Abstract
Destructive and non-destructive tests were carried out on three-fibre-reinforced plastic composites-glass, carbon and Kevlar reinforced epoxy-under hygrothermal exposure. In all cases good correlation was found between the dispersion of ultrasonic attenuation data (measured by its coefficient of variation) and corresponding average values of strength and attenuation. Accordingly, dispersion may serve as a reliable parameter in non-destructive evaluation for detection and follow-up of hygrothermal degradation in fibre-reinforced laminates.
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