The stress intensity factors (SIFs) for pipes containing semi-elliptical surface cracks with large aspect ratios were calculated by finite-element analysis (FEA). The cracks were circumferential and axial surface cracks inside the pipes. The parameters of the SIFs are crack aspect ratio, crack depth, and the ratio of pipe radius to wall thickness. In comparing SIFs for plates and pipes, it can be clarified that SIFs for both plates and thin pipes with t/Ri ≤ 1/10 are almost the same, and the SIFs for plates can be used as a substitute for pipes with t/Ri ≤ 1/10, where t is the pipe wall thickness, and Ri is the inner radius of the pipe. This means that it is not necessary to provide SIF solutions for pipes with t/Ri ≤ 1/10, and it is suggested that the number of tables for influence coefficient values for pipes can be significantly reduced.

References

References
1.
ASME
,
2015
, “
ASME B&PV Code Section XI: Rules for Inservice Inspection of Nuclear Power Plant Components
,” American Society of Mechanical Engineers, New York.
2.
JSME
,
2012
, “
Rules on Fitness-for-Service for Nuclear Power Plants
,” The Japan Society of Mechanical Engineers, Tokyo, Japan, Standard No. JSME S NA1-2012.
3.
API
,
2007
, “
Recommended Practice for Fitness-for-Service
,” American Petroleum Institute, Washington, DC, Standard No. API 579-1/ASME FFS-1.
4.
Marie
,
S.
,
Chapuliot
,
S.
,
Kayser
,
Y.
,
Lacire
,
M. H.
,
Drubay
,
B.
,
Barthelet
,
B.
,
Le Delliou
,
P.
,
Rougier
,
V.
,
Naudin
,
C.
,
Gilles
,
P.
, and
Triay
,
M.
,
2007
, “
French RSE-M and RCC-MR Code Appendices for Flaw Analysis: Presentation of the Fracture Parameters Calculation—Part III: Cracked Pipes
,”
Int. J. Pressure Vessels Piping
,
84
(
10–11
), pp.
614
658
.
5.
Malekian
,
C.
,
Wyart
,
E.
,
Savelsberg
,
M.
,
Teughels
,
A.
,
Fouquet
,
P. E.
,
Minjauw
,
N.
, and
Wendling
,
A.
,
2009
, “
Stress Intensity Factors for Semi-Elliptical Surface Cracks With Flaw Aspect Ratio Beyond the ASME XI Limit
,”
ASME
Paper No. PVP2009-77917.
6.
Iwamatsu
,
F.
,
Miyazaki
,
K.
, and
Shiratori
,
M.
,
2011
, “
Development of Evaluation Method of Stress Intensity Factor and Fatigue Crack Growth Behavior of Surface Crack Under Arbitrarily Stress Distribution by Using Influence Function Method
,”
Trans. Jpn. Soc. Mech. Eng., Ser. A
,
77
(
782
), pp.
1613
1624
(in Japanese).
7.
Ochi
,
M.
,
Hojo
,
K.
,
Ogawa
,
K.
, and
Ogawa
,
N.
,
2009
, “
Simplified Stress Intensity Factor Equation for SCC Propagation in the Pipe Welds (Step 2)
,”
ASME
Paper No. PVP2009-78001.
8.
Li
,
Y.
,
Hasegawa
,
K.
,
Katsumata
,
G.
,
Osakabe
,
K.
, and
Okada
,
H.
,
2015
, “
Development of Stress Intensity Factors for Surface Cracks With Large Aspect Ratio in Plates
,”
ASME J. Pressure Vessel Technol.
,
137
(
5
), p.
051207
.
9.
Li
,
Y.
,
Doi
,
H.
,
Hasegawa
,
K.
,
Osakabe
,
K.
, and
Okada
,
H.
,
2013
, “
Stress Intensity Factor for Cracks With Large Aspect Ratio in Cylinder
,”
ASME
Paper No. PVP2013-97665.
You do not currently have access to this content.