In the present work, inelastic dynamic behavior of a pressurized stainless steel elbow is studied under harmonic base excitation with the emphasis on strain accumulation known as ratcheting. Initially, sine sweep test is carried out on the long radius stainless steel (SS 304L) elbow to evaluate the free vibration characteristics. Then, incremental harmonic base excitation with the first resonant frequency is applied to the elbow till failure and the resulting response is studied. The tested elbow is analyzed using a simplified method and the simulated ratcheting strain is compared with experimental results. The effect of thickness variation in the elbow on strain accumulation is also studied. Levels of base excitation corresponding to different failure criteria are evaluated and the details are provided in the paper.

References

References
1.
EPRI,
1994
, “Piping and Fitting Dynamic Reliability Program,” Component Tests Report, Electric Power Research Institute, Palo Alto, CA, Report No.
EPRI-TR--102792-V3
.
2.
Gerry
,
S. C.
,
1997
, “
Experimental Data on Seismic Response of Piping—Part 3: PVP, Seismic Engineering
,” ASME Pressure Vessels and Piping Conference, Orlando, FL, July 27–31, pp.
163
171
.
3.
Dang
,
V. K.
, and
Moumni
,
Z.
,
2000
, “
Evaluation of Fatigue-Ratcheting Damage of a Pressurized Elbow Undergoing Damage Seismic Inputs
,”
Nucl. Eng. Des.
,
196
(1), pp.
41
50
.
4.
Boussa
,
D.
,
DangYan
,
K.
, and
Labbe
,
P.
,
1994
, “
Fatigue-Seismic Ratcheting Interaction in Pressurized Elbows
,”
ASME J. Pressure Vessel Technol.
,
116
(4), pp.
396
402
.
5.
Chen
,
X.
,
Gao
,
B.
, and
Chen
,
G.
,
2006
, “
Ratcheting Study of Pressurized Elbows Subjected to Reversed in-Plane Bending
,”
ASME J. Pressure Vessel Technol.
,
128
(
4
), pp.
525
532
.
6.
Ravikiran
,
A.
,
Dubey
,
P. N.
,
Agrawal
,
M. K.
,
Reddy
,
G. R.
, and
Vaze
,
K. K.
,
2013
, “
Evaluation of Inelastic Seismic Response of Piping System Using Modified Iterative Response Spectrum Method
,”
ASME J. Pressure Vessel Technol.
,
135
(
4
), p.
041801
.
7.
Ravikiran
,
A.
,
Dubey
,
P. N.
,
Agrawal
,
M. K.
,
Reddy
,
G. R.
,
Singh
,
R. K.
, and
Vaze
,
K. K.
,
2015
, “
Experimental and Numerical Studies of Ratcheting in a Pressurized Piping System Under Seismic Load
,”
ASME J. Pressure Vessel Technol.
,
137
(
3
), p.
031011
.
8.
ASME
,
1995
, “ASME Boiler and Pressure Vessel Code, Section III, Division 1,” American Society of Mechanical Engineers, New York.
9.
Jaquay
,
K. R.
,
Larson
,
J. E.
, and
Tang
,
H. T.
,
1988
, “
A Simplified Method for Inelastic Piping System Seismic Response Prediction
,”
Nucl. Eng. Des.
,
107
(
1–2
), pp.
169
181
.
10.
Ravi Kiran
,
A.
,
Agrawal
,
M. K.
,
Reddy
,
G. R.
,
Vaze
,
K. K.
,
Ghosh
,
A. K.
, and
Kushwaha
,
H. S.
,
2006
, “Ratcheting Study in Pressurized Piping Components Under Cyclic Loading at Room Temperature,” Bhabha Atomic Research Centre, Mumbai, India, Report No.
BARC/2006/E/013
.
11.
Muthumani
,
K.
,
Lakshmanan
,
N.
,
Gopalakrishnan
,
N.
,
Satish Kumar
,
K.
,
Avinash
,
S.
, and
Seshi Reddy
,
L. R.
,
2002
, “Report on Shake Table Studies on a Pipe Elbow With Steady Internal Pressure,” Structural Engineering Research Centre, Chennai, India, Project No. CNP 054941.
12.
IEEE,
2013
, “IEEE Standard for Seismic Qualification of Equipment for Nuclear Power Generating Stations,” IEEE Power and Energy Society, New York, Standard No.
IEEE 344-2013
.
13.
U.S. Nuclear Regulatory Commission,
2009
, “Regulatory Guide 1.100, Seismic Qualification of Electrical and Active Mechanical Equipment and Functional Qualification of Active Mechanical Equipment for Nuclear Power Plants,” U.S. Nuclear Regulatory Commission, Washington, DC, accessed Feb. 1, 2018, https://www.nrc.gov/docs/ML0913/ML091320468.pdf
14.
Chaboche
,
J. L.
,
1986
, “
Time-Independent Constitutive Theories for Cyclic Plasticity
,”
Int. J. Plast.
,
2
(
2
), pp.
149
188
.
15.
ASME
,
2010
, “ASME Boiler and Pressure Vessel Code, Section III, Division 1,”
The American Society of Mechanical Engineers
,
New York
.
16.
Spence
,
J.
, and
Findlay
,
G. E.
,
1973
, “
Limit Load for Pipe Bends Under in-Plane Bending
,”
Second International Conference on Pressure Vessel Technology,
San Antonio, TX, Oct. 1–4, pp.
393
399
.
17.
Touboul
,
F.
,
Ben Djedidia, M.
, and
Acker, D.
,
1989
, “
Design Criteria for Piping Components Against Plastic Collapse: Application to Pipe Bend Experiments
,”
Sixth International Conference of Pressure Vessel Technology
, Beijing, China, Sept. 11–15, pp.
73
84
.
18.
Urabe
,
Y.
,
Takahashi
,
K.
,
Sato
,
K.
, and
Ando K
,
K.
,
2012
, “
Low Cycle Fatigue Behavior and Seismic Assessment for Elbow Pipe Having Local Wall Thinning
,”
ASME J. Pressure Vessel Technol.
,
134
(4), p.
041802
.
19.
Asada
,
S.
, and
Nakamura
,
T.
,
2011
, “
Simplified Elastic-Plastic Analysis Methods in the JSME Rules on Design and Construction
,”
J. Environ. Eng.
,
6
(
4
), pp.
753
764
.
You do not currently have access to this content.