An experimental study on the role of manufacturing parameters on the dry sliding wear performance of additively manufactured PETG / Berkay Ergene in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 3 (2022)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. 37, N° 3 (2022) . - p. 255-270 Titre : An experimental study on the role of manufacturing parameters on the dry sliding wear performance of additively manufactured PETG Type de document : texte imprimé Auteurs : Berkay Ergene, Auteur ; Cagin Bolat, Auteur Année de publication : 2022 Article en page(s) : p. 255-270 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Frottements (mécanique) Impression tridimensionnelle Matériaux -- Epaisseur Mesure Polyéthylène téréphtalate glycol Taux de remplissage (technologie) Tribologie (technologie) Usure (mécanique) Index. décimale : 668.9 Polymères Résumé : Additive manufacturing (AM) is a versatile and promising method for rapid prototyping and advanced design applications. Owing to its unique potential for fast production rates, and capacity of creating complex shapes, the number of researches on AM techniques have increased day by day in the technical literature. In this work, contrary to common literature efforts focused on mechanical properties, friction and wear behaviors of additively manufactured PETG samples were analyzed experimentally. As a methodology, fused filament fabrication (FFF) was selected. In order to explore the influence of manufacturing factors on wear properties, layer thickness (0.1, 0.2, and 0.3 mm), infill rate (40, 60, 80, and 100%), and building direction (vertical and horizontal) were changed. Before the friction tests, dimensional accuracy, hardness, and surface roughness measurements were conducted to interpret better the wear results. In addition, macroscopic and microscopic inspections were performed to determine the correct reason behind the deformation. From the data collected during the tests, there was a positive interaction between volume loss and layer thickness. Besides, there was no direct interaction between infill rate/building direction and coefficient of friction. In comparison with vertically built samples, horizontally built samples were subjected to more plastic deformation, and their worn surfaces were severely damaged. Note de contenu : - MATERIAL AND METHODOLOGY : Filament material and manufacturing - Dimensional accuracy measurements - Hardness measurements - Surface roughness measurements - Wear test procedure - RESULTS AND DISCUSSION : Dimensional accuracy - Hardness - Surface roughness - Tribological properties - Wear mechanisms - Table 1 : Material properties of PETG filament - Table 2 : 3D printing process parameters - Table 3 : The average accuracy percentage obtained from dimensional measurements of cylindrical sample DOI : https://doi.org/10.1515/ipp-2021-0015 En ligne : https://drive.google.com/file/d/12N5Uiq-s3wa6d0OOg1JqCYh_QpvMA-b5/view?usp=shari [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37905 [article]

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Artificial neural network modeling of tablet coating in a pan coater / Assia Benayache in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 485-499 Titre : Artificial neural network modeling of tablet coating in a pan coater Type de document : texte imprimé Auteurs : Assia Benayache, Auteur ; Lynda Lamoudi, Auteur ; Kamel Daoud, Auteur Année de publication : 2023 Article en page(s) : p. 485-499 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Comprimés Enrobage pharmaceutique Ethylcellulose Matériaux -- Epaisseur Réseaux neuronaux (informatique) Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Our study decided to use the new and revolutionary approach in the field of pharmaceutical coating processes called the artificial neural network (ANN) by using the neural networks toolbox derived from the Matlab® software. The experiments were performed using tablets of Alfuzosin Chlorhydrate as a model filler, and an aqueous solution of Surelease as a polymer in different contents. The various parameters that can affect coating thickness, weight gain, and the coefficient of variation CV, such as spray rate, air pressure, solid content, speed of the drum, pan loading, and time of coating, were studied. The properties of the coated tablets were evaluated using the ANN, and both the parameters of the coating process and the properties of the coated tablets were used as a basis for optimization, as well as the choice of the optimal structure of the ANN model. It was found that the best neural network architecture had 7 neurons in the hidden layer, with a mean square error of 3.515 and a determination coefficient of nearly 1. The relative importance of each independent variable was quantified using the Garson equation. In this study, spray rate was found to have the highest impact on the properties of tablets. Note de contenu : - MATERIALS AND METHODS : Characterization of core tablets - Coating dispersion - Coating process - Characterization of the coating solution - Characterization of coating tablets - RESULTS AND DISCUSSION : Model architecture and prediction - Relative importance of input variables - The influence of parameters on the properties of coating tablets - Optimization of coating tablets - Table 1 : Effect of solids concentration on the viscosity, density, and surface tension of coating fluids measured coating - Table 2 : Variable parameters - Table 3 : ANN model's weight and bias matrix - Table 4 : Effects of coating parameters on the relative standard deviation at the final process stage - Table 5 : Ideal values of inputs, predicted and experimental values of outputs DOI : https://doi.org/10.1007/s11998-022-00683-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00683-1.pdf?pdf=button Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39293 [article]

