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Titre : Saving CO2 twice over : Thermoplastic foam injection molding with post-consumer recyclate Type de document : texte imprimé Auteurs : Fabian Schneider, Auteur ; Norbert Heyer, Auteur ; Felix Weitmeier, Auteur ; Andreas Handschke, Auteur ; Thomas Seul, Auteur Année de publication : 2023 Article en page(s) : p. 42-45 Langues : Anglais (eng) Catégories : Durée de vie (Ingénierie)
Essais de résilience
Essais dynamiques
Flexion (mécanique)
Gaz à effet de serre -- Réduction
Impact (mécanique)
Matières plastiques -- Recyclage
Mousses plastiques -- Moulage par injection
Mousses plastiques -- Propriétés mécaniques
Produits et matériaux recyclés
Traction (mécanique)Index. décimale : 668.4 Plastiques, vinyles Résumé : Foam injection molding already saves material. But what about using post-consumer recyclate instead of virgin material to reduce the carbon footprint even further? KraussMaffei, together with the University of Schmalkalden, Germany, has investigated this question particularly with respect to what it means for the mechanical part properties. Note de contenu : - Are the negative influences cumulative ?
- Determination of tensile strength
- Determination of flexural strength and impact strength
- Investigation of the electrical properties
- Pir versus PCR – specific advantages and disadvantages
- The question remains : when is it worth changing over ?En ligne : https://drive.google.com/file/d/1vdQOeO2IewYDtGFVGaoNfDZmoRhOsCCb/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40333
in PLASTICS INSIGHTS > Vol. 113, N° 7 (2023) . - p. 42-45[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24187 - Périodique Bibliothèque principale Documentaires Disponible Split-hopkinson pressure bar test and numerical simulation of steel fiber-reinforced high-strength / Ji Li in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 29, N° 2 (04/2019)
[article]
Titre : Split-hopkinson pressure bar test and numerical simulation of steel fiber-reinforced high-strength Type de document : texte imprimé Auteurs : Ji Li, Auteur ; Shaoqing Shi, Auteur ; Qiulin He, Auteur ; Shou Chen, Auteur Année de publication : 2019 Article en page(s) : p. 109-117 Note générale : Bibliogr. Langues : Français (fre) Catégories : Béton renforcé de fibres
Contraintes (mécanique)
Essais de résilience
Essais dynamiques
Fibres d'acier
Impact (mécanique)
Simulation par ordinateurRésumé : The fabrication and optimization of the shelter layer are critical to the performance of the protective works. The novel shelter layer made of steel fiber-reinforced high-strength concrete (SFRHSC) is much more advantageous than that of ordinary concrete. This paper curies out a split-Hopkinson pressure bar (SHPB) test on the steel fiber and high-strength concrete, two main components of the SFRHSC, aiming to disclose the failure features and dynamic compressive strength of the SFRHSC under dynamic conditions. Specifically, the SFRHSC specimens with 0 %, 0.5 % and 1.0 % of steel fiber were subjected to impact compression test under the air pressures of 0.7, 0.9 and 1. OMPa, respectively. In addition, the impact compression process was also numerically simulated on the finite-element software LS-DYNA. The research results show that : the increase in strain rate pushed up the dynamic compressive strength of the SFRHSC, that is, the failure degree of the specimen was greatly enhanced by the strain rate; under the air pressure of 0.7MPa, the specimen with 1.0 % of steel fiber had the highest dynamic compressive strength (1 80.9MPa), 22.6 % higher than that of the specimen with no steel fiber; the numerical simulation reproduced the one-dimensional (ID) propagation of the stress wave in the bars, which proves the hypothesis of ID elastic stress wave, and restaged the impact compression process on the SFRHSC, outputting results similar to the test data. Note de contenu : - TEST OVERVIEW
- TEST PRINCIPLE
- ERROR ANALYSIS : Interface friction effect - Stress wave dispersion effect
- TEST PROCEDURE
- NUMERICAL SIMULATION
- ANALYSIS ON SHPB TEST RESULTS : Comparison of test phenomena - Energy absorption of the SFRHSC - Analysis on dynamic response data
- ANALYSIS ON NUMERICAL SIMULATION RESULTSDOI : https://doi.org/10.18280/rcma.290206 En ligne : https://www.iieta.org/download/file/fid/12198 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34800
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 29, N° 2 (04/2019) . - p. 109-117[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22405 - Périodique Bibliothèque principale Documentaires Disponible A virtual test lab for structural composite materials / Carlos Gonzà lez in JEC COMPOSITES MAGAZINE, N° 111 (03/2017)
[article]
Titre : A virtual test lab for structural composite materials Type de document : texte imprimé Auteurs : Carlos Gonzà lez, Auteur ; Clà udio Lopes, Auteur Année de publication : 2017 Article en page(s) : p. 110-112 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse multiéchelle
Composites à fibres -- Propriétés mécaniques
Contraintes (mécanique)
Epoxydes
Essais dynamiques -- Appareils et matériels
Fibres à orientation unidirectionnelle
Impact (mécanique)
Simulation par ordinateurIndex. décimale : 668.4 Plastiques, vinyles Résumé : Fibre-reinforced polymers (FRP) have been progressively applied as structural materials during the past 50 years and are now extensively used in applications where, in spite of their high cost, their unique combination of low density, high stiffness and strength as well as toughness is a competitive advantage. Remarkable examples can be found in sectors such as aerospace, with modem commercial and military aircraft employing over 50% of composite materials by weight ; automotive, with electric cars pressing on low vehicle weight associated with extended battery ranges ; and also in the energy and sports sectors. Note de contenu : - Complex design and certification
- Multiscale simulation
- Virtual test lab
- FIGURES : 1. Composite materials are used in a wide range of applications - 2. Local-to-global multiscale simulation strategy to conduct virtual mechanical tests of composite materials that explores the hierarchical structure of composite materials - 3. Failure envelope of a carbon-epoxy unidirectional ply predicted by the computational micromechanics module (VIPER) of the virtual test lab. The numerical results are correlated with the Puck failure-criteria - 4. Results of the computational mesomechanics module of the virtual test lab. a) Virtual open-hole compression (OHC) test coupons according to ASTM D6484/D64884 standard ; b) Virtual drop-weight impact tests according to ASTM D7136/D7136§ (two different impact energies)Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28259
in JEC COMPOSITES MAGAZINE > N° 111 (03/2017) . - p. 110-112[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18758 - Périodique Bibliothèque principale Documentaires Disponible