Browsing by Author "Carranza Calero, Diego Mauricio"

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    Evaluación de vulnerabilidad sísmica de edificaciones de estructuras metálicas en la parroquia Santa Rosa zona 2, Ambato, Ecuador: propuesta de reforzamiento estructural de una edificación representativa
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2023-03) Carranza Calero, Diego Mauricio; Caiza Sánchez, Pablo Enrique
    Seismic vulnerability is a magnitude that allows quantifying structural damage, failure modes and resistant capacity under the action of an earthquake, which is based on the characteristics of the structure. The present work was framed in the vulnerability analysis of metallic structures of the Santa Rosa parish, Zone 2, which has a high level of seismic hazard due to its location and proximity to several geological faults. It was found that most of the metal structure buildings analyzed present a high vulnerability index that indicates that they would suffer great damage in the event of an earthquake. The evaluation criteria used were based on three methodologies: NEC 15, FEMA P-154 and FUNVISIS: perform a more exhaustive analysis, draw vulnerability and seismic risk maps and identify a representative building to perform a detailed analysis and propose a reinforcement proposal, in this building three types of analysis were performed: static, spectral modal and Pushover to identify the critical points of the structure that should be reinforced.
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    Evaluación del desgaste de las herramientas de corte y acabado superficial en el torneado del acero inoxidable AISI 304 mediante lubricación hibrida CO2 + NANO TiO2
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2020-08) Mayorga Ases, Leticia Abigail; Carranza Calero, Diego Mauricio; Núñez Núñez, Diego Fernando
    The present research focused on studying the influence of a hybrid lubrication method, which involves the use of cryogenic CO2 and a minimum lubricant quantity (MQL) system combined with titanium dioxide nanoparticles on the surface finish of elements automatically processes of turning, and flank wear of cutting tools, the evaluation was carried out in a finishing process on a conventional lathe, however, the proposed lubrication and cooling method can also be handled on CNC lathes. To analyze the analyzes, tungsten carbide inserts with a single tip radius established at 0.8 mm were used, the machining parameters to be varied were the cutting speed and feed, the recommended values and the maximum values of these will be used. two parameters to establish the experimental combinations, as well as the lubrication method, for half of the combinations it was carried out dry, while for the rest it was made use of the proposed hybrid refrigeration and lubrication system. The hybrid lubrication system comprises the use of liquid and gaseous CO2 combined with a minimum lubricant quantity system that uses a nano fluid composed of a biodegradable vegetable oil mixed with nanoparticles of titanium dioxide at a concentration of 0.5 per cent by weight , the mixture of cryogenic fluid and nano fluid was directed towards the part-tool contact area to counteract friction and lower cutting temperatures. Standard instruments such as a roughness tester capable of recording surface quality values Ra and Rz and a scanning electron microscope that detect and measure the evolution of flank wear of the flanges are used to evaluate the roughness and flank wear in the different parameter combinations. inserts in a precise manner in accordance with ISO 3685.