Influencia de la exposición a la intemperie en la resistencia a la tracción, flexión e impacto de dos materiales compuestos de matriz poliéster reforzados con fibra de abacá y plátano

Abstract

The present experimental work has the determination of analysis the influence of outdoor exposure under ASTM D1435-99 (maximum and minimum temperature, relative humidity, average rainfall and UV radiation), time (zero to six months) angle of exposure (45 degrees) and type of fiber (abaca and banana), in the behavior of the mechanical properties of composite materials. By means of the elaboration of two composite materials made with a polyester matrix and abaca fiber and another of a polyester matrix and banana fiber, the probes with the following dimensions (length, width and thickness) are made for the tensile test 250x25 x4 mm under ASTM D3039-2017, bending specimens 160x13x4 mm under ASTM D7264 and 80x10x4 mm charpy impact specimens under NTE INEN-ISO 179-2 . The first test was carried out at the beginning of the study and the second after six months, the data of the climatological variations and the variations of the weights of the specimens were also recorded. With the help of the data obtained, it was possible to verify that there are variations in the mechanical properties of both materials in the tensile, flexural and impact tests. The results of the study are presented through a statistical and graphic analysis carried out in the experimental work.