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A study of non-autoclave prepreg manufacturing technology / Gary G. Bond in SAMPE JOURNAL, Vol. 45, N° 3 (05-06/2009)

[article]  inSAMPE JOURNAL > Vol. 45, N° 3 (05-06/2009) . - p. 6-19 Titre : A study of non-autoclave prepreg manufacturing technology Type de document : texte imprimé Auteurs : Gary G. Bond, Auteur ; J. M. Griffith, Auteur ; Gail L. Hahn, Auteur ; C. Bongiovanni, Auteur ; J. Boyd, Auteur Année de publication : 2009 Article en page(s) : p. 6-19 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : Use of non-autoclave manufacturing technology has been limited by processes which provide lower quality than autoclave cured approaches and materials which do not meet the properties or structural life demanded. Non-Autoclave Manufacturing Technology is a program jointly accomplished by a Boeing-led team and the US Gouvernment (DARPA) under the guidance of the Air Force to address the challenges to enable disruptive, persuasive use of vacuum-bag-only prepreg for reduced recurring cost and cycle time for primary structures. The program addresses the following: - Autoclave-like properties with an initial cure temperature of 93°C with vacuum only and free standing post cure at 177°C - Reduced cost/span time tooling family for use in 10-25 units - Processing and tooling to match production, besause the tooling concepts are also production-worthy One key to achieving these goals is a 121°C use, medium tough epoxy prepreg system, representing a third generation of prepreg processed under vacuum pressure only. This article summarizes progress during the first year of the program. Note de contenu : - TECHNICAL EVALUATION : Material evaluation - Processing - Manufacturing/Tooling - Part feature based manufacturing limits - DISCUSSION : Materials - Processing - Manufacturing/Tooling Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23272 [article]

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"TiGr" laminates: Development of New Thin adhesive systems and associated test methods / K. Y. Blohowiak in SAMPE JOURNAL, Vol. 45, N° 3 (05-06/2009)

[article]  inSAMPE JOURNAL > Vol. 45, N° 3 (05-06/2009) . - p. 30-36 Titre : "TiGr" laminates: Development of New Thin adhesive systems and associated test methods Type de document : texte imprimé Auteurs : K. Y. Blohowiak, Auteur ; R. A. Anderson, Auteur ; W. B. H. Grace, Auteur ; J. W. Grob, Auteur ; D. H. Fry, Auteur Année de publication : 2009 Article en page(s) : p. 30-36 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : Titanium-Graphite laminates belong to a class of materials called Fiber-Metal Laminates (FML) and consist of layers of titanium interleafed through the thickness of a Carbon Fiber Reinforced Plastic (CFRP) or graphite composite laminate. TiGr offers advantages over metallic structures in terms of weight, fatigue characteristics, damage tolerance, and design flexibility. TiGr also offers advantages over traditional composite materials through higher bearing capabilities, greater toughness, more efficient layups, and an expanded design space. Optimization of surface preparation methods and development of new thin film adhesive systems have resulted in an extremely robust and environmentally durable titanium to CFRP interface architecture which is tailored for prepreg system families, and sized to facilitate titanium ply integration into CFRP structures for minimal impact to production. New hybrid screening test methods have been developed based on metal bond and carbon fiber composite testing techniques which efficiently assess the metal to carbon fiber prepreg interfacial strength and durability. The development and testing of these adhesive systems will be discussed in this talk. Note de contenu : - EXPERIMENTAL : Specimen fabrication details - TEST METHODS : Modified wedge extension test - Modified clibing drum peel test - DCB and ENF tests - Lap shear test - PERFORMANCE DATA : Wedge test performance - Peel test performance - DCB/ENF test performance - Lap shear performance - THIN ADHESIVE FILM DESIGN CONSIDERATIONS : Performance characteristics - Manufacturing characteristics - Adhesive optimization trials Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23277 [article]

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