Ultrasonic Guided Wave Testing Method of Gun Barrel Crack Defects Based on L (0, 2) Mode

Current detection means are faced with the single test parameters and are unable to detect the internal hidden defects; also, the point detection method adopted is of a low detection efficiency. In this paper, with the establishment of the three-dimensional model of barrel defects through the finite element simulation and the adoption of the line detection method based on the L (0, 2) mode guided wave, the quantitative relationship between the axial and circumferential size of crack defects and the echo reflection coefficient could be drawn, and a kind of nondestructive testing method of cannon gun tube crack defects based on ultrasonic guided wave will be put forward. Simulation experiments show that this method can realize high, quantitative detection of cannon gun tube crack defects.