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本文描述了在计算机控制下,利用柔度技术在疲劳门槛值和裂纹扩展速率试验中,CT试样上自动检测疲劳裂纹长度的方法。对用目测法和COD法所测疲劳裂纹长度的试验结果进行了分析比较,讨论了引起误差的主要原因。
This paper describes a method of automatically detecting the fatigue crack length on CT specimens using the compliance technique under fatigue thresholds and crack growth rates under computer control. The test results of the fatigue crack length measured by visual inspection and COD method are analyzed and compared, and the main causes of the error are discussed.