The technique of measurement of growth, rate of fatigue short crack with indirect KC (IDC) potential system and AC potential system was investigated.

木文研究了间接直流电位法（IDC法）和交流电位法（AC法）用于监测疲劳短裂纹扩展速率的有关技术问题。

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As compared with the experimental life it shows that the predicting ability based on the growth characteristics of short fatigue crack was improved obviously.

预测和实测寿命对比表明，基于短裂纹扩展特性的预测能力有显著改善。

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