疲劳裂纹电位法测量研究

本文对电位式裂纹测量仪的基本组成原理及性能做了介绍，并在高温疲劳裂纹扩展试验中，使用该仪器与显微镜直接观测法同时测得四组试验数据。对其中三组数据进行线性拟合，拟合出试验中裂纹长度与测得电压之间的关系式，最后用拟合出的关系式对另一组数据反推检验裂纹长度。对比所得结果，测量精度比较令人满意，证明了此电位式裂纹测量仪的可靠性和实用性。

Investigation on an Electric Potential Difference Crack Length Measuring Procedure

This paper introduces the structure and properties of a kind of electric potential difference crack length measuring machine.Four groups of data were obtained in a high temperature fatigue test by this machine and optical microscope.Linear curve fitting was made from three groups of the data.The relationship generated from the curve fitting was used to test the rest group of data.From the comparison with the data gained by machine and by the optical microscope,it has proved the validity and practica- bility...