Climat. Des modèles toujours plus complexes / Pierre Sepulchre in INDUSTRIE & TECHNOLOGIES, N° 1062 (06/2023)  

[article]  inINDUSTRIE & TECHNOLOGIES > N° 1062 (06/2023) . - p. 51-56 Titre : Climat. Des modèles toujours plus complexes Type de document : texte imprimé Auteurs : Pierre Sepulchre, Auteur ; Arnaud Caubel, Auteur Année de publication : 2023 Article en page(s) : p. 51-56 Langues : Français (fre) Catégories : Climatologie Modèles mathématiques Réchauffement climatique Index. décimale : 551.6 Climatologie et temps Résumé : Le système climatique comprend de nombreuses composantes en interaction. Leur compréhension de plus en plus fine et l'essor des moyens de calcul améliorent les simulations numérique du climat passé, présent et futur. Ces avancées sont essentielles pour appréhender les retombées des émissions de gaz à effet de serre d'origine humaine sur le climat. Note de contenu : - De la météorologie aux modèles de climat - Une grande diversité de modèles et de questions scientifiques - L'exécution des tâches sur le supercalculateur - Le modèle du climat français utilisé par le GIEC - Le futur de la modélisation climatique - Fig. 1 : Composition d'un modèle de climat - Fig. 2 : Les différentes étapes pour créer un modèle - Fig. 3 : Les ressources de calcul nécessaires - Fig. 4 : A chaque question son modèle - Fig. 5 : Le calcul haute performance à mettre en oeuvre En ligne : https://drive.google.com/file/d/1ZYJoMjD2gCJbBKec7nchYQX_CY2fO14C/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39427 [article]

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Coalescence and film formation from latexes / Kenneth L. Hoy in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 853 (02/1996)

[article]  inJOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 68, N° 853 (02/1996) . - p. 33-39 Titre : Coalescence and film formation from latexes Type de document : texte imprimé Auteurs : Kenneth L. Hoy, Auteur Année de publication : 1996 Article en page(s) : p. 33-39 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Coalescence (Sciences physiques) Formation de film Latex Mesure Modèles mathématiques Revêtement en phase solvant:Peinture en phase solvant Thermodynamique Index. décimale : 667.9 Revêtements et enduits Résumé : A paint is a complex liquid coating material composed of pigments, fillers, polymeric binders, and other additives dispersed and/or dissolved in a liquid. When applied to a surface, the liquid is changed by a film forming process to a solid, adherent composite film. The formation of a paint film is so spontaneous and familiar that most give little thought to the mechanism and dynamics of the process. Yet it is the dynamics of film formation thot can provide perspective to the design and application of polymeric latexes. Previously, a number of workers have studied the mechanism by which the latex particles coalesce with each other. Their attention has been focused on the details of how particle-particle contacts and interactions take place. It is the author's intent to emphasize the thermodynamics of the filming process. A general theory of film formation from a paint is derived from thermodynamic considerations. Model calculations are made and the results are encouraging. They are able to predict the effect of pigmentation and identify new areas for polymer and formulation research. The theory is capable of being specialized for either solvent or latex systems. Note de contenu : - FILM FORMATION SOLVENT-BORNE PAINT - FILM FORMATION FROM LATEX PAINTS - VOLUME RELATIONSHIPS : Basic volume definitions - Volume relationships in solvent paints - Volume relationships in latex paints - THERMODYNAMIC CONSIDERATIONS - TEST OF THE MODEL : Methods of measuring film formation - Film stress measurements Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18314 [article]

