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Honeycomb fuselage panel certification by analysis / S. Leemans in SAMPE JOURNAL, Vol. 46, N° 4 (07-08/2010)
[article]
Titre : Honeycomb fuselage panel certification by analysis Type de document : texte imprimé Auteurs : S. Leemans, Auteur ; P. J. Rohl, Auteur ; D. Huang, Auteur ; Frank Abdi, Auteur ; J. Surdenas, Auteur ; K. Raju, Auteur Année de publication : 2010 Article en page(s) : p. 30-47 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Avions -- Fuselage
Avions -- Matériaux
Certification
Construction sandwich -- Rupture
Essais (technologie)
Qualité -- Contrôle
Structure en nid d'abeillesIndex. décimale : 624.18 Conception et construction avec des matériaux déterminés Résumé : The utilization of advanced composite material systems in general aviation and transport aircraft is rapidly growing. This is placing a growing demand on the certification process for composite components. parts and repairs to meet regulatory requirements and statutes. It is very desirable to establish and demonstrate the technical capability to perform "certification by analysis" to reduce test requirements, perform fatigue analysis, and predict residual strength and remaining life after damage is incurred. The objective for the present work was to demonstrate the ability to predict the failure behavior of composite structural airframe components by generating calibrated material allowables from existing ASTM coupon test data ; validating those allowables against tailored, design-specific coupon test data ; and comparing the analytical results obtained from a blind study of full-scale "fuselage" panels with test results for equivalent full-scale test sub-components. The effort focused on fuselage panel test specimens built for the "full-scale damage tolerance of composite sandwich structures" tests performed at the "full-scale aircraft structural test evaluation & research" (FASTER) fixture at the FAA's Atlantic City test facility. A systematic "building-block" approach was followed to ensure high quality results. Basic material data for the material systems used were obtained through NIAR. Verification was accomplished by comparing test and predicteed cross-ply laminate and design-specific sandwich coupon test results. After the initial steps in the "building block" process were completed, progressive failure analyses (PFA) were performed for an undamaged panel ; ant then for panels with a circular hole and circumferential slots. PFA evaluations for damage initiation, damage propagation, fracture initiation, fracture propagation and final failure of the undamaged and the various damaged curved panels were obtained. The PFA results from the independent analysis verify GENOA's capability to accurately predict panel failure strength and modes, as well as highlight the capability of GENOA to be used as a test methodology verification. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10039
in SAMPE JOURNAL > Vol. 46, N° 4 (07-08/2010) . - p. 30-47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 012327 - Périodique Bibliothèque principale Documentaires Disponible Honeycomb reaches a new level / Frédéric Brun in JEC COMPOSITES MAGAZINE, N° 106 (07/2016)
[article]
Titre : Honeycomb reaches a new level Type de document : texte imprimé Auteurs : Frédéric Brun, Auteur Année de publication : 2016 Article en page(s) : p. 50-52 Langues : Anglais (eng) Catégories : Composites -- Essais de résilience -- Simulation par ordinateur
Composites à fibres -- Propriétés mécaniques
Essais dynamiques
Structure en nid d'abeilles
Structures tridimensionnellesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Aluminium honeycomb is commonly used as a core material in high-tech sectors such as aeronautics. This intermediate material saw only a few enhancements over the last couple of decades. But engineering composite 3D could change things by improving its properties with less material, thus reducing costs. Note de contenu : - Cell configuration parameters
- Virtual optimization
- Specimen manufacturing
- Testing conditions and results
- Compression
- Shear properties
- TABLES : 1. Comparison between finite element analysis and experiments - 2. Experimental results - 3. Synthesis of comparative results
