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On the stress distribution at scratching of thin film structures / Fredrik Wredenberg in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 5 (09/2010)
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Titre : On the stress distribution at scratching of thin film structures Type de document : texte imprimé Auteurs : Fredrik Wredenberg, Auteur ; Per-Lennart Larsson, Auteur Année de publication : 2010 Article en page(s) : p. 623-635 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Rayures
Revêtements:PeintureTags : Revêtement Rayure 'Structures film/substrat' 'Distribution du stress' 'Analyse des éléments finis' Délamination Index. décimale : 667.9 Revêtements et enduits Résumé : Scratching of thin film/substrate structures is studied theoretically and numerically. In most cases, the material behavior of the film as well as the substrate is described by classical elastoplasticity accounting for large deformations; further, pressure-sensitive flow models are considered. The main efforts are devoted toward an understanding of the influence from the film/substrate boundary on the stress distribution at scratching but for comparative reasons, scratching of homogeneous materials are also studied and pertinent results presented. Among other things, the results are discussed in relation to delamination initiation and growth at scratching. The numerical investigation is performed using the finite element method, and the numerical strategy is discussed in some detail. The most important finding given by the present study is that high shear stresses are the main driving force for delamination initiation and growth along the film/substrate interface. It was also noted that the influence from pressure-sensitive flow on the stress fields related to delamination initiation is small, both quantitatively and qualitatively. DOI : 10.1007/s11998-010-9242-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9242-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9916
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 7, N° 5 (09/2010) . - p. 623-635[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012448 - Périodique Bibliothèque principale Documentaires Disponible Validation of marine structures – Testing approaches / Yves Perrot in JEC COMPOSITES MAGAZINE, N° 59 (08-09/2010)
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Titre : Validation of marine structures – Testing approaches Type de document : texte imprimé Auteurs : Yves Perrot, Auteur Année de publication : 2010 Article en page(s) : p. 35-37 Langues : Anglais (eng) Tags : 'Industrie marine' Thermodurcissables 'Fibre carbone' Epoxy 'Matériaux composites' 'Tests validation' 'Contrôle non destructif' 'Structures sandwich' Index. décimale : 668.4 Plastiques, vinyles Résumé : This paper presents some of the tests and controls used to validate high-performance marine structures. The materials used to manufacture these structures are mainly carbon/epoxy composites with monolithic or sandwich construction. Non-destructive tests based on dynamic structural analysis are discussed more particularly here. Note de contenu : - Mechanical testing
- Non-destructive tests based on modal analysisEn ligne : http://www.jeccomposites.com/news/composites-news/validation-marine-structures-t [...] Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13786
in JEC COMPOSITES MAGAZINE > N° 59 (08-09/2010) . - p. 35-37[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012405 - Périodique Bibliothèque principale Documentaires Disponible Lecaroz, une structure tridimensionnelle / Maurice Reyne in CAOUTCHOUCS & PLASTIQUES, N° 758 (04/1997)
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Titre : Lecaroz, une structure tridimensionnelle Type de document : texte imprimé Auteurs : Maurice Reyne, Auteur Année de publication : 1997 Article en page(s) : p. 52-55 Langues : Français (fre) Catégories : Composites
Structures tridimensionnellesTags : 'Structures tubulaires tridimensionnelles' alvéolaires' Polyhèdres Index. décimale : 668.4 Plastiques, vinyles Résumé : Les structures tridimensionnelles Lecaroz, du nom de l'inventeur, permettent de réaliser un ensemble alvéolaire à la fois léger et très résistant. L'ossature d'un système révolutionnaire. Note de contenu : - D'hier à nos jours
- Les structures Lecaroz reposent sur des tubes
- De multiples applications potentiellesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24077
in CAOUTCHOUCS & PLASTIQUES > N° 758 (04/1997) . - p. 52-55[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17093 - Périodique Bibliothèque principale Documentaires Disponible Composite payloag fairing structural architecture assessment and selection / Thomas M. Krivanek in SAMPE JOURNAL, Vol. 48, N° 4 (07-08/2012)
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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 Creating 3-D, one piece, wovencarbon preforms using conventional weaving and shedding / Christopher McHugh in SAMPE JOURNAL, Vol. 45, N° 6 (11-12/2009)
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Titre : Creating 3-D, one piece, wovencarbon preforms using conventional weaving and shedding Type de document : texte imprimé Auteurs : Christopher McHugh, Auteur Année de publication : 2010 Article en page(s) : p. 33-41 Note générale : Bibliogr. Langues : Américain (ame) Tags : Préformes 'Textiles à usages techniques' 3D' 'Structures tissés' 'Fibre de carbone' Index. décimale : 668.4 Plastiques, vinyles Résumé : The main objective of this technical article is to demonstrate how 3-D carbon fabrics can be commercially manufactured using current design and manufacturing methods. Many fabric forming methods exist to manufacture 3-D structures, each with their own advantages. Bespoke machines have been developed to lay fibers in 3 or more directions and are keen to be called true 3-D weaving machines. Other methods of creating 3-D composites also have been widely publicized including multi-axial fiber tow laying, braiding, knitting and non-woven, however the inherent processing methods also their limitations when processing carbon fiber. During the course of this article items for discussion will include the need for a range of products to be developed without the need for many specialist fabric forming methods. By using conventional machinery it is possible to move to the next level of composite manufacture by creating one piece woven structures. These structures can be transported easily then expanded to create many forms, eliminating the need for multiple layup of carbon fibers. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8099
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Code-barres Cote Support Localisation Section Disponibilité 011840 - Périodique Bibliothèque principale Documentaires Disponible A survey and analysis of the role of molecular chaperone proteins and imidazole-containing dipeptide-based compounds as molecular escorts into the skin during stress, injury, water structuring and other types of cutaneous pathophysiology / M. A. Babizhayev in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 33, N° 1 (02/2011)
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