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Tactile friction and perception of UV-curable coatings and their relation to physical surface parameters and contact mechanic simulation / Thomas Ules in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
[article]
Titre : Tactile friction and perception of UV-curable coatings and their relation to physical surface parameters and contact mechanic simulation Type de document : texte imprimé Auteurs : Thomas Ules, Auteur ; Michael GrieBer, Auteur ; Andreas Hausberger, Auteur ; Christian Schipfer, Auteur ; Mohammad Mansouri, Auteur ; Peter Fuchs, Auteur ; Sandra Schlögl, Auteur ; Dieter P. Gruber, Auteur Année de publication : 2023 Article en page(s) : p. 1803-1814 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Chimie des surfaces
Dureté (matériaux)
Eléments finis, Méthode des
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Simulation, Méthode de
ToucherIndex. décimale : 667.9 Revêtements et enduits Résumé : In this paper, the results of new investigations on the relationship between physical surface parameters of polymer-based coatings, skin hydration levels and tactile friction are presented. For this purpose, the chemical composition of the investigated coatings was varied on the basis of the curing and binding agent and also with respect to the addition of selected fillers. This allowed the adjustment of various surface parameters such as hardness, surface wettability and roughness over a wide range. Tribological tests were carried out in which the coefficient of friction between the finger pad and the respective coating was measured for different skin hydration levels. A specially developed setup was used that minimized changing skin hydration levels during the experiments that would impede reproducible friction measurements. While for dry skin the perceived friction correlates well to the coefficient of friction and surface hardness, this is not the case for moist finger skin. The results are explained under the assumption of adhesion dominated friction and the application of the Hertz contact theory. This finding was further investigated through contact mechanic simulations using the finite element method (FEM). To this end, the contact area formation dependence on the reaction force was studied for surfaces of different hardness and skin with different mechanical properties reflecting various hydration levels. The results qualitatively confirmed the experimental findings and the analysis based on the Hertz contact theory. Note de contenu : - EXPERIMENTAL : Materials - Methods - FEM contact model
- RESULTS & DISCUSSION : Physical characterization - Tactile friction - Perception studies - Contact simulation
- Table 1 : Chemical composition of the UV-curable coatings (all formulations contained 2 wt% Irgacure TPO-L)
- Table 2 : Physical surface parameters of the investigated sample coatings
- Table 3 : Elastic moduli (in kPa) of the hyperelastic material model (neo-Hookean solid) for the single skin layers Stratum Corneum (SC), Epidermis (ED) and Dermis (D)DOI : https://doi.org/10.1007/s11998-023-00792-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00792-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40162
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 1803-1814[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24337 - Périodique Bibliothèque principale Documentaires Disponible The sound of short glass fibers in plastics / Pascal Brandt in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 5 (05/2016)
[article]
Titre : The sound of short glass fibers in plastics : A new integrative simulation concept predicts the directional structure-borne sound behavior of short glass fiber-reinforced components Type de document : texte imprimé Auteurs : Pascal Brandt, Auteur ; Christian Hopmann, Auteur Année de publication : 2016 Article en page(s) : p. 35-38 Langues : Anglais (eng) Catégories : Acoustique L'acoustique est la science du son, ce qui inclut sa production, son contrôle, sa transmission, sa réception et ses effets. Elle fait notamment appel à des notions de mécanique des fluides, de mécanique vibratoire et de thermodynamique.
L'acoustique comprend de nombreuses ramifications parmi lesquelles on rencontre l'électroacoustique (microphones, haut-parleurs), l'audition, l’acoustique musicale, etc.
L'acoustique a des applications dans les domaines des sciences de la terre et de l'atmosphère, des sciences de l'ingénieur, des sciences de la vie et de la santé, ainsi que dans les sciences humaines et sociales.
Composites à fibres courtes
Composites à fibres de verre
Contrôle non destructif
Simulation, Méthode deIndex. décimale : 668.4 Plastiques, vinyles Résumé : The knowledge of the precise oscillation behavior of plastics components plays a key role both for acoustic considerations as well as for fatigue predictions. In order to calculate the acoustic performance of short glass fiber-reinforced components depending on the local fiber orientations, a comprehensive simulation chain has been developed at the Institute of Plastics Processing (IKV) in Aachen, Germany. Based on the principle of the integrative simulation it enhances conventional acoustic simulations. Note de contenu : - Analysis of the frequency-dependent anisotropic composite behavior
- Concept of the integrative acoustic simulation
- Efficient modeling of the composite using the matrix behavior
- Exact calculation of the oscillation behaviorEn ligne : https://drive.google.com/file/d/1gO8jcsD45PaecaMqN98_o3Q40tZNj9Tv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26329
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Code-barres Cote Support Localisation Section Disponibilité 18076 - Périodique Bibliothèque principale Documentaires Disponible The sunscreen simulator : A formulator's tool to predict SPF and UVA parameters / Bernd Herzog in SOFW JOURNAL, Vol. 129, N° 7 (07/2003)
[article]
Titre : The sunscreen simulator : A formulator's tool to predict SPF and UVA parameters Type de document : texte imprimé Auteurs : Bernd Herzog, Auteur ; Christine Mendrok, Auteur ; Sébastien Mongiat, Auteur ; Stefan Müller, Auteur ; Uli Osterwalder, Auteur Année de publication : 2003 Article en page(s) : p. 25-36 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Facteur de protection solaire
Peau -- Soins et hygiène
