Ingeniería Civil y Mecánica

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Subject: search.filters.subject.FIBRA DE PLÁTANO

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    Influencia de la exposición a la intemperie en la resistencia a la tracción, flexión e impacto de dos materiales compuestos de matriz poliéster reforzados con fibra de abacá y plátano
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2020-09) Francisco Javier, Oquendo Lazo; Pérez Salinas, Cristian Fabián
    The present experimental work has the determination of analysis the influence of outdoor exposure under ASTM D1435-99 (maximum and minimum temperature, relative humidity, average rainfall and UV radiation), time (zero to six months) angle of exposure (45 degrees) and type of fiber (abaca and banana), in the behavior of the mechanical properties of composite materials. By means of the elaboration of two composite materials made with a polyester matrix and abaca fiber and another of a polyester matrix and banana fiber, the probes with the following dimensions (length, width and thickness) are made for the tensile test 250x25 x4 mm under ASTM D3039-2017, bending specimens 160x13x4 mm under ASTM D7264 and 80x10x4 mm charpy impact specimens under NTE INEN-ISO 179-2 . The first test was carried out at the beginning of the study and the second after six months, the data of the climatological variations and the variations of the weights of the specimens were also recorded. With the help of the data obtained, it was possible to verify that there are variations in the mechanical properties of both materials in the tensile, flexural and impact tests. The results of the study are presented through a statistical and graphic analysis carried out in the experimental work.
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    Análisis de la influencia de las pruebas tecnológicas sobre las propiedades mecánicas de compuestos de resina polimérica reforzado con fibras naturales del Ecuador bajo norma ASTM
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Mecánica Mención Diseño, 2019) Salán Guevara, Luis Geovanny; Analuiza Maiza, Oscar Iván
    This document responds to an investigative work, against the lack of knowledge of the degree of degradation of composites in the open air, for this purpose the study of the influence of UV radiation and humidity, considered as technological tests, on the mechanical properties of tensile and flexion in two types of composite materials, one with a matrix of polyester resin and reinforcement of cabuya fiber and the other with the same matrix of the previous one with banana fiber reinforcement, under ASTM regulations. In order to determine the percentage of humidity and UV affectation in the aforementioned composite materials, by comparing their properties and determining which one offers better anti-degrading benefits to technological tests, tensile and flexural tests were carried out in the pre and post phases exposure to them. From the experimental treatment of the data obtained, conclusions are established that determine that the composite with better characteristics to resist technological tests is one that uses banana reinforcement. Subsequently, it was validated its use within the automotive industry - body supported by the analysis of finite elements performed by the specialized software intermediary, determining that its ideal application is for internal cover for bus roofs.