Changes in electrical resistivity due to cracks can be used to predict deterioration of mechanical performance caused by accumulation and growth of microcracks in electrically conductive structural elements. In this article, we utilize high-frequency alternating current to improve sensitivity of measurements through skin depth effects. Models for crack-produced changes in high-frequency alternating current are examined, and a method is proposed to correlate changes in resistivity associated with a crack due to skin depth and reactance effects. Note that only resistive impedance is linked to changes in mechanical properties through cross-property connections.
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