Ingeniería Civil y Mecánica

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Author: search.filters.author.Guamani Saquinga, Marisol BelénSubject: search.filters.subject.RADIACIÓN

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    Análisis de la influencia de los rayos UV en la resistencia a la tracción del compuesto de matriz polimérica reforzada con fibra de guadua
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2020) Guamani Saquinga, Marisol Belén; Pérez Salinas, Cristian Fabián
    In the present experimental work was analyzed the influence of UV rays on the tensile stress of the polymer matrix composite material, through a mechanical test where it was determined that guadua fiber has good mechanical properties. It is similar the behavior of a fiber synthetic, so this fiber can replace it. The great abundance, it was facilitated to obtain and process the fibrous material. The composite material has as a matrix the polyester and epoxy resin while the reinforcement is considered guadua fiber, which It should be woven with an orientation of 0 degrees at the time of being used as reinforcement and stacking layers. As the way to improve the mechanical properties. Thense, the Guadua fiber reinforced polymer matrix composite material has a volumetric fraction of 70 percent as matrix and 30 percent as reinforcement by hand lay-up and cured to the environment for 720 hours at room temperature. The analysis of the tensile strength behavior of the composite material by ASTM D3039 regulations was performed when subjected to a UV test by ISO 4892 for 50 hours and 250 hours of exposure in an artificial aging chamber with xenon arc. Also, the tensile test was performed with 30 specimens classified by resin and epoxy matrix at 0, 50 and 250 hours of exposure. When the data is obtained, the statistical analysis is carried out using the Minitab software allows an statistic analysis of the data. Then it was determined that the maximum tensile stress of 84.63 MPa, modulus of elasticity of 1363.03 MPa and elongation of 6.21 percent with polyester resin matrix and a the maximun resistance of 71.79 MPa, modulus elasticity of 1518.47 MPa and elongation of 4.73 percent with epoxy resin matrix. And the use of the desirability function it was determined that the best combination when the material has a polyester matrix exposed to 250 hours of UV rays. It is demonstrating the better behavior with these characteristics. It is an economical resin to provide the rigidity and resistance to the composite material and where exposure to UV rays improves the mechanical property.