Ingeniería Mecánica

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Has files: YesSubject: search.filters.subject.FIBRA DE KEVLAR

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    Optimización - MSR del material compuesto de matriz epoxi reforzado con fibra natural chambira (Astrocaryum) y sintética (Kevlar) mediante infusión de resina al vacío y su incidencia en las propiedades mecánicas
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2023-02) Moreno Robalino, Jonathan Patricio; Paredes Salinas, Juan Gilberto
    In the following work we will focus on the elaboration and characterization of the search for new hybrid and low weight sandwich materials, using different configurations in the reinforcement stacking. In order to achieve a reduction in weight and facilitate the elaboration, an epoxy resin reinforced with chambira fiber woven with kevlar fiber was used, taking into account the number of layers and positions to be worked, using the vacuum resin infusion method and its impact on the mechanical properties, for the specimens a curing at different temperatures and laser cutting with CO2 was performed. The Box-Behnken design method based on response surfaces was used, which allows the input of three continuous factors with their levels respectively, which are detailed as follows: Fiber Orientation 1 and Orientation 2 between 45, 0 and -45 degrees and curing temperature with 60, 90 and 120 degrees Celsius. At the time of the design, the number of treatments to be carried out was specified and in the mechanical tests of each sample, an analysis of the data was made and organized and validated in order to have their mechanical properties. The tests performed on the specimens yielded several results which helped to determine the most optimal configuration of the layers.
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    Optimización de respuestas múltiples (DOE/MSR) de propiedades mecánicas del material híbrido de matriz epoxi reforzada con fibra sintética (KEVLAR) Y natural (CHAMBIRA)
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2022-03) Amaya Jaya, Liliana Estefanía; Paredes Salinas, Juan Gilberto
    The present experimental investigation began with the elaboration of a hybrid material of epoxy resin matrix and chambira and kevlar fiber reinforcement, based on the optimization of the mechanical properties and through the analysis under the response surface methodology. The composite material was molded using a vacuum stratification method to be cured at different temperatures, after which a laser cutting process was carried out. For the analysis, the factors that intervened directly through the Box-Benken design were taken into account, orientation 1 of -45.45 and 0 degrees, orientation 2 of -45.45 and 0 degrees and temperature of 60, 90 and 120 degrees centigrade, with the exact number of factors, a specific configuration of factors and levels was made, its parametric assumptions executed by the ANOVA variability analysis after the execution of the tests being valid, giving as an optimal result a predicted value of an orientation 1 (-7.727 degrees), orientation 2 (3.18 degrees) and temperature (106 degrees centigrade), presenting a desirability of 0.4887 percent, which allowed reaching highly favorable values for all its properties.