Ingeniería Mecánica

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Subject: search.filters.subject.FIBRA DE CABUYA

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Now showing 1 - 6 of 6
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    Optimización (Doe-Mezclas) del material híbrido con refuerzos de fibra de abacá, fibra de cabuya y fibra de vidrio de matriz de resina poliéster y su incidencia sobre las propiedades mecánicas a flexión, tracción e impacto
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2020-08) Chiluiza Toapanta, William Patricio; Paredes Salinas, Juan Gilberto
    It posed develop this investigation with the purpose of avoid ignorance in the design of Experiments with mixtures, this is applied to the Mechanical Engineering in the field of composite materials to be able optimize and determinate the best characteristics of the material. The method applied is the design of experiments with mixtures (DOE) the compound of fiberglass, Abaca and Cabuya with the matrix resin polyester applied for the simplexlattice design to determine the optimum mix. It determined a total of ten treatments, and each one forms the one hundred percent of the compound is formed, of which were made 150 specimens to tensile, flexion and impact test with the application of the standards of the ASTM 3039, ASTM 7264 and ASTM 5628 respectively. The results were analyzed to comply the assumptions of normality, equality of variance and waste independence otherwise the data were transformed to adjust the data to BoxCox. The previously analyzed data is passed to Minitab to optimize and determine the best volumetric fraction, finding a percentage of 20.07 for fiberglass, while natural fibers have a percentage of 4.85 percent for Abaca and Cabuya fiber of 5.08 percent. In addition, with the 70 percent Polyester Resin as constant this completes 100 percent of the material composite mix. With this combination it gets better mechanical properties to Traction, Flexion and Impact.
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    Optimización (Doe-Mezclas) del material híbrido con refuerzos de fibra de abacá, fibra de cabuya y fibra de vidrio de matriz de resina epóxica y su incidencia sobre las propiedades mecánicas a flexión, tracción e impacto
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2020-08) Torres Mesias, David Esteban; Paredes Salinas, Juan Gilberto
    The following experimental work was aimed at finding new combinations of composite materials conformed of fiberglass (VF), abaca fiber (FA) and cabuya fiber (FC) with epoxy matrix. For this it was used different volumetric mixtures of reinforcements, the same ones that were considered as input parameters in the statistical analysis of mixtures to optimize the mechanical properties of the results of the different treatments. Specimens were made by compression stratification to then test them and obtain data generated by the Tensile tests (ASTM D3039 / D3039M-08), Flexural (ASTM D7264 / D7264M-07), and Impact (ASTM D5628-10, FE geometry), and thus treat them under parametric assumptions developing a reliable analysis. Once the data was established, it was analyzed by means of the design of mixtures; from which, the significance of the p - value located in the mixture regression table was verified, which was inferred for the generation of the optimization of the responses of the mixtures using the minitab software. In experimental work it was possible to establish the volumetric fractions that generated the best mechanical properties of the mixture; fiberglass 0.261 percent, abaca fiber 0.003 percent, cabuya fiber 0.036 percent and epoxy matrix 0.7 percent, fulfilling the foundation of a mixture of always being equal to one.
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    Caracterización mecánica del material compuesto de matriz elastomérica reforzado con fibra de cabuya para determinar las propiedades mecánicas en aplicaciones industriales
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2019) Machado Machado, Alvaro Fernando; Paredes Salinas, Juan Gilberto
    The study was conducted out in order to generate technological and scientific benefits to the conformation of new composite materials that have been considered high growth and demand in the global market, considering lighter materials and low manufacturing cost that have equal or superior mechanical and physical properties that will replace the materials that have traditionally been presented in the industry. The experimental work was perform the mechanical characterization of latex matrix composite material reinforced cabuya short fiber with random with random orientation and volumetric fractions of 20% latex-80% fiber of cabuya, 30% latex-70% fiber of cabuya, 45 % latex-55% fiber of cabuya,since compression molds and manual stratification were used for the same. Of the essays carried out, the group of specimens that exhibit the best results in their mechanical properties through the tests under the UNE standard. (UNE - ISO 37, UNE - ISO 7743, UNE - ISO 48). With the analyzes developed by means of the statistical methodology based on the general complete factorial design and the function of desirability, it was determined that the best mechanical characteristics of the composite material to take advantage of, It was composed of fiber length of 1cm and volumetric fraction of 20% Latex - 80% Cabuya, obtaining results for tensile stress of 10,592 MPa, modulus of elasticity of 9,986 MPa and shore hardness D 48,667.
