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Improved foam core materials for advanced composites processing / Stefan Reuterlöv in SAMPE JOURNAL, Vol. 42, N° 1 (01-02/2006)

[article]  inSAMPE JOURNAL > Vol. 42, N° 1 (01-02/2006) . - p. 6-9 Titre : Improved foam core materials for advanced composites processing Type de document : texte imprimé Auteurs : Stefan Reuterlöv, Auteur Année de publication : 2006 Article en page(s) : p. 6-9 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : Closed moulding processes put new requirements on the core materials for sandwich structures. Two news foam core material grades have been developed to meet these requirements. The first will replace the existing standard grades but with improved strength, ductility and thermal properties while maintaining the excellent stiffness of today's product. This grade is oriented towards closed manufacturing processes with processing at lower temperatures like infusion, RTM and VARTM and post cure up to 90°C. The second grade will provide full compatibility with low and medium temperature pre-preg and RFI systems for processing up to 130°C. In addition, for the DIAB core infusion process with a grooved core material, the making up has been improved for weight sensitive applications by using optimized finer pattern in the core surface to minimize resin uptake while still providing an even distribution and wet-out of the fibers. Note de contenu : - Background - New foam materials - Standard grade - Diab core infusion method Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23234 [article]

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Manufacturing of advanced helicopter rotor blades using high-performance foam cores based on PMI / Hermann F. Seibert in SAMPE JOURNAL, Vol. 42, N° 1 (01-02/2006)

[article]  inSAMPE JOURNAL > Vol. 42, N° 1 (01-02/2006) . - p. 18-19 Titre : Manufacturing of advanced helicopter rotor blades using high-performance foam cores based on PMI Type de document : texte imprimé Auteurs : Hermann F. Seibert, Auteur Année de publication : 2006 Article en page(s) : p. 18-19 Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : The first generation of ROHACELL polymethacrylimide (PMI) foams was invented 37 years ago. Only three years later, PMI foam was successfully introduced in an aerospace programme and received its first aerospace specification, in this case for helicopter fuselage parts. Today the foam is specified in more than 180 specifications worldwide. As a result of constant development a broad range of different PMI sandwich foam cores is available, tailored to suit for a variety of applications in different market segments. Four different grades are available to be used for structural aircraft and space applications. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23235 [article]

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Durable thermoplastic sandwich panels for various composite applications / Ernst Schmachtenberg in SAMPE JOURNAL, Vol. 42, N° 1 (01-02/2006)

[article]  inSAMPE JOURNAL > Vol. 42, N° 1 (01-02/2006) . - p. 24-27 Titre : Durable thermoplastic sandwich panels for various composite applications Type de document : texte imprimé Auteurs : Ernst Schmachtenberg, Auteur Année de publication : 2006 Article en page(s) : p. 24-27 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : The European consortium of the EUREKA-research project, called "PANELFORM", works on the development of thermoplastic composite sandwich panels. Due to the fact, that the same polymer is used as core material and as matrix in the skin layer both can be durably welded together. Furthermore the whole sandwich can be easily thermoformed in 2D/3D-shapes, welded to complex structures and repaired. Finally shredded panels can be recycled in a LFT-process. Besides this the main focus of the project aims on the economic production of thermoplastic sandwich panels and their further processing. As a result of the research work demonstrators like portable homes, caravans and interlocking flooring are built up to show the wide range of possible applications. Note de contenu : - THE COMPOSITE SANDWICH PANELS - MECHANICAL PROPERTIES - FINISHING TO COMPLEX STRUCTURAL PARTS : Double-diaphragm-forming (DDF) of the panels - Joining techniques - FIRST REALISED APPLICATIONS : Cargo boxes - Commercial and offroad vehicles - CASE STUDY OBJECTS Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23236 [article]

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On the role of membrane to improve quality of VARTM processed composites / Solange C. Amouroux in SAMPE JOURNAL, Vol. 42, N° 1 (01-02/2006)

[article]  inSAMPE JOURNAL > Vol. 42, N° 1 (01-02/2006) . - p. 31-40 Titre : On the role of membrane to improve quality of VARTM processed composites Type de document : texte imprimé Auteurs : Solange C. Amouroux, Auteur Année de publication : 2006 Article en page(s) : p. 31-40 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 668.4 Plastiques, vinyles Résumé : Microporous membranes are investigated as a mean to improve the quality and repeatability of the VARTM (Vacuum Assisted Resin Transfert Molding) process for affordable high performance composites applications. The goal of this paper is to introduce the membrane concept and show how it can improve process repeatability. This paper will first focus on two important sources of variability routinely encountered in VARTM : thickness gradients and the presence of dry-spots. General information about the membrane is provided and the benefits and requirements when used in VARTM are described. Results from membrane characterization studies and exploratory infusion experiments show potential of membrane based processing to reduce variability. Note de contenu : - THICKNESS GRADIENT AND DRY SPOTS : Dry spots - GENERAL INFORMATION ON MEMBRANE - CHARACTERIZATION OF MEMBRANE : Optical microscope - Scanning electron microscopy (SEM) - Atomic force microscopy (AFM) - EXPLORATORY EXPERIMENTS : Experiments - Behavior of the resin during the infusion - Optical microscopy (OM) - Sources of incompatibility Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23237 [article]

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