Ingeniería Mecánica

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    Diseño y construcción de un accesorio externo automotriz bajo el proceso de infusión al vacío con material compuesto de matriz polimérica
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2024-02) Tenorio Cabezas, Vanessa Estefanía; Paredes Salinas, Juan Gilberto
    Actually the application of composite materials for the forming and creation of components or accessories is one of the greatest needs in the industrial field, aiming to reduce the weight and the replacement of metals, preserving or improving the properties of the materials. The progress of the forming processes are mostly manual, causing irreversible failures such as porosity, cracks, air bubbles and more defects, forming less resistant laminates. The Technical Project focused on obtaining the main parameters involved in the vacuum infusion process applied to a laminate with a complex shape, that is, curved, inclined, straight and deep areas. In addition, Tensile-Flexural tests were carried out to check the mechanical properties of the laminate obtained and cured at a temperature of 80 grades Celsius for two hours. The results obtained through the application of the process were compared with other commercial projects that were formed under the same parameters. The technical work showed that for a vacuum infusion process, permeability is one of the parameters that influenced at the time of lamination, using and applying Darcy's Law, for that reason it was important to select the complements (vacuum infusion kit) and it was verified that the orientations of the natural or synthetic fibers should be at 45 grades for greater resistance, but if a laminate with lower residence is desired, the recommended orientation is from 0 to 90 grades.
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    Aplicabilidad de un material compuesto de matriz polimérica reforzado con partículas residuales de cuero en usos industriales
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2017-10) Izurieta Guerrero, Carlos Eduardo; Espín Lagos, Segundo Manuel
    Tanneries through the process of tanning of the animal skin remove certain layers of skin during the process of filing and scraping, product of these processes is obtained fine particulate and coarse leather particulate respectively, this generated particulate become waste, in such a way the idea was born to manufacture a polymeric matrix composite (polyester resin) reinforced with residual particles of leather that is friendly to the environment and intended for industrial uses. For the preparation of the test pieces, different volumetric fractions were used for both fine particulate and coarse leather particulate, by means of the vacuum stratification process, to be tensile, flexural and impact tested by ASTM D3039, ASTM D7264, ASTM D5628, respectively, obtaining the mechanical properties of the material. By means of the tensile, flexure and impact tests, it was obtained that the composite of polyester matrix with thick particulate reinforcement of leather with the volumetric fraction 70% matrix and 30% reinforcement presented the best results, Traction Rupture Effort 5, 5 MPa, Modulus of Elasticity 154.1 MPa, Bending Rupture at 16.58 MPa, Bending Modulus 548.9 MPa, Impact Resistance 1.09 J.