Produits antisolaires
Rayonnement ultraviolet A
Simulation, Méthode deIndex. décimale : 668.5 Parfums et cosmétiques Résumé : The Sunscreen Simulator is a piece of software enabling the calculation of SPF (sun protection factor), UVA/UVB-ratio, critical wavelength and the forecast whether the criterion of the Australian standard is given. It is based on a step film model, by which inhomogeneities of the absorbing layer are introduced. The two parameters describing the structure of the step film were adjusted by comparing the in vivo SPF data of three sunscreen standards with the results of corresponding calculations. Using the calibrated model, for a large number of suncreen formulations a satisfactory correlation of calculated and in vivo SPF data has been observed. The correlation of calculated and in vivo on rough quartz plates in excellent, and the forecast whether the Australian standard criterion is given or not appears to be reliable as well. The model reproduces synergistic effects on SPF induced by the presence of mixtures of UVA- and UVB-absorbing filters. It can also be used to design sunscreen formulations with a specific UVA performance. Note de contenu : - The step film model
- Calibration of the model parameters
- Materials and methods
- Correlation of calculated SPF and SPF in vivo
- Correlation of calculated UVA parameters and UVA parameters measured in vitro
- Application examples
- The sunscreen similator on the internetPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28141
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Code-barres Cote Support Localisation Section Disponibilité 18182 - Périodique Bibliothèque principale Documentaires Disponible Throughput up, costs down / Hans-Ulrich Siegenthaler in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 10 (10/2013)
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Titre : Throughput up, costs down Type de document : texte imprimé Auteurs : Hans-Ulrich Siegenthaler, Auteur ; Stefan Nägele, Auteur ; Wolfgang Walter, Auteur Année de publication : 2013 Article en page(s) : p. 142-144 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chlorure de polyvinyle
Compoundage
Matières plastiques -- Appareils et matériel
Matières plastiques dans les automobiles
Recherche industrielle
Simulation par ordinateur
Simulation, Méthode de
Tolérance (technologie)Index. décimale : 668.4 Plastiques, vinyles Résumé : PVC compounder. The new quantec G3 is the third generation of this Buss Kneader series. For processing polyvinyl chloride (PVC) into high-grade pellets, it features a further improvement in price/performance ratio, lower specific processing costs, and still higher throughputs. Note de contenu : - Bundled improvements to detail
- Process technology - the key to throughput and quality
- Barrel casing - standardized but still variable
- Screw elements with patented flights
- Stronger materials
- Upstream and downstream systems
- New benchmark in technology and costsEn ligne : https://www.kunststoffe.de/en/journal/archive/article/pvc-compounder-throughput- [...] Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20284
in KUNSTSTOFFE INTERNATIONAL > Vol. 103, N° 10 (10/2013) . - p. 142-144[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15617 - Périodique Bibliothèque principale Documentaires Disponible Verifying the melting behavior in single-screw plasticization units using a novel simulation model and experimental method / M. Aigner in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 5 (11/2014)
[article]
Titre : Verifying the melting behavior in single-screw plasticization units using a novel simulation model and experimental method Type de document : texte imprimé Auteurs : M. Aigner, Auteur ; Bernhard Praher, Auteur ; Christian Kneidinger, Auteur ; Jürgen Miethlinger, Auteur ; Georg Steinbichler, Auteur Année de publication : 2014 Article en page(s) : p. 624-634 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse thermique
Extrusion filage
Mesure
Modèles mathématiques
Plastification
Polymères -- Fusion
Simulation, Méthode de
UltrasonsIndex. décimale : 668.9 Polymères Résumé : We report on the development of a novel non-invasive ultrasonic measurement system for determining the melting behavior in a single-screw plasticization unit (35/22D) and on a modified drag-induced melt removal model that builds upon that by Tadmor and Gogos (2006). The solid bed to melt pool ratio is quantified using a non-invasive ultrasonic system based on reflection measurements. Automated analysis of the reflected pulses – measured at different axial positions along the barrel – allows the melting process to be monitored online. Our analysis of the delay section incorporates viscous dissipation into Tadmor's drag-induced melt removal model. We link temperature profile and melt film thickness via differential equations and consider viscous dissipation. By segmenting the delay section in the axial direction, the temperature dependency of the thermo-physical material properties is also considered. Using the melting behavior measured for different materials, we verified the mathematical model. Additionally, the effect of reduced screw length on the plasticization process, important for the injection molding process, was investigated. Note de contenu : - EXPERIMENTAL : 1. Materials - 2. Thermal Analysis - 3. Computational Schemes Used in Simulation
- EXPERIMENTAL SETUP
- RESULTS AND DISCUSSION : 1. Simulation Results - 2. Comparison between Simulation and Experimental ResultsDOI : 10.3139/217.2949 En ligne : https://drive.google.com/file/d/1UGKUVSLn6yaqPAf5dRtBqH361NnGvTsW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22242
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Code-barres Cote Support Localisation Section Disponibilité 16633 - Périodique Bibliothèque principale Documentaires Disponible Virtual component development / Martin Giersbeck in KUNSTSTOFFE INTERNATIONAL, Vol. 101, N° 7 (07/2011)
PermalinkVirtual prediction of part failure / Christian Gopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 11 (11/2013)
PermalinkA wear simulation study of nanostructured CVD diamond-on-diamond articulation involving concave/convex mating surfaces / Paul A. Baker in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)
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