- FIGURES : 1. Modifying the weakest cell wall (single-foil thickness) by folding - 2. Characterization of the missing elements for analysis - 3. Virtual honeycomb model - 4. Simulated comparison of shear behaviour : 3/8-5052-003 hexagonal cell configuration vs. modified one - 5. Influence of expansion on density - 6. Compressive strength versus density by wall thicknessPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26868
in JEC COMPOSITES MAGAZINE > N° 106 (07/2016) . - p. 50-52[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18212 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Hot runner, carbon neutral : Reducing the CCF through titanium-free mold constructions Type de document : texte imprimé Auteurs : Clemens Doriat, Auteur Année de publication : 2023 Article en page(s) : p. 41-43 Langues : Anglais (eng) Catégories : Buse (tuyère)
Canaux chauffants
Economies d'énergie
Matériaux -- Suppression ou remplacement
Moules d'injection -- Conception et construction
Structure en nid d'abeilles
TitaneIndex. décimale : 668.4 Plastiques, vinyles Résumé : The hot runner manufacturer Witosa is banishing titanium from its nozzle tips, pressure pieces and centerings. With this and other measures, the company wants to reduce its carbon footprint. It is intended to benefit customers in two ways. Note de contenu : - Over 80 percent air
- Life in energy saving mode
- Green power for 3D printers
- Fig. 1 :
- Fig. 2 :
- Fig. 3 :En ligne : https://drive.google.com/file/d/1JIvOy9FLp0bA3pbsJHrzYW-MyavalvQc/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39335
in KUNSTSTOFFE INTERNATIONAL > Vol. 113, N° 2 (2023) . - p. 41-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23918 - Périodique Bibliothèque principale Documentaires Disponible Influence of modified graphene oxide on the antifouling performance of waterborne polyurethane coatings containing amphiphilic honeycomb surface / Xu Zhao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
[article]
Titre : Influence of modified graphene oxide on the antifouling performance of waterborne polyurethane coatings containing amphiphilic honeycomb surface Type de document : texte imprimé Auteurs : Xu Zhao, Auteur ; Yuhong Qi, Auteur ; Zhanping Zhang, Auteur Année de publication : 2023 Article en page(s) : p. 725-740 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Formulation (Génie chimique)
Oxyde de graphène
Polymères amphiphiles
Polymères en émulsion
Polyuréthanes
Revêtements antisalissures
Structure en nid d'abeilles
Surfaces (technologie)Index. décimale : 667.9 Revêtements et enduits Résumé : The coating with amphiphilic honeycomb surface containing modified graphene oxide was constructed by a three-step method for improved antifouling properties. Graphene oxide is modified with potassium hydroxide and γ-aminopropyltriethoxysilane, and then the product is dispersed in water and ethanol. Isophorone diisocyanate, polyethylene glycol, and γ-aminopropyltriethoxysilane are used to construct an amphiphilic prepolymer. The honeycomb surface is constructed during the evaporation of water and ethanol and the mixing of the modified graphene oxide and prepolymer. The amphiphilic honeycomb surface gives the coating fouling resistance and fouling release, while the modified graphene oxide gives the coating fouling degradation. The coating’s amphiphilicity, microstructure, and antifouling properties are characterized by the contact angle, confocal laser scanning microscope, scanning electron microscopy, benthic diatom, and bacterial adhesion. The results show that the coatings form an amphiphilic surface with a honeycomb microstructure and exhibit good antifouling properties. The water, diiodomethane, and 1-bromonaphthalene contact angle can be less than 20°. The size and depth of the honeycomb microstructure are about 600 nm and 100–200 nm. Compared with traditional polyurethane and waterborne silicone coatings, the resistance to benthic diatom and bacteria is increased by at least 28 and 400 times, respectively. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of amphiphilic honeycomb coatings containing KGO (KGWPU) - Characterization
- RESULTS AND DISCUSSION : Structural properties - Mechanical properties - Amphiphilic properties - Morphological properties - Antifouling properties - Mechanism of antifouling
