The strain field around the crack tip is investigated.
裂纹尖端附近的应变场；
Note that these contours do not encompass the crack tip.
注意这些围道，都不包含裂信尖端。
Local cleavage fracture might happen in the front of crack tip.
裂尖前方可能发生形变孪晶，裂纹沿孪晶界扩展。
They also noted "scattering zone" was very near to the crack tip.
它们还表明：“离散区”非常接近裂纹顶端。
The stress field near crack tip is an important factor to effect crack extension.
裂纹缺陷周围的应力变形场是影响裂纹扩展的重要因素。
All holes were positioned at the tip of the crack.
所有的铝孔都位于裂纹的尖端。
Big distortion and stress concentration happened near the tip of crack.
裂纹尖端附近有较大变形，应力集中明显。
Big distortion and stress concentration happened near the tip of crack.
裂纹尖端附近有较大变形，应力集中明显。
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