Ingeniería Mecánica

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Subject: search.filters.subject.MÉTODO GRAVIMÉTRICO

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    Caracterización mecánica del material compuesto de matriz poliéster reforzada con fibra natural de totora (Schoenoplectus Californicus) y su posible aplicación en la industria
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2022-03) Pico Vaca, José Luis; Espín Lagos, Segundo Manuel
    This research project was based on defining the mechanical properties through the characterization of the composite material of Polyester resin and natural reed fiber, with a configuration of continuous fiber distributed longitudinally, in addition three different volumetric fractions were established (90 percent matrix10 percent fiber, 80 percent matrix-20 percent reinforcement, 70 percent matrix 30 percent reinforcement) that correspond to the percentage of the matrix and reinforcement respectively, in order to determine the composite material with the best mechanical performance based on its volumetric fraction . The density of the fiber was determined using the gravimetric method, giving us a density of 0.19 grams / cubic centimeter and a manual stratification was also used for the preparation of the test tubes. For the mechanical characterization, three mechanical tests were carried out: traction, bending and impact, these were carried out under the ASTM D3039, ASTM D7464, ASTM D5628 Standards, respectively. Manual stratification was used to make the specimens, in a mold made of ASTM-A36 structural steel. With the data obtained from the tensile, bending and impact tests, it was determined that the composite material with a volumetric fraction of 70 percent of polyester resin polymer matrix and 30 percent of reed fiber reinforcement presents the best mechanical properties with the following values: a maximum tensile stress of 14.41MPa, Modulus of elasticity of 1036.598MPa, Maximum flexural stress of 71.51MPa, Flexural modulus of 10941.27MPa, and Impact energy of 0.23J
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    Caracterización mecánica del material compuesto de matriz poliéster reforzada con cascarilla de arroz para determinar las propiedades mecánicas en aplicaciones industriales
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2017) Lalaleo Galarza, Edisson Fernando; Paredes Salinas, Juan Gilberto
    This research is based on the characterization of matrix composite material reinforced polyester rice hull, different types of stratification (manual-compression) and volume fraction in order to obtain the best material containing optimum mechanical properties were taken. The development of the new material was required to perform different mechanical test, specifically Tensile, Bending, Impact and Fractography; which they were indispensable to determine the parameters for assessing characterization of composite material, type of stratification (manual-compression) and volume fractions. The results show that Type B composite of compression lamination has a tensile strength superior to that of gypsum ceiling. In other words, according to the traction tests the gypsum ceiling can be replaced by the Type B composite. The tensile modulus of compressive stratification Type B composite was 7955 MPa, corresponding to a 65% improvement over that of gypsum ceiling.