首先介绍了直流电位法——裂纹扩展片检测裂纹的方法和原理。
The principle and method for testing surface crack through direct current potential difference are introduced.
在单一裂纹的情况下，出现可检测泄漏的裂纹尺寸和发生失稳扩展的裂纹尺寸取自有关文献。
For single crack situation, the crack size with detectable leak and the critical crack size with unstable propagation are cited from literature.
通过短裂纹群模拟及像素合并处理方式，在进行低分辨率CT图像的演化分析时，检测到短裂纹扩展引起的异常。
Short cracks were simulated and pixels were merged, evolvements of low resolution CT images were analyzed, abnormity induced by propagation of cracks was detected.
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