Ingeniería Mecánica

Permanent URI for this collectionhttp://repositorio.uta.edu.ec/handle/123456789/900

Browse

Filters

2021 - 20236

Settings

Subject: search.filters.subject.FIBRA DE CHAMBIRA

Search Results

Now showing 1 - 6 of 6
  • No Thumbnail Available
    Item
    Análisis del proceso de obtención de un material compuesto de matriz epoxi reforzado con fibra natural y sintética mediante transferencia de resina por infusión al vacío (VARTM)
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2023-08) Pichucho Baez, Oscar Augusto; Paredes Salinas, Juan Gilberto
    The generation of new composite materials that present good mechanical characteristics, for different user needs, is important to improve the production characteristics of local and even national businesses. It should also be taken into account that many times, this change must necessarily be friendly to the environment and generate the greatest amount of product, taking advantage of the minimum necessary resources; this maximizes productions and profits. This paper presents the characterization of the process that must be carried out to generate composite material laminates, with different parameterizations, made based on an epoxy resin matrix, reinforced with natural Chambira fibers, in different directions, and synthetic fiber, purely flat fiberglass fabric, through the Vacuum Infusion process, carried out with a vacuum pump. Bearing in mind that there may be variations in the forming process of said material, as well as in certain punctualities of the conforming elements. Subsequently, the acquired properties of each of the cases were verified, through an analysis of the production times, the weights before and after the forming process and a tensile test, made under the parameters of the ASTM D3039 standard, which provides us with the characteristics that must be analyzed of each tested specimen, this in order to verify the acquired qualities, as well as a possible comparison of the uses that the material may have.
  • No Thumbnail Available
    Item
    Efecto de la secuencia de apilamiento sobre las propiedades mecánicas y termomecánicas mediante análisis dinámico mecánico (MDA) del compuesto de matriz epoxi reforzado con fibras natural (Chambira) y sintética
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2023-03) Salazar Garcés, Dennis Patricio; Paredes Salinas, Juan Gilberto
    This project details the effect of the stacking sequence regarding the thermomechanical and mechanical properties of the composite based on natural fiber (chambira) reinforced with synthetic fiber (glass, carbon and kevlar) and epoxy resin. The composite laminates were pure chambira fiber/epoxy, pure synthetic fiber/epoxy, and hybrid chambira fiber/synthetic/epoxy; They were molded by infusion process and subjected to curing and finally CO2 laser cutting. A descriptive statistic was performed, since due to the asymmetry of the cases it is only possible to analyze the incidence of the stacking sequence on the mechanical and thermomechanical properties by means of DMA of the compounds. Once the tests were completed and the results tabulated, using records and graphs, it was possible to observe that there is a clear advantage of the pure carbon fiber composite, since it far exceeds the rest of the compounds in all the tests. For the hybrid compounds, it was observed that there is no marked domain since some compounds behave better than others depending on the tests to which they have been subjected. Regarding the glass transition temperature, it could be corroborated with what is indicated by the manufacturer in the technical data sheet, where it mentions that the temperature at which the epoxy resin crystallizes is 91 degrees Celsius and in the results of the mechanical dynamic analysis carried out, values were obtained. which always hovered around 90 degrees Celsius.
  • No Thumbnail Available
    Item
    Optimización - MSR del material compuesto de matriz epoxi reforzado con fibra natural chambira (Astrocaryum) y sintética (Kevlar) mediante infusión de resina al vacío y su incidencia en las propiedades mecánicas
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2023-02) Moreno Robalino, Jonathan Patricio; Paredes Salinas, Juan Gilberto
    In the following work we will focus on the elaboration and characterization of the search for new hybrid and low weight sandwich materials, using different configurations in the reinforcement stacking. In order to achieve a reduction in weight and facilitate the elaboration, an epoxy resin reinforced with chambira fiber woven with kevlar fiber was used, taking into account the number of layers and positions to be worked, using the vacuum resin infusion method and its impact on the mechanical properties, for the specimens a curing at different temperatures and laser cutting with CO2 was performed. The Box-Behnken design method based on response surfaces was used, which allows the input of three continuous factors with their levels respectively, which are detailed as follows: Fiber Orientation 1 and Orientation 2 between 45, 0 and -45 degrees and curing temperature with 60, 90 and 120 degrees Celsius. At the time of the design, the number of treatments to be carried out was specified and in the mechanical tests of each sample, an analysis of the data was made and organized and validated in order to have their mechanical properties. The tests performed on the specimens yielded several results which helped to determine the most optimal configuration of the layers.
