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Partager le résultat de cette rechercheComposite payloag fairing structural architecture assessment and selection / Thomas M. Krivanek in SAMPE JOURNAL, Vol. 48, N° 4 (07-08/2012)
Titre : Composite payloag fairing structural architecture assessment and selection Type de document : texte imprimé Auteurs : Thomas M. Krivanek, Auteur ; Bryan C. Yount, Auteur Année de publication : 2012 Article en page(s) : p. 40-48 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites à fibres
Industries aérospatiales -- MatériauxTags : 'Matériaux composites' 'Structures 'Composites fibres' 'Poids lourds' 'Lancement levage' Charges Risques spatiale' 'Conception structure' Garde Index. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : This paper provides a summary of the structural architecture assessments conducted and a recommendation for an affordable high performance composite structural concept to use on the
next generation heavy-lift launch vehicle, the Space Launch System (SLS).
The Structural Concepts Element of the Advanced Composites Technology (ACT) project and its follow on the Lightweight Spacecraft Structures and Materials (LSSM) project was tasked with evaluating a number of composite construction technologies for specific Ares V components : the Payload Shroud, the Interstage, and the Core Stage Intertank. Team studies strived to address the structural challenges, risks and needs for each of these vehicle components. Leveraging off of this work, the subsequent Composites for Exploration (CoEx) effort is focused on providing a composite structural concept to support the Payload Fairing for SLS.
This paper documents the evaluation and down selection of composite construction technologies and evolution to the SLS Payload Fairing. Development of the evaluation criteria (also referred to as Figures of Merit or FOMs), their relative importance, and association to vehicle requirements are presented. A summary of the evaluation results, and a recommendation of the composite concept to baseline in the Composites for Exploration (CoEx) project is presented.
The recommendation for the SLS Fairing is a Honeycomb Sandwich architecture based primarily on affordability and performance with two promising alternatives, Hat stiffened and Fiber Reinforced Foam (FRF) identified for eventual program block upgrade.Note de contenu : - PAYLOAD FAIRING REQUIREMENTS AND CONFIGURATION
- EVALUATION CRITERIA AND PRIORITY : Basic mass - Damage tolerance during use - Sensitivity to fabrication defects - Joint mass - Non-recurring cost + 20 production units - Acoustic transmissibility - Repairability - Thermal tolerance - Flexibility in desing - Non-destructive evaluation and inspectability - Environmental sensitivity - Structural health monitoring - Trade process
- RISK AND UNCERTAINTY ISSUES
- RESULTS OF STUDY : Basic mass - Concept overall scoringEn ligne : http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20120009204_2012009492.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15610
in SAMPE JOURNAL > Vol. 48, N° 4 (07-08/2012) . - p. 40-48[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14011 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Low-cost, high-strength foamed-core material for the trucking industry Type de document : texte imprimé Auteurs : Andrew Rekret, Auteur Année de publication : 2007 Article en page(s) : p. 43-45 Langues : Anglais (eng) Tags : 'Matière plastique' 'Etude expérimentale' 'Transport routier' 'Poids lourd' Application 'Coût fabrication' 'Diminution coût' 'Plastique alvéolaire' 'Structure sandwich' 'Matériau renforcé fibre' Thermoplastique composite' Index. décimale : 668.4 Plastiques, vinyles Résumé : Mastercore System Ltd. has invented an efficient, cost-effective process for producing foamed composite profiles/panels that offer significant advantages over the competing materials currently used across a wide variety of commercial applications. Note de contenu : - Thermoplastic technology
- Thermoset process
- Injection die
- Pultrusion die
- Foam injection die
- Gel coat die
- Properties of the final material
- Costs savings
- Design
- StrengthEn ligne : http://www.jeccomposites.com/news/composites-news/low-cost-high-strength-foamed- [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14110
in JEC COMPOSITES MAGAZINE > N° 36 (10-11/2007) . - p. 43-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008291 - Périodique Bibliothèque principale Documentaires Disponible
Titre : A novel explanation of the Low Profile mechanism in UPE resins Type de document : texte imprimé Auteurs : M. Montagne, Auteur ; X. Bulliard, Auteur ; V. Michaud, Auteur ; Jan-Anders E. Manson, Auteur Année de publication : 2006 Article en page(s) : p. 74-77 Langues : Anglais (eng) Tags : 'Polyester insaturé' Thermodynamique 'Diagramme phase 'Additifs low profile' 'Séparation phase' 'Poids moléculaire' Température Microgels 'Transition vitreuse' 'Micro-miction' Index. décimale : 668.4 Plastiques, vinyles Résumé : The most common theory regarding the Low Profile mechanism is centered on radicals initiating the reaction and the formation of microgels. Note de contenu : - Low profile additives ant their morphology
- Thermodynamics, phase diagrams and cloud point
- Light intensity during cure
- Reaction-induced phase separation
- The effect of PVAc molecular weight on the morphology
- The effect of temperature on the morphology
- The effect of PVAc concentration on the morphology
- Changes in the Tg and microvoidingPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13947
in JEC COMPOSITES MAGAZINE > N° 27 (08-09/2006) . - p. 74-77[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 005546 - Périodique Bibliothèque principale Documentaires Disponible
Titre : Relationships of synthetic organic tanning agents Type de document : texte imprimé Auteurs : Graham Lampard, Auteur Année de publication : 2011 Article en page(s) : p. 11-12 Langues : Anglais (eng) Catégories : Tannage Tags : 'Tanins organiques synthétiques' 'Groupe méthoxy' Tannage 'Poids moléculaire' Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Seemingly a while ago - actually IULTCS 1995 - Jeremy Holmes, then of Stahl, wrote a paper about designer tanning agents and, as regular readers may know, I think it still is an excellent paper and one that should be reviewed. However, until that happens, there was a paper at the last IULTCS Congress by Jochen Ammen et al from BASF about designer organic tanning agents. Note de contenu : - Influence of the methoxy group
- The optimal spacer
- Impact of molecular weightEn ligne : https://drive.google.com/file/d/1-z2QaJjAqpzDv7yxjyBy0aDtxjGVjEng/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18931
in LEATHER INTERNATIONAL > Vol. 213, N° 4813 (08/2011) . - p. 11-12[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013218 - Périodique Bibliothèque principale Documentaires Disponible
