Tomography of wall-thinning defect in plate structure based on guided wave signal acquisition by numerical simulations

The integrity of plate structures in numerous facilities and vehicles is essential for ensuring safety. Guided wave testing is a prominent non-destructive testing (NDT) technique, especially for wide plate or long pipe structures. It can be related to tomography techniques to visualize defect information. One way to obtain data for tomography is through experimentation. However, a numerical approach, such as a computational simulation, could also be a feasible option because it can efficiently handle various defect cases. In this study, a dynamic analysis was performed to acquire the guided wave signal on a plate containing a wall-thinning defect, for which previous studies were insufficient. Acquired signals are compared to each other, and studies have demonstrated that wall-thinning defects can be visualized. This approach to signal data acquisition is expected to enhance the efficiency of data collection in several fields, such as machine learning implementation in NDT.