Abstract
Nondestructive evaluation (NDE) is an important methodology for quantifying cracks in engineering structures. In this paper, we propose a dipole model method (DMM) for NDE. The method is used to simulate an alternating magnetic field around a crack on a paramagnetic metal specimen and to estimate the shape and volume of the crack. This method enables faster and simpler evaluation of crack size than the traditional analytical methods. The DMM performance was verified by comparing the simulation results with the experimental results obtained using an AC-type magnetic camera.
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