此方法将埋在无穷大弹性介质中裂纹，模拟为连续分布的位错环。
The method simulates the crack hiding in infinitely large elastic media as dislocation loop in continuous distribution.
通过把半空间的边界模拟成一个包含在无穷大弹性介质中大裂纹，此法能很好的处理具有任意表面形状的表面裂纹。
This method simulates the boundary in half-space into a large crack containing in an infinitely great elastic medium, by which the surface crack in arbitrary shape can be well-treated.
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