- Table 1 : The basic formulation of KGWPU with varying KGO contentsDOI : https://doi.org/10.1007/s11998-022-00704-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00704-z.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39315
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 725-740[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24056 - Périodique Bibliothèque principale Documentaires Disponible Interactive composite bridge / Sandra Gelbrich in KUNSTSTOFFE INTERNATIONAL, Vol. 105, N° 12 (12/2015)
[article]
Titre : Interactive composite bridge : Lightweight bridge design demonstrated by the example of an interactive honeycomb bridge based on a GFRP sandwich structure Type de document : texte imprimé Auteurs : Sandra Gelbrich, Auteur ; Andreas Ehrlich, Auteur ; Enrico Rudolph, Auteur ; Meike Röhrkohl, Auteur ; Lothar Kroll, Auteur ; Matthias Pfalz, Auteur Année de publication : 2015 Article en page(s) : p. 53-57 Langues : Anglais (eng) Catégories : Composites à fibres de verre
Construction sandwich
Diodes électroluminescentes
Eléments finis, Méthode des
Matériaux -- Allègement
Ponts -- Conception et construction
Structure en nid d'abeillesIndex. décimale : 668.4 Plastiques, vinyles Résumé : To create lightweight load-bearing structures, fiber-reinforced plastics (FRP) offer an excellent solution. But for efficient and sustainable use of FRP, it is important to ensure that the special characteristics of the material are correctly taken into account in design and production. Using the example of a free-formed arch bridge with adaptive lighting in Chemnitz, Germany, the potential of FRP for modern architecture is shown. Note de contenu : - Lightweight bridge construction
- Load-Bearing translucent material
- Design of an asymmetric arch bridge
- Dimensioning and structural analysis
- Production of the GFRP honeycomb sandwich modules
- Integral stitched sensors control the lightingEn ligne : https://drive.google.com/file/d/1-3G1atWQSh0OA9KFoxMC9DY6iog0X_t0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25392
in KUNSTSTOFFE INTERNATIONAL > Vol. 105, N° 12 (12/2015) . - p. 53-57[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17674 - Périodique Bibliothèque principale Documentaires Disponible Modeling and analysis the impact of unsymmetrical bending on aluminum honeycomb sandwich beams with polyester resin/glass fibers using finite element method / Elhadj Ghelloudj in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 30, N° 3-4 (08/2020)
PermalinkNature as a role model in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 11, N° 1 (2018)
PermalinkNew thermoplastic honeycomb technology makes lighteighting cost-efficient / Tomasz Czanecki in JEC COMPOSITES MAGAZINE, N° 103 (03/2016)
PermalinkNovel design and comparison of structural and modal analyses of auxetic geometry versus honeycomb geometry / U. Kemiklioglu in INTERNATIONAL POLYMER PROCESSING, Vol. 36, N° 4 (2021)
PermalinkOut-of-autoclave sandwich structure : processing study in SAMPE JOURNAL, Vol. 48, N° 4 (07-08/2012)
PermalinkPitch-catch (low frequency) bondtesters / N. R. Smith in SAMPE JOURNAL, Vol. 47, N° 6 (11-12/2011)
PermalinkPrinting continuous carbon fibre in true 3D / Cody Brown in JEC COMPOSITES MAGAZINE, N° 135 (07-08/2020)
PermalinkPermalinkRepair against the clock / Stray, Gary in JEC COMPOSITES MAGAZINE, N° 115 (08-09/2017)
PermalinkUn revêtement superhydrophobe plus résistant / Vincent Glavieux in LA RECHERCHE, N° 480 (10/2013)
PermalinkSandwich core materials & technologies - Part II / Scott W. Beckwith in SAMPE JOURNAL, Vol. 45, N° 4 (07-08/2009)
PermalinkStudy of modal behaviour of sandwich structure with various core materials - An analytical approach / Krishanu Gupta in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 30, N° 1 (02/2020)
PermalinkSuivi par émission acoustique de structure sandwich composite/nid d’abeille lors de sollicitation en flexion 3 points / Julien Bernard in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 24, N° 4 (10-11-12/2014)
PermalinkThe sound of composite violins investigated / Tim Duerinck in JEC COMPOSITES MAGAZINE, Special issue (11/2020)
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