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    Estudio de los parámetros de taladrado de un composite de matriz poliéster con refuerzo híbrido de fibra de vidrio más fibra de cabuya y su incidencia en las características de acabado superficial.
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2018) Moya Moya, Edwin Rolando; Vaca Ortega, Wilson Henry
    The objective of this experimental work is to study the behavior of the composite material or composite of polyester matrix with hybrid reinforcement of fiberglass and fiber of cabuya of the parameters of the drilling operation, as it is a material previously developed with applications in bodyworks It is vital to know how the aforementioned material performs in operations previous to assembly. The input variables were the spindle speed (Vc) (1000, 2000 and 3000 rpm) and the feed speed (a) (100, 200 and 300 mm / min), and three types of drill bits were used with 8.5 mm diameter (HSS drill, special kevlar carbide drill bit and diamond tip coated drill bit). The delamination factor (Fd), mean roughness (Ra) and the microscopy of the perforation wall were considered as output variables. Subsequently, the Factorial Model 32 was used in the design and analysis of the experimentation. The best roughness (3,235 um) and output delamination factor (1,273) were obtained with the special carbide kevlar bit with Vc = 1000 rpm and a = 100 mm / min. While the best input delamination factor was obtained with the same dril but Vc = 3000 rpm and a= 200 mm / min.
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    Caracterización mecánica y numérica del material híbrido de matriz epoxi reforzada con tejido plano de fibra vegetal (algodón) y fibra natural (fibra de cabuya)
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2017) Pacha Guashco, Segundo Santiago; Paredes Salinas, Juan Gilberto
    The experimental work was based on the mechanical characterization of the hybrid matrix material of reinforced epoxy resin with layers of flat tissue between the fibers of cotton and fiber of cabuya with different orientations and different volumetric fractions, the study arose because at the present time the engineering of Materials presents great benefits for the technological and scientific development, which allowed to establish study of new materials with equal or better mechanical properties of the traditional materials that are used in the industry, and in this way replace the usual materials with new materials with the advantages In the weight and cost, with the group of specimens with better mechanical tensile characteristics was carried out a simulation by the method of finite elements using a software the same that was validated with real test and the percentage of error that existed between the results Obtained. The tests were performed under standards (traction-ASTM D3039, flexion-ASTM D 7264 impact-ASTM D5628) in this way was established the group of specimens with better mechanical properties of the cases studied. With the data of the real test and the corresponding analyzes, the material with better mechanical properties was established when subjected to the tests of tensile, flexion and impact was case 1 and case 2, case 1 conformed of 75% of epoxy resin as Matrix, as reinforcements 3 layers of flat tissue between the cotton fibers with the amount of 7.50% in angle of 90 ° and the fiber of cabuya with 17.50% in angle of 0 ° while the case 2 conformed of 70% Of epoxy resin as a matrix, as reinforcement 3 layers of flat tissue between the cotton fibers with the amount 7.50% in angle of 90 ° and the fiber of cabuya with 22.50% in angle of 0 °, the stratification of all the Specimens was compressed.
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    Estudio del comportamiento a fatiga mecánica por flexión de materiales compuestos con fibra de cabuya (30%) y matriz poliéster (70%) para determinar el diagrama S-N
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2014-12) Carrillo Ramírez, Diego Armando; Guamanquispe Toasa, Jorge Patricio
    Para la elaboración de este proyecto se analizó las propiedades mecánicas como el comportamiento de la vida a fatiga mecánica por flexión para determinar el diagrama S- N. y se determinó el proceso de obtención de las probetas para el ensayo a fatiga mecánica por flexión, la misma que fue mediante la conformación por molde de compresión, las probetas fueron preparados según la norma ASTM D671, la cual especifica los especímenes usados en las pruebas de fatiga axiales, Se realizó el análisis de la selección del tipo de fibra de cabuya, la misma que fue la fibra larga, debido a que la probeta con fibra larga soporta un mayor esfuerzo en comparación con la probeta de fibra corta dispersa. Se pudo identificar que la temperatura influye directamente en la resistencia a fatiga por flexión. Se determinó mediante la regresión una relación matemática del esfuerzo en función del número de ciclos. En el método de ensayo fue utilizada la máquina de cantiléver con probetas estandarizadas empotradas en los extremos uno fijo y otro móvil con una frecuencia de 30 Hz. Con espesor de 8 mm, sobre los cuales generaron deformaciones y según la deflexión que se le aplicaba el esfuerzo iba variando, mediante un contador electrónico se determinó el número de ciclos hasta la falla y así poder tener la información necesaria para generar la curva mencionada anteriormente. Y así tener ventajas favorables en los aspectos económicos y ambientales.