As the crack continues to propagate, the flow of eddy currents in these two parts becomes more obvious, and the maximum eddy current density at the crack tip shows a decreasing trend.
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A Flexible Eddy Current TMR Sensor for Monitoring Internal Fatigue Crack.
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The sentences
As the crack propagates from the left edge of the exciting coils to the right edge, the disturbed eddy current at the crack tip shows an increasing trend.