用CTOA预测弯曲载荷下含周向穿透裂纹及管道的J_R曲线

The Theoretical Predictions of the J_R Curve for the Piping with Circumferential Throngh-wall Crack under Bending Loads

本文用测定裂纹尖端张开角（CTOA）的方法，根据管道的几何参数预测了全尺寸穿透裂纹管试样的JR阻力曲线，并与实验进行了比较。结果表明，实测的JR阻力曲线也与管道试样的几何参数有关。

By measuring the crack tip opening angle (CTOA), the JR curve was predicted for the fullscale piping specimen in terms of geometric parameters of the piping and crack.The predictions were compared with experimental results for pipings of 108mm in outer diameter containing cracks of different sizes. The results showed that the predicted JR curves are also related to the geometric parameters of the piping and crack.