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A combined experimental and modelling approach towards an optimized heating strategy in thermoforming of thermoplastics sheets / Bart Buffel in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 3 (07/2017)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. XXXII, N° 3 (07/2017) . - p. 378-386 Titre : A combined experimental and modelling approach towards an optimized heating strategy in thermoforming of thermoplastics sheets Type de document : texte imprimé Auteurs : Bart Buffel, Auteur ; B. van Mieghem, Auteur ; A. van Bael, Auteur ; F. Desplentere, Auteur Année de publication : 2017 Article en page(s) : p. 378-386 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chauffage Matières plastiques -- Thermoformage Modèles mathématiques Rayonnement infrarouge Index. décimale : 668.4 Plastiques, vinyles Résumé : Determining the operational settings for the heating equipment in thermoforming is still mainly done by trial and error as well as personal experience. Depending on the type of IR heating equipment, these settings can be the consumed electrical power or the desired temperature of the heating elements. In this study, a workflow is developed, applied and validated to characterize the IR heating equipment and to determine the optimal heating strategy. The workflow starts with an on-site equipment/machine characterization, which takes all machine and environment parameters into account. This approach results in the optimal heater setting and heating duration in order to obtain a through thickness temperature distribution which lies within a predefined forming range. The proposed methodology is universally applicable as it can deal with different types of sheet material and thicknesses. Moreover it can be applied to any type of IR heating element (halogen, metal foil, ceramic or quartz). Moreover, the methodology can easily be implemented in an industrial environment. Additionally, an estimate for the thermal efficiency of halogen heater equipment can be determined. Note de contenu : - EXPERIMENTAL - MODELLING - RESULTS AND DISCUSSION : In situ temperature measurements - Determination of the equipment specific heating parameters - Thermal efficiency of the halogen heating equipment - Optimized heating settings for a light cover application DOI : 10.3139/217.3370 En ligne : https://drive.google.com/file/d/13tO1hl6snTNQCS30LA33NDJAsmsgt8Da/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28839 [article]

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A comparative analysis of the comfort of leather and substitute materials, especially for footwear / Wilfried Diebschlag in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXIII (Année 1978)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXIII (Année 1978) . - p. 307-332 Titre : A comparative analysis of the comfort of leather and substitute materials, especially for footwear Type de document : texte imprimé Auteurs : Wilfried Diebschlag, Auteur Année de publication : 1978 Article en page(s) : p. 307-332 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chaussures -- Matériaux Confort Cuir Etudes comparatives Modèles mathématiques Pied Thermocinétique Transpiration Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : To develop the most satisfactory concept on which ta base the requirements for materials to he used for garments or footwear, the following data about man (which can vary among the different races) must be known : 1. Heat emission of different areas of the skin and heat distribution in the body, and 2. Water vapor and sweat emission from different areas of the skin. Both these factors must he considered under various conditions of stress and strain (physical or mental exercise, expressed in watts or joules per hour) ; under different climatic conditions (temperature, humidity, air movement) ; and with a variety of types of clothing. For 14 combinations of these factors, the basic data were established in tests over several years with subjects wearing different clothing under various conditions. At the same time, the physical properties of the materials worn were measured by test instruments, in particular such properties as their behavior towards water, water vapor, and heat, and their drying time. Note de contenu : - 1. INTRODUCTION : Wilson, the man who paved the way - The range of application of leather - 2. THE THERMOPHYSIOLOGICAL SURVEY OF MAN : THE BASIS FOR IMPROVED FOOTWEAR : Foot-sock-shoe as a microclimate functional system - Distribution of sweat glands and rate of sweat secretion - The influence of footwear on the microclimate in the shoe - Recommendations of the physiologist for shoe manufacturers - 3. THERMODYNAMIC PROGRAM FOR CALCULATION OF HEAT TRANSFER : Mechanisms of heat transfer from the body to the environment - Dry heat transfer - Evaporative heat transfer - Calculation for steady state - Examples of calculation fo r the functional system foot-shoe - Table 1 : Skin temperatures and heat and vapor flow under different conditions of activity, dress, and climate - Table 2 : Perspiration of man's body and foot compared to the water vapor characteristics of footwear materials - Table 3 : Constants for the calculation of variables Bi and Ti for various areas of the body - Table 4 : Physical characteristics of footwear - Table 5 : Physiological data of the foot when sitting or walking En ligne : https://drive.google.com/file/d/1MtcWd6Uqy4_IIWFlBxRmxcQWkyETU-UV/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41154 [article]

