The Correlation between Acoustic and Mechanical Properties of GFRP Pipes Exposed to Irradiation and Natural Aging

By choosing oilfield as the experimental site,both the irradiation accelerated aging test and the natural aging test of commonly used FRP pipes were carried out. The circumferential tensile properties and shear mechanical properties of FRP pipes were tested. The acoustic parameters of pipes in different test circles were measured by means of lead breaking method combined with acoustic emission equipment, then the mechanical properties and acoustic properties of FRP pipes under natural environment and irradiation accelerated aging are obtained, and the acoustic-mechanical correlation degree was calculated by using grey relational analysis. The results show that the correlation degree between circumferential tensile mechanical properties and the broken lead signal velocity was more than 0.7.