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Numerical simulation of tensile residual stresses in SWCNT-reinforced polymer composites / M. R. Soleimany in INTERNATIONAL POLYMER PROCESSING, Vol. 36, N° 1 (2021)
[article]
Titre : Numerical simulation of tensile residual stresses in SWCNT-reinforced polymer composites Type de document : texte imprimé Auteurs : M. R. Soleimany, Auteur ; Majid Jamal-Omidi, Auteur ; S. M. Nabavi, Auteur ; Majid Tavakolian, Auteur Année de publication : 2021 Article en page(s) : p. 13-25 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à fibres de carbone -- Propriétés mécaniques
Contraintes résiduelles
Polyéthylène
Polymères -- Propriétés mécaniques
Simulation par ordinateur
Traction (mécanique)Index. décimale : 668.4 Plastiques, vinyles Résumé : The residual stresses play a significant role in the mechanical properties and strengthening capability of nanocomposites. The present research aims to numerically investigate the residual stress relaxation in nanotube-reinforced polymers in response to mechanical tensile loading. The systems under study consist of the armchair and zigzag single-walled carbon nanotubes (SWCNT) embedded in a polymer matrix. The nanotubes and polymer matrix are assumed to be bonded by van der Waals interactions based on the Lennard-Jones (L-J) potential at the interface. The interactions between carbon atoms in the nanotube and nodes in the polymer matrix are modelled by equivalent springs. In order to evaluate the analysis of elastic-perfectly plastic using finite element (FE) modelling, first, relaxation of the plastic residual stresses on steel hemisphere in contact with a rigid flat surface was examined in a loading-unloading cycle and verified with available data. Afterwards, the residual stress relaxation in nanotubes with different space-frame structures was computed due to displacement-controlled loading. Finally, the stress state and the plastic residual stresses in the nanocomposite for different carbon nanotube content were analyzed and discussed during loading and unloading. Regarding the effect of tensile stress, it was revealed that nanotube structures have significant effects on the residual stresses created in the nanocomposite. Note de contenu : - Material properties of SWCNTs
- Validation of simulation pProcess
- Numerical simulation of residual stress in SWCNT
- Residual stress analysis in a SWCNT-reinforced polymer nanocomposite
- Table 1 : Tensile properties of CNTs (Wernik and Meguid, 2010)
- Table 2 : Material properties used in the Jackson et al. (2005) study
- Table 3 : Comparison of residual stress obtained from numerical estimation and available result
- Table 4 : Mechanical properties of polyethylene
- Table 5 : The maximum von-Mises stress and residual stress value for various armchair SWCNT structures
- Table 6 : The maximum von-Mises stress and residual stress value for various zigzag SWCNT structures
- Table 7 : The maximum von-Mises stress and residual stress value for SWCNT-reinforced polymer composites with various armchair structuresDOI : https://doi.org/10.1515/ipp-2020-3957 En ligne : https://drive.google.com/file/d/1TiikaZ9_I7HOYQfjEA7JEe169IA9I7Z8/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36342
in INTERNATIONAL POLYMER PROCESSING > Vol. 36, N° 1 (2021) . - p. 13-25[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23731 - Périodique Bibliothèque principale Documentaires Disponible PA and PETG for continuous fibre co-extrusion technology in JEC COMPOSITES MAGAZINE, N° 146 (06-07/2022)
[article]
Titre : PA and PETG for continuous fibre co-extrusion technology Type de document : texte imprimé Année de publication : 2022 Article en page(s) : p. 86-89 Langues : Anglais (eng) Catégories : Composites à fibres de carbone
Composites à fibres de carbone -- Propriétés mécaniques
Fibres continues
Impression tridimensionnelle
Matériaux -- Imprégnation
Polyamide 12
PolyamidesUn polyamide est un polymère contenant des fonctions amides -C(=O)-NH- résultant d'une réaction de polycondensation entre les fonctions acide carboxylique et amine.
Selon la composition de leur chaîne squelettique, les polyamides sont classés en aliphatiques, semi-aromatiques et aromatiques. Selon le type d'unités répétitives, les polyamides peuvent être des homopolymères ou des copolymères.