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A comparison between a solid block made of concrete and others made of different composite materials / Emad Toma Karash in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 31, N° 6 (12/2021)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 31, N° 6 (12/2021) . - p. 341-347 Titre : A comparison between a solid block made of concrete and others made of different composite materials Type de document : texte imprimé Auteurs : Emad Toma Karash, Auteur ; Tymor Abed Alsttar Sediqer, Auteur ; Mohammad Takey Elias Kassim, Auteur Année de publication : 2021 Article en page(s) : p. 341-347 Note générale : Bibliogr. Langues : Français (fre) Catégories : Composites à fibres de carbone -- Propriétés mécaniques Composites à fibres de verre -- Propriétés mécaniques Contraintes (mécanique) Déformations (mécanique) Elasticité Eléments finis, Méthode des Etudes comparatives Fibres de carbone Fibres de verre Matériaux cimentaires Matériaux cimentaires -- Propriétés mécaniques Modèles mathématiques Solides Index. décimale : 668.4 Plastiques, vinyles Résumé : In this research, three mathematical models were designed, the first consisting of concrete, the second from carbon fiber, and the third from s-glass fiber, in order to compare the strength of composite materials to different stresses and deformations, because composite materials are better than concrete in terms of weight and shape and do not need to be applied to painting operations in addition to the fact that their thermal insulation is higher than Concrete in high proportions. From the results of the comparison, it was found that the second model was the best model in terms of bearing deformations, as the deformation percentage in it did not exceed the deformation of concrete a lot, reaching (17%), which is a very small percentage, and the stresses towards pregnancy for the second and third models were much better than the bearing of the first model, but the results indicate that the Von Mises Stress in the second model is higher than the first model by a percentage (57%), while the comparison of the third model with the first was the rate of increase percentage (47%). Note de contenu : - Materials and models analysis - Table 1 : Elastic characteristics of carbon fiber and fiberglass - Table 2 : Elastic characteristics of carbon fiber and fiberglass - Table 3 : Specifications used in building mathematical models in the ANSYS 15.0 program - Table 4 : Results of test first model (Concrete) by using ANSYS -15.0 program - Table 5 : Results of test second model (Carbon Epoxy) by using ANSYS -15.0 program - Table 6 : Results of test third model (S - Fiberglass) by using ANSYS -15.0 program DOI : https://doi.org/10.18280/rcma.310605 En ligne : https://www.iieta.org/download/file/fid/66504 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37691 [article]

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Comportement et endommagement dynamique multi-échelle de composites SMC-R26 / Zouhaier Jendli in MATERIAUX & TECHNIQUES, N° 3-4 (03-04/2005)  

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Comportement rhéologique stationnaire d'une dispersion concentrée de silice-Bentonite : modélisation et aspects prédictifs / Patricia Berthier in LES CAHIERS DE RHEOLOGIE, Vol. XII, N° 4 (01/1995)

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Comportement rhéologique de suspensions colloïdales concentrées monodispersées et bidispersées / I. Talbi in LES CAHIERS DE RHEOLOGIE, Vol. XII, N° 1 (11/1993)

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Composites à fibres piézoélectriques pour l'amortissement de vibrations / Amen Agbossou in MATERIAUX & TECHNIQUES, N° Hors série (2002)

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Computational modeling of polymers / Jozef Bicerano / New York [United States] : Marcel Dekker, Inc. (1992)

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Conception et qualification élastique de structures multicouches gauches et courbes à base de bois / F. Bos in LES CAHIERS DE RHEOLOGIE, Vol. XIV, N° 1 (09/1995)

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Contribution de la méthodologie de la recherche expérimentale à l'étude des relations structure-réactivité / Didier Mathieu / 1981

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Conveyor belt modelling in extrusion flow simulation / Benoît Debbaut in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 1 (2023)  

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Crystallization of polymers in processing conditions : An overview / Jean-Marc Haudin in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 5 (11/2017)  

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Damage modelling of composites / Michaël Bruyneel in JEC COMPOSITES MAGAZINE, N° 90 (06-07/2014)

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La déformation des outillages maîtrisée / Jean-François Luye in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 857 (05/2008)

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Dégradation du méthanal en solution par photocatalyse TiO2/UV / Anaëlle Cloteaux in L'ACTUALITE CHIMIQUE, N° 390 (11/2014)

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Designing for damage tolerance / Andrew T. Rhead in JEC COMPOSITES MAGAZINE, N° 88 (04/2014)

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Development and application of a mathematical model to explain fading rate inconsistencies observed in light-sensitive materials / Marion F. Mecklenburg in COLORATION TECHNOLOGY, Vol. 128, N° 2 (2012)  

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Development of erosion equations for removal of organic coating on carbon fiber reinforced polymer surface by plastic abrasive in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)  

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