球型容器接管外拐角表面裂纹疲劳形状扩展数值计算方法

Numerical computational method of fatigue growth of surface crack shape at out-corner of spherical vessel nozzles

运用新型计算机数值计算方法对球型容器接管外拐角表面裂纹疲劳扩展形状和特性作了模拟跟踪研究 ,并与实验进行了比较 .结果表明接管外拐角表面裂纹的疲劳扩展同内拐角有一定的差异 。

Fatigue growth shapes and properties of surface crack at out\|corner of spherical vessel nozzle was studied with a new method——numerical computational method. Both the results of experiments and numerical method indicate the different fatigue feature of out\|corner and in\|corner cracks and the usual postulation of the crack shape has much shortcoming if used to surface flaws at nozzle out\|corner.