Optimization of Ultrasonic Guided Wave Detection for High Strength Bolt Using Time Gain Curve and Establishment of the Evaluation System

This paper studies the corresponding relationship between the acoustic response and the artificial reflector of the contrast test block in the phased array test of high-strength bolts, and establishes the TCG curve (compensation curve) of high-strength bolts. By doing so, this paper is to provide relevant reference for the qualitative and quantitative detection of defects, and reduce the detection error. Then this paper detects the quality status of high-strength bolts with the TCG-calibrated detection equipment and calculates the remaining area of the bolts based on the defect echo height. By establishing the relationship between the remaining effective area of high-strength bolts and the effective bearing capacity, this paper establishes a quality evaluation system to provide a strong reference for later quality evaluation of the high-strength bolts with detection equipment by the inspectors on the site.