For single edge notched tension specimens and cracked pipelines which have the same crack-depth, not only the tendency of their J-A2 and a/W-A2 curves is in good agreement but the A2 values are close.

• 具有相同裂纹深度的单边缺口拉伸试件与内压管道的J-A2和a/W-A2曲线相关性较好。