Ingeniería Mecánica

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    Modelo de material para perfiles conformados en frío de sección transversal UV de acero a572, para espesores de 6 mm y 8 mm
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2024-02) Muzo Chico, Danny Alejandro; Córdova Acosta, Christian Alexander; Peña Jordán, Francisco Agustín
    There is a notable deficiency in accurate data and analysis concerning thick-walled structural sections, particularly those of the UV cross-section. There are studies on thin-walled cold-formed steels, there is a gap in structural engineering knowledge due to the lack of studies performed in the thick-walled environment and the lack of material models specifically designed for cold-formed UV cross-sections using A572 steel. The experimental work started using the cold forming process of a structural profile of UV cross section of ASTM A572 gr 50 steel with thicknesses of 6 mm and 8 mm, which by water jet cutting, standardized specimens were extracted to perform tensile, micrographic and hardness tests, which are performed under ASTM E8, ASTM E112, ASTM E18 standards, respectively. Data were collected from each test and their mechanical behavior was analyzed. Several comparisons were made between the results of curved specimens and flat specimens of each thickness, thus identifying the variations in their mechanical properties. The hardness tests indicate the zone of affectation being 1.6t, in addition to the affectation of the cold forming process. As a result, the tests performed yielded data on the microstructural behavior of ASTM A572 steel in the cold forming process, as well as its mechanical properties, which will be useful for the support of technical reports.
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    Caracterización de las propiedades mecánicas del material híbrido utilizando matriz epóxica reforzada con tejido de fibra vegetal de algodón y fibra natural de abacá
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2017) Benavides Salinas, Geovanny Santiago; Paredes Salinas, Juan Gilberto
    This experimental research is based on the characterization of the hybrid material of epoxy matrix reinforced with layers of structured woven of abaca fibers and cotton in different orientations and with varied volumetric fractions, the purpose of the study is to obtain the best characterization of the material containing the best mechanical properties. In this work the stratification process was used for compression to obtain the hybrid material, it was to establish the definitive percentage volumetric fractions of reinforcements, material thickness and number of layers of reinforcement of woven. Of all the characterizations made determined group of specimens that exhibits the best mechanical properties tests standardized under the ASTM standards. (ASTM D3039-00 traction, flexion ASTM D7264-07 and impact ASTM D5628-10). The analysis of three types of trials determined that the hybrid material presented better mechanical properties corresponds to the case 3 which has a volumetric fraction of 75% resin Epoxy (matrix), 18.25% abaca fiber and 6.75 percent cotton (reinforcements).