Feasibility Study of Mutual Inductance-Based Non-Destructive Testing Method Under Varied Dimensions of Hidden Crack

This study delves into the results and discussion of a study employing a ۲D-axisymmetric finite element model to investigate the interaction between coils and an interposed plate sample, with a primary focus on detecting potential defects such as cracks, and assessing parameters including crack dimensions, depth, specimen thickness, and coil specifications. Mesh independency, a crucial aspect of numerical simulations, is explored, emphasizing its significance in achieving accurate and reliable results in various scientific and engineering fields. The research further investigates mutual inductance in a system designed to detect cracks of varying dimensions. It analyzes the impact of parameters, including sheet thickness, crack depth, crack radius, wire radius, air gap, and inner coil radius, on mutual inductance. The results suggest that thicker sheets and smaller cracks make crack detection more challenging, whereas a thinner wire radius enhances system performance. The air gap has minor effects. The study also introduces an improved system design that significantly enhances mutual inductance values, making it a promising method for non-destructive (NDT) testing when design parameters are appropriately considered. These findings contribute to the development of NDT methodologies for various engineering applications.

Keywords:

Non-destructive testing (NDT) , Mutual inductance , Magnetic field , Crack , Sensors