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Measuring the gloss of curved surfaces / B. Duncan in SURFACE COATINGS INTERNATIONAL, Vol. 79, N° 4 (04/1996)
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Titre : Measuring the gloss of curved surfaces Type de document : texte imprimé Auteurs : B. Duncan, Auteur Année de publication : 1996 Article en page(s) : p. 185-190 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Etude expérimentale' Réflectométrie 'Analyse surface' 'Surface courbe' 'Configuration cylindrique' Index. décimale : 667.9 Revêtements et enduits Résumé : The measurement and control of surface appearance is important to a wide range of industries as the appeal of finished goods can depend strongly on the visual appearance of their surfaces. Many techniques are employed to quantify the appearances of surfaces, measuring properties such a haze, colour, specular gloss or distinctness of image. Specular gloss can be defined as the proportion of light reflected from a standard surface. This measurement is relatively straight forward to make and standard methods for measuring gloss have been developed for use in industries such as paper manufacture, paints and coatings, metals and plastics. Many manufacturers make fixed angle reflectometer instruments (known as gloss meters) which conform to these standards.
Different measurement procedures are required when measuring curved surfaces. Gloss meter manufacturers have developed meters with reduced illumination areas to imrove the measurement of curved surface gloss. The work in the present paper addresses the measurement of the gloss of cylindrical surfaces. Such surfaces have curvatures simply defined by the cylinder radius and readily identifiable axes of symmetry. Measurements were made of the gloss of cylindrical surfaces to assess the performance of gloss meters. Simple models to calculate the expected performance of meters on the cylindrical surfaces are discussed.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17042
in SURFACE COATINGS INTERNATIONAL > Vol. 79, N° 4 (04/1996) . - p. 185-190[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006570 - Périodique Bibliothèque principale Documentaires Disponible Producing large, double-curved fibre-metal laminate fuselage panels / Brent Vermeulen in JEC COMPOSITES MAGAZINE, N° 31 (03-04/2007)
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Titre : Producing large, double-curved fibre-metal laminate fuselage panels Type de document : texte imprimé Auteurs : Brent Vermeulen, Auteur ; Michel Jansen, Auteur ; Giel van der Kevie, Auteur Année de publication : 2007 Article en page(s) : p. 103-106 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'Propriété mécanique' Modélisation 'Fibre minérale' Aérospatiale Fuselage Application 'Etude théorique' 'Simulation numérique' 'Relation contrainte déformation' 'Modèle Moulage Plissement 'Défaut fabrication' 'Forme courbe' Panneau Aluminium 'Matériau composite' verre' renforcé fibre' Epoxy 'Stratifié métal FML Index. décimale : 668.4 Plastiques, vinyles Résumé : Placing flat metal sheets in a double-curved mould will result in wrinkling of the sheet. Limiting the width of the metal sheets can reduce this wrinkling, but will increase part count of the laminate. An analytical model has been developed to calculate the maximum allowable width of the metal sheets, assuring producibility. Note de contenu : - The splicing concept
- Problem statement and solution approach
- Measuring of strains in an aluminium sheet when placed in an industrial mould
- Finite element simulation of the test
- Analytical model development based on a finite difference approach
- Analysis of the results, comparing test results, FE simulation and analytical modelPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14208
in JEC COMPOSITES MAGAZINE > N° 31 (03-04/2007) . - p. 103-106[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006342 - Périodique Bibliothèque principale Documentaires Disponible