Non-destructive Technique of Glass Fiber Reinforced Plastics Influenced of Water Environment Degradation
Details
The glass fiber reinforced plastic (GFRP) with the corrosion resistance properties has been used in water environment as a structure material. Now, a non-destructive method is required in order to verify the decrease of mechanical properties during using GFRP. An ultrasonic detecting method was chosen from some non-destructive methods in the study. Eight kinds of UD-GFRP, which the immersing time was changed in 80±3℃ distilled water, were prepared. The tensile test was carried out to estimate the change of mechanical properties under water environmental degradation. As a result, it become clear that interfacial debonding causing the fall of tensile strength increased and the interfacial debonding became a factor of the source of reflection of an ultrasonic wave.
