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Viscoelastic mechanical model of asphalt concrete considering the influence of characteristic parameter of fiber content / Chunshui Huang in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 31, N° 5 (10/2021)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 31, N° 5 (10/2021) . - p. 283-290 Titre : Viscoelastic mechanical model of asphalt concrete considering the influence of characteristic parameter of fiber content Type de document : texte imprimé Auteurs : Chunshui Huang, Auteur ; Danying Gao, Auteur ; Peibo You, Auteur Année de publication : 2021 Article en page(s) : p. 283-290 Note générale : Bibliogr. Langues : Français (fre) Catégories : Composites à fibres -- Propriétés mécaniques Fibres polyesters Flexion (mécanique) Fluage Matériaux bitumineux Matériaux cimentaires Matériaux cimentaires -- Propriétés mécaniques Poutres Viscoélasticité Index. décimale : 677.4 Textiles artificiels Résumé : This paper carries out bending creep tests on polyester fiber-reinforced asphalt concrete beams, and investigates how the volume ratio and aspect ratio of the fibers influence the parameters of viscoelastic mechanical model and the viscoelastic performance of the asphalt concrete. The results show that: with the growing volume ratio and aspect ratio of the fibers, the midspan deflection and bottom flexural-tensile strain of asphalt concrete beams first dropped and then rose over time; the characteristic parameter of fiber content (FCCP) could reflect the overall effects of the volume ratio and aspect ratio of the fibers. On this basis, a viscoelastic mechanical model was established for the asphalt concrete in the light of the influence of FCCP. The test and theoretical results show that, in our tests, the optimal volume ratio of fibers, optimal aspect ratio of fibers, and optimal FCCP are 0.348, 324, and 1.128 for polyester fiber-reinforced asphalt concrete. Note de contenu : - Methodology - Viscoelastic Deformation Features Influence of fiber volume ratio and fiber aspect ratio on viscoelastic model parameters and viscoelastic performance - Viscoelastic model and viscoelasticity analysis - Tables : Relationship between parameters of formula (2, 3, 4 and 5) and fiber volume ratio and fiber aspect ratio DOI : https://doi.org/10.18280/rcma.310503 En ligne : https://www.iieta.org/download/file/fid/63497 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37686 [article]

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Study of the swelling of a composite based on argan nut, urea-formaldehyde and water as a non-polluting solvent / Fouad Babty in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 31, N° 5 (10/2021)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 31, N° 5 (10/2021) . - p. 297-300 Titre : Study of the swelling of a composite based on argan nut, urea-formaldehyde and water as a non-polluting solvent Type de document : texte imprimé Auteurs : Fouad Babty, Auteur ; Abdelilah Hachim, Auteur ; M'barka Mourabit, Auteur ; Soumia Mordane, Auteur ; Amina Bettachy, Auteur ; Abdeslam El Assyry, Auteur Année de publication : 2021 Article en page(s) : p. 297-300 Note générale : Bibliogr. Langues : Français (fre) Catégories : Arganier et constituants Biomatériaux Composites à fibres végétales Copolymère urée formaldéhyde Coquille de noix d'argan Gonflement (physique) Index. décimale : 668.4 Plastiques, vinyles Résumé : In the center and southwest of Morocco, there is an endemic tree "Argania Spinosa" known as the ironwood. The miraculous product of this millenary tree is argan oil. Known for its therapeutic and cosmetic properties. Only 20% of the fruit of the argan tree is intended for the manufacture of argan oil while the shell, which represents 80%, remains an unexploited resource. This hull, which is sold by farmers at low prices, is used as fuel for baths and Moorish bakeries. In order to value the shells ; first, we sort, grind and sieve them. Second, we bind the particles into adhesive. Three biomaterials are based on three particle sizes of shell grains. The designed particles are bound with an adhesive powder that is produced from a pre-catalyzed urea-formaldehyde resin. Moreover, the water used is a non-polluting solvent. The biomaterials and two samples of Red and Beech Wood were immersed in water for 15 days, with mass measurements that were done on a daily basis. It was concluded that the swelling coefficient of the large distribution of biomaterial is smaller than the small distribution of biomaterial. However, Red and Beech Wood have the highest coefficient. Note de contenu : - Procedure - Swelling rate measurement - Table 1 : Nut-shells of Argan particles distribution 3. Results and Discussion DOI : https://doi.org/10.18280/rcma.310505 En ligne : https://www.iieta.org/download/file/fid/63485 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37687 [article]

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A contribution to analytical solutions for buckling analysis of axially compressed rectangular stiffened panels / Victor Tochukwu Ibeabuchi in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 31, N° 5 (10/2021)  

[article]  inREVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 31, N° 5 (10/2021) . - p. 301-306 Titre : A contribution to analytical solutions for buckling analysis of axially compressed rectangular stiffened panels Type de document : texte imprimé Auteurs : Victor Tochukwu Ibeabuchi, Auteur ; Mathias Owus Ibearugbulem, Auteur ; Kelechi Okechukwu Njoku, Auteur ; Ezekiel Onyinyechi Ihemegbulem, Auteur ; Princewill Obumneke Okorie, Auteur Année de publication : 2021 Article en page(s) : p. 301-306 Note générale : Bibliogr. Langues : Français (fre) Tags : 'Approche  analytique'  Flambage  'Méthode  Ritz'  'Panneaux  raidis'  'Fonction  de  déviation  exacte' Index. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : Analytical solution to the buckling problems of stiffened panels subjected to in-plane compressive loads is presented. The total potential energy functional of stiffened panel is obtained by the summation of that of a line continuum and stiffened panel derived from elastic principles of mechanics. Minimizing the resulting equation with respect to deflection coefficient and rearranging gives the expression for obtaining the buckling load of stiffened panel. Exact deflection functions were substituted directly in the new solution and various edge conditions were considered in this analysis. Obtained results were compared with analytical results of previous works. The method is computationally efficient for complex edge conditions and gives high numerical accuracy. Note de contenu : - Panel definition and boundary condition - Theoretical Formulations : Stiffened SSSS platesStiffened CSCS plates - Table 1 : Stiffness coefficients for plates and stiffeners - Table 2 : Comparison of buckling coefficient K with previous works for one stiffener - Table 3 : Comparison of buckling coefficient K with previous works for two stiffeners DOI : https://doi.org/10.18280/rcma.310506 En ligne : https://www.iieta.org/download/file/fid/63495 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37688 [article]

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