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Compressive and tensile properties of ABS material as a function of 3D printing process parameters / Hind B. Ali in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 32, N° 3 (06/2022)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 32, N° 3 (06/2022) . - p. 117-123 Titre : Compressive and tensile properties of ABS material as a function of 3D printing process parameters Type de document : texte imprimé Auteurs : Hind B. Ali, Auteur ; Jawad K. Oleiwi, Auteur ; Farhad M. Othman, Auteur Année de publication : 2022 Article en page(s) : p. 117-123 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contraintes (mécanique) Dépôt de fil fondu Impression tridimensionnelle Matériaux -- Epaisseur Matières plastiques -- Propriétés mécaniques Modélisation par dépôt en fusion Plan d'expérience Traction (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : Additive Manufacturing (AM) technologies have been emerged as a fabrication method to obtain engineering components within a short span of time. 3D printing, also referred as additive layer manufacturing technology is one of the powerful methods of rapid prototyping (RP) technique that fabricates three-dimensional engineering components. fused deposition modelling (FDM) is one of the most commonly used additive manufacturing (AM) methods, with applications in modelling, prototyping, and production. Acrylonitrile–butadiene–styrene (ABS) is a widely used industrial thermoplastic that is also the most commonly used material in FDM technology. Understanding the impact of FDM build settings on material characteristics is essential for predicting the behaviour of ABS components. The purpose of this study is to determine the impact of specimen tensile and compressive behaviour on ABS components produced using FDM. The Ultimaker+2 printer is used to create ABS thermoplastic samples for the investigation. The samples are put through their tests using a modified form of ASTM D638 for tensile strength and ASTM D695 for compressive strength. An Instron testing machine is used to put the printed parts to the test. The approach employed was Design of Experiment (DOE). Three primary criteria are used in the plastics experiment: infill density, layer thickness, and infill pattern. We measured the tensile and compressive strengths of zigzag and gyroid specimens, as well as cross specimens. The highest compressive strength at break (25.01 MPa), Young's modulus (2.473 GPa), fracture strength (21.016 MPa), and ultimate tensile stress (23.1 MPa) were all discovered in a sample with 60% infill density, 0.05mm layer thickness, and a GYROID infill pattern. Note de contenu : - Experimental Work : Process parameters - Design of experiments - Table 1 : Mechanical Characteristics of ABS - Table 2 : The most important factors and their levels - Table 3 : L9 orthogonal array - Table 4 : Design of experiment and tensile and compressive test results (Mpa) - Table 5 : S/N ratios for tensile and compressive characteristics (MPa) DOI : https://doi.org/10.18280/rcma.320302 En ligne : https://www.iieta.org/download/file/fid/77313 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38178 [article]

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Declaring war on quench marks / Christian Hopmann in KUNSTSTOFFE INTERNATIONAL, Vol. 108, N° 11 (11/2018)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 108, N° 11 (11/2018) . - p. 37-41 Titre : Declaring war on quench marks : The correct plug geometry makes the wall thickness more homogenous Type de document : texte imprimé Auteurs : Christian Hopmann, Auteur ; Dennis Balcerowiak, Auteur Année de publication : 2018 Article en page(s) : p. 37-41 Langues : Anglais (eng) Catégories : Bouchons en matières plastiques Conception technique Matériaux -- Allègement Matériaux -- Epaisseur Matières plastiques -- Thermoformage Index. décimale : 668.4 Plastiques, vinyles Résumé : In addition to the choice of forming process parameters, the design of the pre-stretching plug in particular affects the wall thickness distribution. By directing plastic material into areas where thin spots develop during forming when using only compressed air, the material consumption and therefore weight can be reduced while maintaining a consistent component quality, simultaneously reducing the risk of quench mark formation during production. Note de contenu : - Plug-assisted thermoforming - Development and design of pre-stretching plug geometries - Studies of the stretching distance and timing of compressed air activation - Influence of the plug geometry - Fig. 1 : Tool Geometry, plug dimensions, and measuring path to evaluate the produced cups. The invervals between the measuring points are 5 mm - Fig. 2 : Wall thickness distribution of a cup produced without plug stretching and calculated, theoretical, homogenous wall thickness of a cup with the same mass (red line). For improved clarity, the respective values across from each other in the component have been averaged and shown on one cup half in the following diagrams - Fig. 3 : Plug geometries : these shapes were developed to analyze the influence on the wall thickness distribution - Fig. 4 : Preliminary investigation : the influence of the compressed air activation timing is low, the plug stretching distance on the other hand has a greater influence on the wall thickness distribution - Fig. 5 : The plug edge radius with a constant wall incline mainly exhibits influences on the floor of the component - Fig. 6 : Variation of the plug wall angles with a constant plug edge radius shows a considerable influence on the wall thickness distribution - Fig. 7 : Using a cone-shaped, pointed plug produces a heterogeneous wall thickness distribution En ligne : https://drive.google.com/file/d/1m0zPYnoyQaXxfy-wLzHlFUY0fkyjaK2g/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31538 [article]

