A fast and simple method for the determination of the residual deformation for a class of welding problems, ring-stiffened pipes, is proposed. The method can predictradial as well as angular distortion of the thin-walled pipe-ring-stiffener/flange assembly. The pipe and stiffener material is elasto-plastic. In particular, the accumulation of deformation in multipass welding is incorporated in the model. Each weld pass is treated separately. This facilitates the assessment of the influence of the sequence in which the weld passes are deposited on the residual deformation state. The method will be included in a conversational knowledge-based “expert” system for the production of a welded ring-stiffened pipe.

1.
Barborak
D. M.
,
Dickinson
D. W.
, and
Madigan
R. B.
,
1991
, “
PC-Based Expert Systems and Their Application to Welding
,”
Welding Journal
, Vol.
70
, pp.
29
38
.
2.
Brown
S. B.
, and
Song
H.
,
1992
, “
Implications of Three-Dimensional Numerical Simulations of Welding Large Structures
,”
Welding Journal
, Vol.
71
, pp.
55s–62s
55s–62s
.
3.
Bushnell
D.
,
1976
, “
BOSOR5-Program for Buckling of Elasto-Plastic Complex Shells of Revolution Including Large Deflections and Creep
,”
Computers & Structures
, Vol.
6
, pp.
221
240
.
4.
Chen
B.
, and
Peng
J.
,
1994
, “
Expert Systems and Their Development
,”
Welding in the World
, Vol.
34
, pp.
247
253
.
5.
Cook, R. D., Malkus, D. S., and Plesha, M. E., 1989, Concepts and Applications of Finite Element Analysis, Third Edition, John Wiley & Sons, New York, NY.
6.
Goldak, J., Oddy, A., Gu, M., Ma, W., Mashaie, A., and Hughes, E., 1992, “Coupling Heat Transfer, Microstructure Evolution and Thermal Stress Analysis in Weld Mechanics,” Mechanical Effects of Welding IUTAM-Symposium, Lulea˚ Sweden, eds, L. Karlsson, L.-E. Lindgren, and M. Jonsson, Springer-Verlag, Berlin, Germany, pp. 277–287.
7.
Josefson
B. L.
, and
Karlsson
C. T.
,
1989
, “
FE-Calculated Stresses in a MultiPass Butt-Welded Pipe—A Simplified Approach
,”
International Journal of Pressure Vessels and Piping
, Vol.
38
, pp.
227
243
.
8.
Josefson
B. L.
,
1993
, “
Prediction of Residual Stresses and Distortions in Welded Structures
,”
ASME JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING
, Vol.
115
, pp.
52
57
.
9.
Kojic
M.
, and
Bathe
K.-J.
,
1987
, “
Thermo-Elastic-Plastic and Creep Analysis of Shell Structures
,”
Computers & Structures
, Vol.
26
, pp.
135
143
.
10.
Lucas
W.
,
1994
, “
Experiences in Developing Expert Systems and Neural Networks for Arc Welding
,”
Welding in the World
, Vol.
34
, pp.
237
245
.
11.
Moshaiov
A.
, and
Song
H.
,
1990
, “
Near- and Far-Field Approximation for Analyzing Heating and Welding
,”
Journal of Thermal Stresses
, Vol.
13
, pp.
1
19
.
12.
Moshaiov
A.
, and
Song
H.
,
1991
, “
Modeling of Welding Distortion in Stiffened Rings
,”
Journal of Ship Research
, Vol.
35
, pp.
162
171
.
13.
Radaj, D., 1992, Heat Effects of Welding, Springer-Verlag, Berlin, Germany.
14.
Song
H.
, and
Moshaiov
A.
,
1990
, “
Modeling of Distortion in Girth-Welded Thin Pipes
,” ASME
Journal of Pressure Vessel Technology
, Vol.
112
, pp.
266
272
.
15.
Tessler
A.
,
1982
, “
An Efficient, Conforming Axisymmetric Shell Element Including Transverse Shear and Rotary Inertia
,”
Computers & Structures
, Vol.
15
, pp.
567
574
.
16.
Troive, L., and Jonsson, M., 1994, “Numerical and Experimental Study of Residual Deformations due to Double-J Multi-Pass Butt-Welding of a Pipe-Flange Joint,” Proceedings of the IEMS 94 (1994 Annual International Conference on Industry, Engineering and Management Systems), Cocoa Beach, FL.
17.
Unemoto
T.
, and
Tanaka
S.
,
1984
, “
A Simplified Approach to Calculate Weld Residual Stresses in a Pipe
,”
IHI Engineering Review
, Vol.
17
, pp.
177
183
.
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