Thermomechanical Behavior of Continuous Glass Fiber-reinforced Polyamide Composite Laminates

摘要

E-glass/polyamide laminates were fabricated using a hot press and the effects oftemperature on static tensile behavior was studied both below and above the glasstransition temperature of the material. The glass transition temperature wasdetermined using DMA. Uniaxial tensile tests were conducted on [0]8, [90]8, [02/902]sand [04,904]s laminates at room temperature, as well as at multiple temperatures aboveand below the glass transition temperature. Finally, the Young’s modulus andstrength of the specimens were evaluated versus temperature, fractography wasperformed on the fractured [0]8 samples and the effect of temperature on failuremodes was investigated. [0]8 and [90]8 laminates displayed three reduction stages inmodulus and strength versus temperature where the largest reduction was in glasstransition region. However, [02/902]s and [04/904]s laminates displayed the largestreduction before the glass transition temperature. These experimental findings werecompared with the rule of mixtures and classical lamination theory.