Maximizing the Fatigue Crack Response in Surface Eddy Current Inspections of Aircraft Structures
In-service detection of fatigue cracking in metallic aerospace structures relies on capable and efficient eddy current inspection procedures. For best results, inspections with surface scanning eddy current techniques are following rigorous procedures that indicate the instrument settings, probe type and configuration. Parametric numerical simulations are representing great tools for optimizing these types of inspections, can considerably decrease the resources dedicated to procedure development and enhance the visual interpretation of the scans. In this study, the crack length with respect to the coil diameter, the crack orientation along the scanning direction, as well as the crack depth are investigated in order to observe the optimal eddy current inspection arrangement. Through limited empirical investigations, agreement between experimental findings and COMSOL Multiphysics® software simulations is sought.
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