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Durability and reliability of large composite wind turbine blades / Galib Abumeri in SAMPE JOURNAL, Vol. 48, N° 6 (11-12/2012)  

[article]  inSAMPE JOURNAL > Vol. 48, N° 6 (11-12/2012) . - p. 7-14 Titre : Durability and reliability of large composite wind turbine blades Type de document : texte imprimé Auteurs : Galib Abumeri, Auteur ; Frank Abdi, Auteur Année de publication : 2012 Article en page(s) : p. 7-14 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse multiéchelle Composites à fibres de verre -- Propriétés mécaniques Durée de vie (Ingénierie) Eoliennes -- Matériaux Fiabilité Matériaux -- Fatigue Pales d'éoliennes Résistance des matériaux Rupture (mécanique) Index. décimale : 620.11 Matériaux (propriétés, résistance) Résumé : Because of its advantageous weight-to-stiffness and weight-to-strength ratios, the E-glass composite has become more attractive in the design of large wind turbine blade. In this paper, material characterization of E-glass composites was performed to determine the composite's static and fatigue properties. Also, durability and damage tolerance (D&DT) and fatigue life analyses based on a multi-scale progressive failure analysis (PFA) were performed to determine a large wind turbine blade made of E-glass composites : a) structural integrity, under 140 mph wind pressure, b) improved structural performance, under 140 mph wind pressure and c) fatigue life and the associated damage under 30-60 mph wind pressures. Note de contenu : - METHODOLOGY : Durability and damage tolerance (D&DT) analysis - Composite material calibration - static strength and stiffness calibration - RESULTS AND DISCUSSION : Large wind blade design configuration - Material static and fatigue calibration and qualification - Static property calibration of E-glass composite - Fatigue life of E-glass composite En ligne : http://enu.kz/repository/2011/AIAA-2011-1819.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16498 [article]

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Polyuréthane composites for wind turbine blades / U. E. Younes in SAMPE JOURNAL, Vol. 48, N° 6 (11-12/2012)

[article]  inSAMPE JOURNAL > Vol. 48, N° 6 (11-12/2012) . - p. 30-37 Titre : Polyuréthane composites for wind turbine blades Type de document : texte imprimé Auteurs : U. E. Younes, Auteur ; Frank W. Bradish, Auteur Année de publication : 2012 Article en page(s) : p. 30-37 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites thermoplastiques Composites thermoplastiques -- Propriétés mécaniques Eoliennes -- Matériaux Epoxydes Essais dynamiques Esters de polyvinyle Gélifiants Pales d'éoliennes Polyuréthanes Résistance à la rupture Ressources renouvelables Rhéologie Traction (mécanique) Index. décimale : 668.4 Plastiques, vinyles Résumé : The wind power industry's move toward developing and manufacturing longer, larger, more productive wind blades requires advances in composites technologies used in their construction. Bayer MaterialScience, LLC developed a new class of stronger and tougher composite materials for the manufacture of 1.5+ MW turbine wind blades. These new low-viscosity, long-gelling VOCs, sustainable raw materials from renewable resources (soy), faster infusion times, and superior tensile fatigue,interlaminar fracture toughness and fatigue crack growth. For example, in tensile fatigue the polyurethane-based composite outperformed VE and epoxy by as much as 9 and 14.8 order of magnitudes. Whereas, at a peak load of 10000 psi the epoxy fractured at 93216 cycles and the VE at 57507 cycles, while the polyurethane fractured only after 849881 cycles. Additionally, in interlaminar fracture toughness testing (G1C), the polyurethane composite with its stable delamination G1C value of 3798 j/m2 outperformed epoxy by a factor of 2, and the vinyl ester by approximately a factor of 3. Similarly, the polyurethane outperformed both the epoxy and vinyl ester samples in fatigue crack growth testing at all stress values. In this paper we will discuss the development of this new polyurethane class of resins and its implication in the manufacture of large wind turbine blades, and compare its performance in composite systems to systems made from epoxy and vinyl ester. Note de contenu : - EXPERIMENTATION : Composite preparation for testing - Long flow, thin laminate infusion trials - Production part scale-up infusion trials - TEST PROCEDURES - RESULTS : System development and viscosity - Neat resin properties - Fatigue - Interlaminar fracture toughness - G1C - SEM - Static load deflection of root rings - Flow rate Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16499 [article]

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Thermoset composite resin matrices / Scott W. Beckwith in SAMPE JOURNAL, Vol. 48, N° 6 (11-12/2012)

[article]  inSAMPE JOURNAL > Vol. 48, N° 6 (11-12/2012) . - p. 42-43 Titre : Thermoset composite resin matrices Type de document : texte imprimé Auteurs : Scott W. Beckwith, Auteur Année de publication : 2012 Article en page(s) : p. 42-43 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites thermoplastiques Thermodurcissables Index. décimale : 668.4 Plastiques, vinyles Résumé : Thermoset composites as a family of materials generally have been the dominant workhorse of both advanced composites and FRP (fiber reinforced plastic) composites for many years. Some thermoset resins are very well known because they are used frequently by the general public : polyester and epoxy systems. Others re also used frequently by the general public but the generic family names are not quite as often heard : phenolics, vinyl esters and polyurethanes. However, overall the thermoset resin family has made significant in-roads into everyday applications within the aerospace, commercial, industrial, sports and recreation, energy and medical fields over the past 50-60 years as composite applications have grown. Note de contenu : - Table 1 : Common thermoset resin matrices and their traditional upper temperature units Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16500 [article]

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Performance drivers with glass fiber composites for wind turbine blades in SAMPE JOURNAL, Vol. 48, N° 6 (11-12/2012)

[article]  inSAMPE JOURNAL > Vol. 48, N° 6 (11-12/2012) Titre : Performance drivers with glass fiber composites for wind turbine blades Type de document : texte imprimé Année de publication : 2012 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composites à fibres de verre -- Moulage par infusion Composites à fibres de verre -- Propriétés mécaniques Matériaux -- Fatigue Pales d'éoliennes Renforts textiles Statistique Stratifiés Index. décimale : 668.4 Plastiques, vinyles Résumé : As traditional material forms and fabrication processes for wind blades evolve, a number of studies by wind original equipment manufacturers and academic institutions have focused around the determination of the key performance variables that affect the overall performance of glass based composite laminates in terms of their static properties, their interfacial characteristics and their dynamic (cyclic fatigue) properties. The effect of mean glass filament diameter, direct draw roving linear density, and areal weight of fabric reinforcements among other variables on the key mechanical properties for wind blades is summarized. Note de contenu : - EXPERIMENTATION : Parametric study - RESULTS : Weft inserted fabric laminates - Dry wound infused laminates - Statistical analysis Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16501 [article]

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