Ingeniería Mecánica

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    Análisis de la resistencia mecánica de la punta de ala WING TIP-FAIRING ASSY luego de ser reparada con materiales alternativos
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2021-09) Montero Tobanda, Jonathan Wladimir; Arroba Arroba, Cesar Hernán
    This investigation began with an evaluation of damage by visual inspection of all Wing Tip Fairing Assy components. It was necessary to consider the analysis of the codes for the inspection and reparation of aircrafts. For this, visual inspection reports were issued detailing each of the indications detected on the aerodynamic surfaces. Besides, the materials used in the reparation process follow the laminate configuration of the original components; copper, carbon fiber, kevlar, and fiberglass mesh, as well as a matrix of epoxy resin from the AEROPOXY brand. Furthermore, for the foundation of the restoration process, we based on the recommendation given by the manufacturer’s maintenance manuals, specifically in the parameters of step roughing, and conformed to the vacuum of the repair patches. The study of mechanical resistance of the repaired components was achieved with the application of the reflection essay in three points according to the NTE INEN 2047 standard. In addition, it helped to establish the tensile strength values, elasticity modulus, and the percentage elongation of composite materials. The results obtained were evaluated and analyzed based on FAA airworthiness parameters and previous research, these being the references that validate the repair procedure on Wing Tip Fairing Assy composed of alternative materials. Then, the repair process defined by staggered patches in an oval and vacuum shaped configuration is an effective method in the restoration of flight surfaces.
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    Diseño y construcción de una bomba de pistón para acoplarse a las rotobombas de la FICM
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2021-02) Feria Naranjo, Santiago Vinicio; Carrillo Rosero, Carlos Mauricio
    The present technical project is directed in the design, construction and funcionality test of a piston pump, the same that is constituted of a Michell Banki and Pelton turbine, added to these a diaphragm pump. The project was designed with the purpose of obtaining a piston type pump that adapts to the design and technical specifications of rotary pumps in rigorous conditions. In the theoretical and analytical part, the pump was designed with 3 pistons achieving a more uniform discharge, likewise through the operating ranges of each rotary pump such as the output power, rpm, flow and pumping height it was achieved to size and select the elements that make up the pump. The equipment was built with material that absorbs the vibrations such as AA6063 aluminum for the casing, while for the pistons was used 304 stainless steel due to its great resistance to corrosion and temperature changes. At the start-up with each turbine were obtained pumping values represented in graphs of flow vs. height as well as pressure vs. height, in addition in addition a comparison was made between the performance of the piston pump versus the diaphragm pump, which resulted that the piston pump, exceeds a flow difference between 20 to 36 lt / min, besides it was determined that it is 10 percent more efficient, so the piston pump has better characteristics applied to turbines.
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    Elementos finitos de los análisis por el método de contenedores de residuos, para verificar su resistencia mecánica según los ensayos descritos en la norma UNE-en 12574-2, en la empresa ECUAMATRIZ CIA LTDA
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2019) Pomaquero Pinda, Gustavo Genaro; Núñez Núñez, Diego Fernando
    The present experimental work aims to verify the mechanical strength of the containers manufactured by the company ECUAMATRIZ CIA LTDA. using the finite element method, based on the tests described in the UNE EN 12574-2 standard due to the need to check the criteria established by said regulations. Within the tests examined, the following are mentioned: the ballistic impact, nominal load resistance test, lateral impact test, frontal impact, corners, and fatigue analysis due to the elevation of the container, each of them being governed by the specifications within UNE EN 12574-2. Initially, a simulation model is generated by selecting a material model according to the mechanical properties of galvanized steel A 653. By means of the ballistic test deformation profiles with an average of 1.55 mm were obtained, with which the model validation was carried out. simulation obtaining a maximum error of 11% and a minimum of 7%. For the impact test of faces and corners, an inclined surface was used inside the Ecuamatriz facilities according to kinematic calculations, the impact distances were established so that the speeds corresponded to the required in the norm, obtaining a zero deformation for the real test while in the simulation a maximum plastic deformation of 0.06 was obtained in a time of 0.13 s. For the practical part of the elevation test, the dimensions determined by the UNE EN 12574-1 were used, with which, we can verify the variation of the functional dimensions have a maximum error of 1.18%, within the simulation the container resists 1e6 cycles for both cases of study.
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    Estudio de métodos mecánicos para la determinación de la resistencia al desgaste por fricción seca en el agregado del hormigón de pavimento
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Mecánica, 2015-01) Intriago Pilamunga, Juan Jesús; López Villacís, Gonzalo Eduardo
    El presente proyecto analiza distintos métodos comúnmente utilizados para determinar la resistencia al desgaste de los áridos utilizados en la elaboración del hormigón de pavimento. Para esto en primer lugar se busca información referente a cada ensayo y se la organiza en base a parámetros tales como: la normativa utilizada en cada método, tipo de áridos aplicable a cada método (de acuerdo al tamaño), forma de preparación de la muestra para el ensayo, procedimiento para la realización de cada método y cada normativa, tipo de máquina utilizada en cada método, tipo de desgaste producido por cada máquina, tiempo de funcionamiento de cada máquina durante el ensayo, costo aproximado de cada máquina, característica de cada máquina según normativa y empresas que las fabrican, mantenibilidad e intercambiabilidad de partes. De este modo se determinan también las ventajas y desventajas de cada método con respecto a los demás, para después poder realizar una ponderación de los mismos. Posteriormente se utiliza un método ordinal de ponderación para evaluar cada uno de los métodos y establecer cuál de los mismos es el más apropiado conforme a los requerimientos de los laboratorios de la Facultad de Ingeniería Civil y Mecánica de la Universidad Técnica de Ambato; y al mismo tiempo probar la hipótesis previamente planteada. En esta ponderación se evalúan varias características de cada ensayo como: Costo de la máquina utilizada, mantenibilidad de la misma, su tamaño, su peso, precisión de resultados y dispersión de los mismos, facilidad en la preparación de la muestra, tiempo de ensayo, implementación (factibilidad tecnológica) y aspecto ergonómico (nivel de ruido). Finalmente en la etapa de la propuesta se opta por diseñar en función del método, resultado de la ponderación, el medio mecánico (máquina) que cumpla con los requerimientos del ensayo requerido, la normativa apropiada y exigencias de los laboratorios de la Facultad de Ingeniería Civil y Mecánica de la Universidad Técnica de Ambato.