122 / 352
118
Figure 14: Flaw shape idealization /12/
In the same way multiple interacted flaws could be idealized as one flaw:
Interaction criterion (c
1
<c
2
): s ≤ 2c
1
for a
1
/c
1
or a
2
/c
2
> 1
s = 0for a
1
/c
1
and a
2
/c
2
≤ 1
Interaction criterion: s ≤ (a
1
+a
2
)
Figure 15: Planar flaws interaction rules /12/
6.4. Homogeneous and strength mismatched configuration
If difference is less than 10%, the use of SINTAP procedure for homogeneous
material based on the base plate properties is recommended. In any another case the
strength mismatched configuration should be take in account. Hence, the base material
properties are kept constant, while the weld metal properties vary. This variation is
described by mismatch factor:
YW
YB
M
σ
σ
=
(5)