1 Introduction
2 Computation of the stress intensity factor
3 Numerical simulation of stress intensity factors of welded joints under prior corrosion and complex stress fields
Different pits | Pit depth d
| Pit width w
| Pit radius R
|
---|---|---|---|
P0 | 0.0 | 0.0 | 0.0 |
P1 | 1.0 | 2.0 | 1.0 |
P2 | 0.5 | 2.6 | 2.0 |
P3 | 1.0 | 3.5 | 2.0 |
P4 | 2.0 | 4.0 | 2.0 |
4 Sensitivity analysis of stress intensity factors for welded joints under prior corrosion and complex stress fields
4.1 Effect of pit size
Position of crack |
a/c
|
R = 1.0 mm, d = 1.0 mm |
R = 2.0 mm, d = 1.0 mm | ||||
---|---|---|---|---|---|---|---|
K
I
|
K
II
|
K
III
|
K
I
|
K
II
|
K
III
| ||
The deepest point | 0.4 | 282.79 | 73.33 | −19.76 | 290.33 | 71.87 | −19.19 |
0.6 | 264.29 | 73.68 | −20.36 | 272.16 | 72.44 | −19.86 | |
0.8 | 244.52 | 73.23 | −20.58 | 252.52 | 72.24 | −20.19 | |
1.0 | 225.76 | 71.35 | −20.17 | 233.59 | 70.58 | −19.86 | |
The surface point | 0.4 | 200.14 | 0.58 | −1.15 | 192.97 | 0.20 | −1.21 |
0.6 | 226.30 | −4.44 | −5.07 | 224.73 | −4.21 | −4.88 | |
0.8 | 242.06 | −10.21 | −9.65 | 242.14 | −9.79 | −9.45 | |
1.0 | 250.05 | −13.52 | −14.50 | 251.49 | −13.34 | −14.23 |