  • No Thumbnail Available
    Item
    Optimización de respuestas múltiples (DOE/MSR) de propiedades mecánicas del material híbrido de matriz epoxi reforzada con fibra sintética (KEVLAR) Y natural (CHAMBIRA)
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2022-03) Amaya Jaya, Liliana Estefanía; Paredes Salinas, Juan Gilberto
    The present experimental investigation began with the elaboration of a hybrid material of epoxy resin matrix and chambira and kevlar fiber reinforcement, based on the optimization of the mechanical properties and through the analysis under the response surface methodology. The composite material was molded using a vacuum stratification method to be cured at different temperatures, after which a laser cutting process was carried out. For the analysis, the factors that intervened directly through the Box-Benken design were taken into account, orientation 1 of -45.45 and 0 degrees, orientation 2 of -45.45 and 0 degrees and temperature of 60, 90 and 120 degrees centigrade, with the exact number of factors, a specific configuration of factors and levels was made, its parametric assumptions executed by the ANOVA variability analysis after the execution of the tests being valid, giving as an optimal result a predicted value of an orientation 1 (-7.727 degrees), orientation 2 (3.18 degrees) and temperature (106 degrees centigrade), presenting a desirability of 0.4887 percent, which allowed reaching highly favorable values for all its properties.
  • No Thumbnail Available
    Item
    Optimización de respuestas múltiples (DOE/MSR) de propiedades mecánicas del material hibrido de matriz epoxi reforzada con fibra sintética (vidrio) y natural (chambira)
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2022-01) Chuquitarco Taco, Santiago Wladimir; Paredes Salinas, Juan Gilberto
    The experimental work was carried out based on analysis of the results of mechanical properties of the hybrid material with reinforcements of chambira fiber and glass with epoxy resin matrix, formed by vacuum stratification, cured in different temperatures and subjected by laser cutting with CO2 of the samples. The use of Response Surface Methodology with Box-Behnken design allowed the entry of three continuous factors with their levels respectively are: Orientation 1, Orientation 2 of the fiber between -45, 0 and 45 degrees and Curing temperature with 60, 90 and 120 degrees Celsius. In the design, the number of treatments to be obtained was specified so that the mechanical tests of each sample were elaborated, the data obtained were organized and validated with the fulfillment of the parametric assumptions having full reliability in analysis of the mechanical properties. With the results obtained, the optimal configuration of the mechanical properties was determined, which are presented in factors with the orientation 1 to 28.68 degrees, orientation 2 to 1.36 degrees and at a curing temperature of 120 degrees Celsius. These values were given by means of the analysis of variance ANOVA the same that has significance and reliability in its data, therefore, the model of the Surface Design DOE / MSR explains up to 99.6 percent of its variability of the properties in that way the global desirability has the value of 0.6373.
  • No Thumbnail Available
    Item
    Optimización bajo metodología de superficie de respuesta (MSR) del material compuesto de matriz epoxi reforzado con fibra de chambira (astrocaryum) y su incidencia en las propiedades mecánicas
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2021-09) Plasencia Tercero, Jhonny Michael; Paredes Salinas, Juan Gilberto
    The experimental research is focused on the mechanical characterization of the epoxy resin composite reinforced with chambira fiber. In the experimental work, the analysis of the mechanical properties of the new composite material was carried out, which was molded by vacuum stratification and later cured at different temperatures, in addition, subjected to CO2 laser cutting. The research raises the analysis of the response surface methodology directed to the BoxBehnken design which establishes three input factors with three levels for each factor: fiber orientation OC1 -45.0, 45 degrees, OC2 -45, 0.45 degree and curing temperature of 60, 90, 120 degrees centigrade. The design suggests a specific number of treatments for the destructive test of the specimens, data that will be validated by fulfilling the parametric assumptions. From the analysis of variance (ANOVA), the adequacy of the model for each mechanical property was corroborated, emphasizing the significant effects and their incidence on the mechanical properties, to complement the analysis, the optimization of each treatment is carried out through the desirability function. The results reveal that the optimal configuration of the composite material where the mechanical properties are used is by combining the OC1 of -35.9 degree; the OC2 of 45 degree and a temperature of 60 degree centigrade, predicted values of desirability with a value of 0.5871, it is also understood that the model explains 96.6 percent of the variability of the properties.