Análisis estadístico con metodología de superficies de respuesta para la optimización de las propiedades mecánicas a tracción, flexión e impacto del material híbrido de matriz epóxica, reforzada con fibra de vidrio y abacá

Abstract

In the present experimental work, the analysis of the mechanical properties of the hybrid composite material was carried out, which is reinforced by natural abaca fibers arranged in a flat weave and fiberglass in a thermostable epoxy resin polymer matrix This material was vacuum molded and subsequently subjected to a CO2 laser cut. In the work, a Response Surface Methodology MSR with a Box-Behnken design is proposed which establishes that the minimum of input factors to consider is three and for each factor three levels, which are: Orientation of the tissue of natural fiber: 0, 45, 90 sexagesimal degrees, Fiberglass thickness: 0, 1, 2 mm, and the Curing temperature: 20, 50, 80 degrees Celsius, With this configuration, the design suggests a specific number of treatments with different configurations of factors and levels, from which data will be obtained after the execution of the destructive tests, data that will be validated with the fulfillment of parametric assumptions, thus guaranteeing high reliability throughout the statistical analysis process, consequently the variability ANOVA of the data provided by the MSR design was examined, specifying the significant effects and their incidence on the mechanical properties, later the analysis is complemented with the optimization of each mechanical property analyzed through the desirability function. The results of this investigation determined that the optimal configuration of the factors to take advantage of the mechanical properties is: Orientation of the natural fiber 0 degrees, Thickness of fiberglass 0.76 mm and a Curing temperature of 42.42 degrees Celsius, the regression model of the MSR design explains up to 96,69 per cent the variability of the properties, with an Overall Desirability value of 0,7931.