Polyéthylène téréphtalate glycolIndex. décimale : 668.4 Plastiques, vinyles Résumé : This article details the main printing parameters and specific aspects regarding the layout of reinforced composite material based on pre-impregnated continuous 1.5k carbon fibre, PA 12 (nylon 12), and PETG plastics using CFC technology. The data used for comparison is available in the Aura slicer database ; reference will also be made to the results of tests carried out at Anisoprint. Note de contenu : - Plastics used in CFC printing technology
- Main parameters of CFC 3D printing with PETG and CFC PA
- Table 1 : PA and PETG differences and features
- Table 2 : The properties of some of the plastics used in CFC technology
- Table 3 : Changes in mechanical properties of the sample based on PA 12 depending on the layer height
- Table 4 : The mechanical characteristics of composite materials produced on the basis of carbon fibre and CFC PA and PETGPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38591
in JEC COMPOSITES MAGAZINE > N° 146 (06-07/2022) . - p. 86-89[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23696 - Périodique Bibliothèque principale Documentaires Disponible PAEK composite prepreg / Stuart Green in JEC COMPOSITES MAGAZINE, N° 131 (11-12/2019)
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Titre : PAEK composite prepreg : fast and efficient part manufacturing Type de document : texte imprimé Auteurs : Stuart Green, Auteur ; Didier Padey, Auteur ; Gilles Larroque, Auteur ; Justin Merotte, Auteur ; Alexandre Hamlyn, Auteur ; Victorien Merle, Auteur ; Denis Cartier, Auteur Année de publication : 2019 Article en page(s) : p. 70-73 Langues : Anglais (eng) Catégories : Bandes composites
Composites à fibres de carbone -- Propriétés mécaniques
Fibres à orientation unidirectionnelle
Hors autoclave (technologie)
Matériaux -- Imprégnation
Placement automatisé de fibres
Polyaryl éther cétones
Polymères semi-cristallins
Procédés de fabrication
Stratifiés
Technique de la production
Temps de cycle (production) -- RéductionIndex. décimale : 668.4 Plastiques, vinyles Résumé : Coriolis composites and Victrex teamed up to use an automated fibre placement (AFP) process to unlock the potential of VICTREX AE TM 250 UDT. The results showed a significant increase in lay-up speed was possible while achieving industry-acceptable levels of porosity (<2%) for in-situ consolidation. Out-of-autoclave) OoA consolidation showed its potential to reduce the cycle time and energy consumption. Note de contenu : - Automated fibre placement (AFP)
- In-situ consolidation
- Crystallinity (in-situ processing)
- Out-of-autoclave post-processing
- Fig. 1 : VICTREX AE 250 unidirectional carbon fibre-reinforced tape
- Fig. 2 : View of the Coriolis C1 laser assisted AFP head Governing physical mechanisms during laser assisted AFP (adapted from kok, 2018)
- Fig. 3 : Comparison of oven consolidation cycle between VICTREX AE 250 and a conventional high-temperature polymer
- Fig. 4 : Polished optical microsection through an oven-consolidated laminate made from VICTREX AE 250 composite tape laid up on a Coriolis C-Solo machine at 60 m/min. The white circle illustrates the area of polymer flow at a ply-drop. These results are in accordance with CScans performed on entire panels and showing no delamination nor volumetric porosities whatsoever
- Table 1 : In-situ consolidation of VICTREX AE 250 unidirectional tape at constant speed (3 m/min)
- Table 2 : In-situ consolidation of VICTREX AE 250 unidirectional tape at increasing speeds (6-20 m/min)
- Table 3 : Post-consolidation of VICTREX AE 250 unidirectional tape laid-up at increasing speeds (48-60 m/min)
- Table 4 : Mechanical properties comparison between oven-consolidated VICTREX AE 250 composite laminates and press-consolidated laminates against which the data have been normalisedPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33883
in JEC COMPOSITES MAGAZINE > N° 131 (11-12/2019) . - p. 70-73[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21273 - Périodique Bibliothèque principale Documentaires Disponible Performance of athletic prosthetic feet made of various composite materials with pmma matrix : numerical and theoretical study / Hayder Kareem Talla in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 31, N° 4 (08/2021)
[article]
Titre : Performance of athletic prosthetic feet made of various composite materials with pmma matrix : numerical and theoretical study Type de document : texte imprimé Auteurs : Hayder Kareem Talla, Auteur ; Jawad Kadhim Oleiwi, Auteur ; Abdul Kareem F. Hassan, Auteur Année de publication : 2021 Article en page(s) : p. 257-264 Note générale : Bibliogr. Langues : Français (fre) Catégories : Composites à fibres de carbone -- Propriétés mécaniques
Composites à fibres de verre -- Propriétés mécaniques
Polyéthylène à ultra haut poids moléculaire
Polyméthacrylate de méthyleLe poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec.
