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

Figure 8

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 = 0.01: (a) n = 10; (b) n = 15; (c) n = 20.

(a)

(b)

(c)