Ingeniería Civil y Mecánica

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Subject: search.filters.subject.FIBRA DE ÁBACA

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    Optimización (Doe-Mezclas) del material híbrido con refuerzos de fibra de abacá, fibra de cabuya y fibra de vidrio de matriz de resina poliéster y su incidencia sobre las propiedades mecánicas a flexión, tracción e impacto
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2020-08) Chiluiza Toapanta, William Patricio; Paredes Salinas, Juan Gilberto
    It posed develop this investigation with the purpose of avoid ignorance in the design of Experiments with mixtures, this is applied to the Mechanical Engineering in the field of composite materials to be able optimize and determinate the best characteristics of the material. The method applied is the design of experiments with mixtures (DOE) the compound of fiberglass, Abaca and Cabuya with the matrix resin polyester applied for the simplexlattice design to determine the optimum mix. It determined a total of ten treatments, and each one forms the one hundred percent of the compound is formed, of which were made 150 specimens to tensile, flexion and impact test with the application of the standards of the ASTM 3039, ASTM 7264 and ASTM 5628 respectively. The results were analyzed to comply the assumptions of normality, equality of variance and waste independence otherwise the data were transformed to adjust the data to BoxCox. The previously analyzed data is passed to Minitab to optimize and determine the best volumetric fraction, finding a percentage of 20.07 for fiberglass, while natural fibers have a percentage of 4.85 percent for Abaca and Cabuya fiber of 5.08 percent. In addition, with the 70 percent Polyester Resin as constant this completes 100 percent of the material composite mix. With this combination it gets better mechanical properties to Traction, Flexion and Impact.
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    Optimización (Doe-Mezclas) del material híbrido con refuerzos de fibra de abacá, fibra de cabuya y fibra de vidrio de matriz de resina epóxica y su incidencia sobre las propiedades mecánicas a flexión, tracción e impacto
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2020-08) Torres Mesias, David Esteban; Paredes Salinas, Juan Gilberto
    The following experimental work was aimed at finding new combinations of composite materials conformed of fiberglass (VF), abaca fiber (FA) and cabuya fiber (FC) with epoxy matrix. For this it was used different volumetric mixtures of reinforcements, the same ones that were considered as input parameters in the statistical analysis of mixtures to optimize the mechanical properties of the results of the different treatments. Specimens were made by compression stratification to then test them and obtain data generated by the Tensile tests (ASTM D3039 / D3039M-08), Flexural (ASTM D7264 / D7264M-07), and Impact (ASTM D5628-10, FE geometry), and thus treat them under parametric assumptions developing a reliable analysis. Once the data was established, it was analyzed by means of the design of mixtures; from which, the significance of the p - value located in the mixture regression table was verified, which was inferred for the generation of the optimization of the responses of the mixtures using the minitab software. In experimental work it was possible to establish the volumetric fractions that generated the best mechanical properties of the mixture; fiberglass 0.261 percent, abaca fiber 0.003 percent, cabuya fiber 0.036 percent and epoxy matrix 0.7 percent, fulfilling the foundation of a mixture of always being equal to one.