Ingeniería Mecánica

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Subject: search.filters.subject.ASTROCARYUM

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    Optimización - MSR del material compuesto de matriz epoxi reforzado con fibra natural Chambira (Astrocaryum) y sintética (carbono) 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, 2023-03) Palacios Palacios, Milton Enrique; Paredes Salinas, Juan Gilberto
    Today in the field of Materials Engineering there is a great demand to improve the mechanical properties of new materials that are being designed and thus be able to meet the needs that the user requires. The experimental work was carried out under the (MSR) (Box-Behnken) methodology, which establishes three input factors with three levels for each one, thus allowing to determine the orientation of the fibers and the curing temperature. The values considered were: -45, 0, and 45 degrees and the temperature 60, 90, and 120 degrees Celsius. The conformation of the specimens was carried out by means of a vacuum system by infusion, the same one that allowed to obtain better results in the surface of the material avoiding the porosity, later the curing of the material was carried out at the established temperatures, in addition, it was carried out a laser cut. The results obtained from the tensile, bending and impact tests were tabulated and analyzes were carried out, yielding the following results: that the best combination of fibers to obtain an optimal material should be carried out with orientation1 -10.4545 degrees and orientation2 -37 .2727 degrees; that the curing temperature 120 degrees Celsius and the MSR design regression model explains an overall desirability value of 0.5953.
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    Optimización - MSR del material compuesto de matriz epoxi reforzado con fibra natural Chambira (Astrocaryum) y sintética (vidrio) 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, 2023-03) Tipantasig Pérez, Johnny Israel; Paredes Salinas, Juan Gilberto
    The present experimental work seeks to determine the optimization of the mechanical properties of the compound developed by means of an Epoxy resin matrix (Aeropoxy), reinforced with two layers of natural chambira fiber (Astrocaryum) and a synthetic glass fiber (Fiber Glass HexForce 7788), using the vacuum resin infusion method, subjected to curing of the specimens to finally fragment them through laser cutting. Applying the Response Surfaces Methodology, the Minitab statistical analysis software was used in which the mechanical properties of the composite material were analyzed, using the Box-Behnken design in which we entered 3 input factors with 3 levels each: Orientation 1 (-45.0.45) degrees, Orientation 2 (-45.0.45) degrees and the temperature (60,90,120) degrees Celsius. In the design, the total number of samples to be obtained was indicated and later the respective treatments were carried out to execute the destructive mechanical tests of each case. These results were validated by complying with the parametric assumptions specified in the design. Through the ANOVA analysis of variance, the global analysis was determined with the best combination of the mechanical properties that interact in the process, which gave us values for orientation 1 of 23.18 degrees, orientation 2 of -10.45 degrees and a temperature of 60 degrees Celsius, also in the global optimization a desirability of 0.5173 was obtained.
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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 bajo metodología de superficie de respuesta (MSR) del material compuesto de matriz epoxi reforzado con fibra de chambira (astrocaryum) y su incidencia en las propiedades mecánicas
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2021-09) Plasencia Tercero, Jhonny Michael; Paredes Salinas, Juan Gilberto
    The experimental research is focused on the mechanical characterization of the epoxy resin composite reinforced with chambira fiber. In the experimental work, the analysis of the mechanical properties of the new composite material was carried out, which was molded by vacuum stratification and later cured at different temperatures, in addition, subjected to CO2 laser cutting. The research raises the analysis of the response surface methodology directed to the BoxBehnken design which establishes three input factors with three levels for each factor: fiber orientation OC1 -45.0, 45 degrees, OC2 -45, 0.45 degree and curing temperature of 60, 90, 120 degrees centigrade. The design suggests a specific number of treatments for the destructive test of the specimens, data that will be validated by fulfilling the parametric assumptions. From the analysis of variance (ANOVA), the adequacy of the model for each mechanical property was corroborated, emphasizing the significant effects and their incidence on the mechanical properties, to complement the analysis, the optimization of each treatment is carried out through the desirability function. The results reveal that the optimal configuration of the composite material where the mechanical properties are used is by combining the OC1 of -35.9 degree; the OC2 of 45 degree and a temperature of 60 degree centigrade, predicted values of desirability with a value of 0.5871, it is also understood that the model explains 96.6 percent of the variability of the properties.