Avaliação das propriedades mecânicas de um painel - sanduíche de matriz poliéster com reforço de fibra de vidro e com núcleo de espuma de PVC sob flexão

Abstract

The development of composite materials is one of the most important advances in the history of engineering. Well, this class of materials combines the best properties of the materials that constitute them to obtain unique mechanical properties. With that in mind, the present study sought to characterize sandwich panels and evaluate their constituents. Two different configurations of the sandwich structure were analyzed and this difference is due to the variation in the number of layers in the reinforcements. The constituents of the structure are bidirectional fiberglass fabric, polyester matrix and a PVC foam core. The polyester resin that makes up the polymeric matrix, the fiberglass laminate that integrates the reinforcement and the PVC foam that is used in the core were also analyzed separately. The composites were manufactured by the manual lamination method and cured at room temperature for 6 hours. For the tests, the specimens of the sandwich structures were constructed in accordance with the ASTM C393-00 standard, the fiberglass laminates according to the ASTM D 7264/D 7264 M standard and the polyester resin specimens according to the ASTM D 790 standard. -17. The bending test showed that the variation in the number of layers in the reinforcements of the sandwich structure, generate impacts on the flexural rigidity of the panel, on the stresses acting on the faces and on the maximum deformation of the structure.