, Vol. 48, N° 2 (03-04/2012)

[article]  inSAMPE JOURNAL > Vol. 48, N° 2 (03-04/2012) . - p. 24-29 Titre : Advanced diaphragm forming process for high temperature thermoplastic composite applications Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; W. Michaeli, Auteur ; R. Schöldgen, Auteur Année de publication : 2012 Article en page(s) : p. 24-29 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites à fibres Composites thermoplastiques Hautes températures Matériaux -- Imprégnation Polysulfures de phénylène Renforts textiles Index. décimale : 668.4 Plastiques, vinyles Résumé : Continuous fiber reinforced plastics with a thermoplastic matrix are recyclable, weldable and suitable for many structural applications. Due to the short cycle times of about 1 minute, forming processes for thermoplastic composite parts are already capable of series productions. Two of the most important forming technique are matched die forming and diaphragm forming. The matched die forming provides short cycle times and high processing temperatures but requires complex and expensive molds. The diaphragm forming process enables the use of low cost tooling and machinery and provides a high degree of flexibility. On the other hand its processing temperature range is limited to 250°C due to the silicone diaphragms, which are used for cost-efficient series production. The paper presents a new processing technique that was developed at IKV Aachen and combines the advantages of both processes. These particularly are a big variety of processable matrices and low cost equipment with a high degree of flexibility. The developed machinery like the new handling system, the innovative IR-heating station and the modified forming technique are described in detail. The development focuses on a temporal reduction of the thermal load of the diaphragms by using them only for the forming process. As a result, the processing temperature range has been extended from 250°C to 320°C so that it is now possible to additionally process PA6, PA66 and PPS based prepregs. Note de contenu : - Project goals - EXPERIMENTATION : Material - Development of the new processing techniques - Process option 1 : Depositing the prepreg - RESULTS : Quality of the reproduction of the mold geometry - Mechanical properties of the molded parts - Material processable with the advanced processes Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13605 [article]

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Aéronautique et espace. Matériaux composites à base de préimprégnés de résine thermodurcissable / Bureau de Normalisation de l'Aéronautique et de l'Espace / Issy-les-Moulineaux : BNAE (1988)

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Aéronautique et espace. Préimprégnés de résine thermodurcissable. analyse thermique différentielle - méthode - Norme NF L 17-451 / Bureau de Normalisation de l'Aéronautique et de l'Espace / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1988)

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Aéronautique et espace. Tissu préimprégné de résine thermodurcissable / Bureau de Normalisation de l'Aéronautique et de l'Espace / Issy-les-Moulineaux : BNAE (1988)

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Aérospatiale. Préimprégnés. Détermination de la pégosité - Norme NF L 17-461 / Bureau de Normalisation de l'Aéronautique et de l'Espace / Issy-les-Moulineaux : BNAE (1993)

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Air convective drying and curing of polyurethane-based paints on sheet molding compound surfaces / S. Vessot in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 70, N° 882 (07/1998)

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Alternative methods for transferring mosquito repellent capsules containing bio-based citronella oil to upholstery fabrics: coating and printing / Merih Sariisik in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)  

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An energy efficient process for lightweight construction / Thomas Müller in KUNSTSTOFFE INTERNATIONAL, Vol. 102, N° 6 (06/2012)

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An innovative wind blade sparcap technology / Matthieu Landais in JEC COMPOSITES MAGAZINE, N° 78 (01-02/2013)

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Approach to optimizing a combined out-of-autoclave (OOA) prepreg/liquid composite molding (LCM) process for integrated structures / Claudio di Fratta in SAMPE JOURNAL, Vol. 48, N° 5 (09-10/2012)

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Benzoxazine resin systems for future interior applications / Axel Braun in JEC COMPOSITES MAGAZINE, N° 48 (05/2009)

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Caractérisation en traction de l´assemblage de composite caoutchouc à renfort textile / Daniel Roessner in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 21, N° 1 (01-02-03-04/2011)

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Carbon/phenolic nanocomposites for ablative applications / J. S. Tate in SAMPE JOURNAL, Vol. 47, N° 3 (05-06/2011)

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Cerapreg - a new concept for cost-effective reinforced ceramic composites / Christoph Hofer in JEC COMPOSITES MAGAZINE, N° 147 (09-10/2022)  

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CFRP and eco-friendly technologies introduced to a future concept car / Se Hoon Kim in JEC COMPOSITES MAGAZINE, N° 91 (08-09/2014)

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Characterization of cured-induced residual stresses / O. Klinkova in JEC COMPOSITES MAGAZINE, N° 67 (08-09/2011)

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