Accueil
SAMPE JOURNAL / Society for the Advancement of Material and Process Engineering (1973-) . Vol. 48, N° 4Sandwich materials & structuresMention de date : 07-08/2012 Paru le : 04/07/2012 |
Dépouillements
Ajouter le résultat dans votre panierDevelopment of new lightweight hybrid sandwich cores using FDM technology / S. Storck in SAMPE JOURNAL, Vol. 48, N° 4 (07-08/2012)
[article]
Titre : Development of new lightweight hybrid sandwich cores using FDM technology Type de document : texte imprimé Auteurs : S. Storck, Auteur ; J. Esteeves, Auteur ; M. Zupan, Auteur Année de publication : 2012 Article en page(s) : p. 6-12 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites
Construction sandwich
Modélisation par dépôt en fusion
Prototypage rapide
Stratifiés
Terpolymère acrylonitrile butadiène styrèneIndex. décimale : 668.4 Plastiques, vinyles Résumé : The high strength and low weight requirements of advanced land, air and sea vehicles are obtained by taking advantage of sandwich panel structures. The low density cores used are limited to feasible topologies by current manufacturing techniques. Fused deposition modeling combined with electroforming removes the manufacturing limitations and creates topologies with comparable mechanical properties to conventional cores. Tetrahedral, pyramidal and strut reinforced tetrahedral (SRT) unit cell topologies will be optimized for specific strength. The response of fused deposition acrylonitrile butadiene styrene (ABS) plastic cores will be presented. In addition, scaling experiments such as 3D scaling and slenderness ratio scaling will be conducted on a unit cell analysis. Note de contenu : - Ideal slenderness ratio
- Core generation
- Mechanical testing
- Analysis
- Vertical height scaling
- Relative density (slenderness ratio)
- Core scaling testing
- Slenderness ratio testingPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15606
in SAMPE JOURNAL > Vol. 48, N° 4 (07-08/2012) . - p. 6-12[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 14011 - Périodique Bibliothèque principale Documentaires Disponible Out-of-autoclave sandwich structure : processing study in SAMPE JOURNAL, Vol. 48, N° 4 (07-08/2012)
[article]
Titre : Out-of-autoclave sandwich structure : processing study Type de document : texte imprimé Année de publication : 2012 Article en page(s) : p. 24-31 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Assemblages collés
Collage
Colles:Adhésifs
Composites
Construction sandwich
Hors autoclave (technologie)
Stratifiés
Stratifiés -- Propriétés mécaniques
Structure en nid d'abeillesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Composite sandwich structures offer several advantages such as reduced weight, high bending/torsion stiffness, superior thermal insulation and excellent acoustic damping over conventional structural materials. One failure mechanism in a composite sandwich structure is the debonding of the composite facesheets from the core structure. A well-formed adhesive fillet at the interface of the honeycomb core cell walls and the laminate is a significant factor preventing bond failure. Improved adhesion strength with a well-formed adhesive fillet at the interface of the honeycomb core walls and laminate is the aim of sandwich composite manufacturing, and is one area of investigation in this work. Out-of-autoclave (OOA) processing of composites offers several key benefits compared to autoclave processing such as lower manufacturing cost resulting from a lower capital cost and lower energy consumption. In the present work, the effects of moisturized adhesive film, core type, material system and variable levels of vacuum on adhesive fillet formation are evaluated. Aluminum honeycomb and vented aluminum honeycomb are used as core materials in this study. Two material systems of prepregs and adhesive films, Cycom 5320 prepreg with FM 309-1M adhesive, and MTM45-1 prepreg with MTA-241/PK13 adhesive are used to manufacture the panels and evaluate the performance. A quantitative investigation of the adhesive fillet geometry is carried out for all the panels. Manufactured panels are evaluated for peel strengh and flatwise tensil strength in accordance with ASTM standards. Various combinations of core material, moisture content, material system and vacuum level are evaluated for effects on adhesive strength and adhesive foaming. Note de contenu : - Materials
- Manufacturing
- Statistical analysis
- Performance evaluation : Flatwise tensile strength - Climbing drum peel strength - Photomicrography
- Results and discussion : Flatwise tensile test - Climging drum peel testEn ligne : http://www.nxtbook.com/nxtbooks/sampe/journal_20120708/index.php?startid=24 Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15607
in SAMPE JOURNAL > Vol. 48, N° 4 (07-08/2012) . - p. 24-31[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 14011 - 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)
[article]
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
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 14011 - Périodique Bibliothèque principale Documentaires Disponible
Exemplaires (1)
Code-barres | Cote | Support | Localisation | Section | Disponibilité |
---|---|---|---|---|---|
14011 | - | Périodique | Bibliothèque principale | Documentaires | Disponible |