Prothèses
Stratifiés -- Propriétés mécaniquesIndex. décimale : 668.4 Plastiques, vinyles Résumé : Prosthetic upgrades are specialized prosthetics that enable patients to participate in more demanding recreational activities, such as running. This study examines the use of prosthetic limbs, specifically the athletic prosthetic foot. The current research focused on the manufacturing and production properties of an samples athletic prosthetic Foot made from composite materials based on a polymethyl methacrylate resin (PMMA) reinforced with various fibers (UHMWPE, Perlon, Carbon fiber, and Glass fiber). The finite element method (ANSYS-19R) is used to build an athletic prosthetic model and apply boundary conditions to investigate the influence of deformation and stored energy on the performance of the sports prosthetic foot. Six laminates have been manufactured, and it has been discovered that adding a number of carbon fiber layers to UHMWPE has a better effect on deformation than adding a glass fiber 26% improvement. Furthermore, the findings show there is an improvement in performance when the number of classes was doubled, as the rate of improvement between the laminate to which carbon fibers were added was 31%, and between the laminate to which glass fibers were added by 32% under the same boundary conditions. Note de contenu : - Problem
- Description
- Experimental work : Material - Equipment
- Procedure
- Data reduction
- Numerical implementation : Mesh sizing
- Results and Discussion
- Table 1 : The mechanical properties of materials
- Table 2 : Types of laminations for laminated composite specimens in this study
- Table 3 : The mechanical properties of laminateDOI : https://doi.org/10.18280/rcma.310410 En ligne : https://www.iieta.org/download/file/fid/60236 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37676
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 31, N° 4 (08/2021) . - p. 257-264[article]Polyurethane prepreg - A new concept for CFRP processing / Guido Streukens in JEC COMPOSITES MAGAZINE, N° 87 (03/2014)
[article]
Titre : Polyurethane prepreg - A new concept for CFRP processing Type de document : texte imprimé Auteurs : Guido Streukens, Auteur ; Eike Langkabel, Auteur ; Martina Ortelt, Auteur Année de publication : 2014 Article en page(s) : p. 102-104 Langues : Anglais (eng) Catégories : Composites à fibres de carbone
Composites à fibres de carbone -- Propriétés mécaniques
Epoxydes
Etudes comparatives
Matériaux -- Imprégnation
Polyuréthanes
Procédés de fabricationIndex. décimale : 668.4 Plastiques, vinyles Résumé : A new polyurethane-based prepreg pairs the excellent mechanics of polyurethane matrices with easy handling of prepreg. Outstanding mechanical properties, efficient and highly automated processing together with fast curing cycles - all combined into a single system.
Evonik's new polyurethane prepreg advantages are twofold : On one hand, it has very good overall properties with very high ductibility combined with superior surface properties.
On the other hand, it offers a completely new way of processing semi-finished goods. Binders are no longer needed and infusion is not required ; resulting in a shorter overall cycle time. Moreover, this PU prepreg is storage stable (for about 10 weeks at room temperature).Note de contenu : - The PU-based solution
- Suitable for automation and exterior applicationsPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23000
in JEC COMPOSITES MAGAZINE > N° 87 (03/2014) . - p. 102-104[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16109 - Périodique Bibliothèque principale Documentaires Disponible Positioning of a self-reinforced polyethylene in the industrial composites market / Coline Roiron in MATERIAUX & TECHNIQUES, Vol. 110, N° 3 (2022)
PermalinkProperties and applications of nanosilica-modified tooling prepregs / J. M. Nelson in SAMPE JOURNAL, Vol. 49, N° 1 (01-02/2013)
PermalinkProperties & failure mechanisms of a 3D-reinforced joint / Carolina Nogueira in JEC COMPOSITES MAGAZINE, N° 69 (11-12/2011)
PermalinkPropriétés mécaniques en fatigue à grands nombres de cycles des composites carbone époxy / Laurent Gornet in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 25, N° 2 (04-05-06/2015)
PermalinkPultrusion and resin film infusion (RFI) of bi-angle thin-ply NCF / Valentin Neacsu in JEC COMPOSITES MAGAZINE, N° 68 (10/2011)
PermalinkReady for large-scale production / Wolfgang Stenbeck in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 8 (08/2016)
PermalinkRegenerated cellulose fibers - great potential for sustainable and tough fiber-reinforced composites / Nina Graupner in CHEMICAL FIBERS INTERNATIONAL, Vol. 72, N° 2 (05/2022)
PermalinkReplacing metal in the gearbox / Roger Kaufmann in KUNSTSTOFFE INTERNATIONAL, Vol. 110, N° 2 (02/2020)
PermalinkReplacing methylenedianiline with a new blend in advanced composites / Yong Tang in JEC COMPOSITES MAGAZINE, N° 132 (01-02/2020)
PermalinkSelecting optimal molding and material conditions of reinforced polymeric nanocomposites with MWCNT using a multi-criteria decision making model / T. Azdast in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 5 (11/2018)
PermalinkSnap-cure material toolbox for high-volume applications / Max von Bistram in JEC COMPOSITES MAGAZINE, N° 113 (06/2017)
PermalinkStability analysis of electric transmission line tower made with composite material carbon fiber epoxy - An innovative approach / Chiranjit Bhowmik in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 29, N° 1 (02/2019)
PermalinkTensile properties of sandwich-designed carbon fiber filled PLA prepared via multi-material additive layered manufacturing and post-annealing treatment / Zhaogui Wang in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 3 (2023)
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PermalinkTesting nano-scale reinforced resin-infused carbon fibre composites / Mark Eaton in JEC COMPOSITES MAGAZINE, N° 112 (04-05/2017)
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