Failure Assessment for the High-Strength Pipelines with Constant-Depth Circumferential Surface Cracks

Figure 11

Comparison of J-integral estimated by using new elastic and plastic influence functions with FE results for thin-walled pipes under bending having D/t = 100, a/t = 0.2, and θ/π = 0.04: (a) X70; (b) X80; (c) X90.

(a)

(b)

(c)