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Dynamic interferometric imaging of the thickness distribution of evaporating thin liquid films / Jacqueline Stamm in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 6 (11/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 6 (11/2019) . - p. 1663-1671 Titre : Dynamic interferometric imaging of the thickness distribution of evaporating thin liquid films Type de document : texte imprimé Auteurs : Jacqueline Stamm, Auteur ; Dominik Daume, Auteur ; Tobias Hartwig, Auteur ; Maximilian Oschmann, Auteur ; Julian Schäfer, Auteur ; Hans Martin Sauer, Auteur ; Edgar Dörsam, Auteur Année de publication : 2019 Article en page(s) : p. 1663-1671 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Couches minces Epaisseur -- Mesure Gravure Imagerie (technique) Matériaux -- Epaisseur Revêtement en phase solvant Tags : 'Interférence  en  couches  minces'  'Impression  de  gravure'  fonctionnelle'  'Films  séchage'  'Carte  d'épaisseur'  'Evolution  l'épaisseur' Index. décimale : 667.9 Revêtements et enduits Résumé : In functional printing, film homogeneity is a key criterion, but there are several phenomena leading to inhomogeneities. We shall focus on the solvent evaporation process of gravure-printed thin films. The best aspects of different published approaches are combined to create a new algorithm for optically determining the film thickness development. In this way, small structures as well as the overall thickness of large-area thin films can be tracked while drying. It becomes clear that the biggest challenge is balancing the camera resolution and frame rate to receive plausible and accurate results. Note de contenu : - Introduction : Challenges - State of the art - Developed model - EXPERIMENTAL SETUP, MATERIALS, AND IMAGE PROCESSING - RESULTS AND DISCUSSION : Thickness evolution of one pixel - Film thickness maps DOI : 10.1007/s11998-019-00236-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00236-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33419 [article]

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Effects of aging on the thickness of a homogeneous film fabricated using a spin coating process / Do Hyung Han in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 3 (05/2021)  

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Flow stabilization and coating thickness reduction through use of multi-slot air-knife in gas jet wiping / J. R. McDermid ; Andrew N. Hrymak ; F. E. Goodwin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)  

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Getting the right tool for every application in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 12, N° 3 (2019)  

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Improving the thickness distribution of parts with hybrid thermoforming / Fernando M. Duarte in INTERNATIONAL POLYMER PROCESSING, Vol. 37, N° 4 (2022)  

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Infinite possibilities in ADHESIVE TECHNOLOGY, Vol. 18, N° 3 (09/2001)

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Influence of gradient structure on functional characteristics of PET nonwovens / Gajendra Kumar Tyagi in MAN-MADE FIBERS INTERNATIONAL, Vol. 73, N° 1 (2023)  

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Influence of mold cavity thickness on electrical, morphological and thermal properties of polypropylene/carbon micromoldings / Shengtai Zhou in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 2 (2023)  

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Influence des propriétés thermiques des pré-imprégnés composites thermoplastiques pour l'enroulement filamentaire laser / Benoît Courtemanche in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 28, N° 1 (01-02-03/2018)

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L'innovation au coeur des procédés / Michel Biron in CAOUTCHOUCS & PLASTIQUES, N° 795 (05/2001)

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Low-emissivity topcoats for the reduction of thermal infrared emissions from military platforms / Kelly Lance C. in COATINGS TECH, Vol. 17, N° 4 (04/2020)  

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Neural network-based UV adjustment of the photopolymer surface for modification of coating properties printed in flexography / Sanja Mahovic Poljacek in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)  

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A novel non-planar transverse stretching process for micro-porous PTFE membranes and resulting characteristics / Y.-H. Chang in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 1 (03/2018)  

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Numerical investigation of multiple-slot jets in air-knife wiping / A. Yahyaee Soufiani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 5 (09/2017)  

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Les performances mécaniques des panneaux LVL : revue bibliographique des principaux facteurs d'influence / Hafida El Haouzali in MATERIAUX & TECHNIQUES, Vol. 108, N° 1 (2020)  

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Les propriétés spécifiques des cuirs destinés à la chaussure de sécurité / M. Debouit in TECHNICUIR, N° 7 (08-09/1976)  

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