A straight pipe was expanded at one end by inserting a rigid disk. The residual stress measured at the inner surface shows a strong tensile peak beyond the region where the pipe was directly expanded by the insertion of the disk. The reason the residual stress reaches its peak at a location further into the pipe is discussed based on a FE analysis. The residual stress was found to reach its tensile peak at the plastic region front that was developed during the pipe expansion. A simple formula for identifying the tensile peak location is also proposed.
Issue Section:
Technical Papers
1.
Williams, D. K., 1996, “Prediction of Residual Stress Field in Mechanically Expanded 0.750″ Diameter Steam Generator Tube Plugs-Part 1: 2-D Solution,” ASME PVP Vol. 327.
2.
Takamatsu, H., 1991, “Aiming for Improved SG Reliability in Japan,” Nuclear Engineering International, Wilmington Publishing, Kent, UK, pp. 26–27.
3.
Hill, R., 1950, The Mathematical Theory of Plasticity, Oxford Univ. Press, Section 2 in Chap. 5.
4.
Jahed
, H.
, and Dubey
, R. N.
, 1997
, “An Axisymmetric Method of Elastic-Plastic Analysis Capable of Predicting Residual Stress Field
,” ASME J. Pressure Vessel Technol.
, 119
, pp. 264
–273
.5.
Druez
, J.
, Bazergui
, A.
, and Pettigrew
, M. J.
, 1985
, “Residual Stresses in Roller-Expanded Thin Tubes
,” Exp. Mech.
, 24
, pp. 316
–324
.6.
Nadai
, A.
, 1943
, “Theory of the Expanding of Boiler and Condenser Tube Joints Through Rolling
,” Trans. ASME
, 65
, pp. 865
–880
.7.
Aufaure, M., Boudot, R., Zacharie, and Proix, J. M., 1987, “Analysis of Residual Stresses due to Roll-Expansion Process: Finite Element Computation and Validation by Experimental Tests,” Trans. of 9th Intl. Conf. of SMiRT, Vol. B, pp. 499–503.
8.
Updike
, D. P.
, Kalnins
, A.
, and Caldwell
, S. M.
, 1992
, “Residual Stresses in Transition Zones of Heat Exchanger Tubes
,” ASME J. Pressure Vessel Technol.
, 114
, pp. 149
–156
.9.
Chiba, N., Ishida, Y., Itoh, H., Enomoto, K., and Kimoto, H., 2000, “Residual Stress Analysis of Plastically Expanded Pipe,” ASME PVP Vol. 401, pp. 81–85.
10.
Timoshenko, S., and Woinowsky-Krieger, S., 1959, Theory of Plates and Shells, McGraw-Hill Kogakusha, pp. 468–476.
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