info:eu-repo/semantics/bachelorThesis
Influencia de la presión de infiltración del proceso de moldeo por trasferencia de resina, sobre la resistencia a la tracción, de un compuesto de matriz poliéster reforzada con fibra de vidrio
Fecha
2016Autor
Rodriguez D’Angelo, David Alessandro
Saucedo Fernández, Homero
Institución
Resumen
In this work, the effect of the pressure infiltration process of resin transfer molding (RTM), on the maximum tensile strength in laminated polyester matrix reinforced with fiberglass E short and random investigated, the pressure values are evaluated infiltration 30,45,60,75 and 90 psi for the RTM process of an air compressor adapted 2HP power, the laminates obtained by the above processes were 30 * 15 cm length and width and thickness was determined by the thickness of the mold in the case of RTM was approximately 3 mm. The obtained laminates specimens for tensile test were extracted according to ASTM standard D638-01. From the results it was determined that the increase in infiltration pressure in the range of study, increases the maximum tensile strength of the laminates obtained using the RTM process, in the range of 30 to 75 psi, and then present a slight decrease of the property to 90psi, this would depend on the permeability characteristics of the reinforcing layers and the phenomenon we call displacement, and therefore the lack of wetting of the fibers used by the resin. Higher values of tensile strength was reached at 75 psi (128.96 MPa), while the lowest was obtained at 30 psi (90.21MPa). In some cases detachment between fiber and matrix which supports the lack of moisture between components of the obtained compound is evident, it is demonstrated through micrographic evaluation. The results are confirmed by analysis of variance for a confidence level of 95%, the latter concludes that the pressure infiltration resin significantly influence the maximum tensile strength of the laminates of polyester resin and glass fiber obtained by RTM process.