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从金属板表面的疲劳裂纹两侧引入一恒稳电流即可得一电流场。通过求解这一电流场的分布函数,得出了裂纹深度和表面电位间的计算公式。该方法消除了金属板电导率和厚度的影响。
Introducing a constant current from both sides of the fatigue crack on the surface of the metal plate gives a current field. By solving the distribution function of current field, the calculation formula between the crack depth and the surface potential is obtained. This method eliminates the effects of sheet metal conductivity and thickness.