A comparison between the static and fatigue properties of glass-fiber and carbon-fiber reinforced polyetherimide composites after prolonged aging

摘要

The static and fatigue behavior of two fiber-reinforced composites were characterized after samples were subjected to both natural and accelerated aging.The composites consisted of a thermoplastic matrix (PEI: polyetherimide) reinforced with glass or carbon fabric. Natural aging involved exposing samples to the elements over a period of two years, while accelerated aging was conducted in a saline solution during 200 days. Subsequently, static (tensile and interlaminar shear) and fatigue tests were carried out with the aim of determining the mechanical properties of the materials after exposure. A negligible decrease in the value of these properties was observed, while different behavior was detected depending on the type of aging of the material.