Abstract
The residual and applied stresses in u-bent copper tubing are addressed in the context of both cyclic fatigue and stress-corrosion cracking. Failures as a result of fatigue and stress corrosion cracking in u-bent copper tubing have been observed to initiate at nonintuitive locations when only the applied stresses on the component are considered. This paper presents both qualitative classical and quantitative finite-element stress analysis results for the forming of u-bends. The resulting residual stress distributions are compared to fracture patterns generated by both fatigue and stress-corrosion cracking mechanisms.
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References
D.H. Duffner: “Air Conditioner Failure Investigation—Intergranular Cracking in a Pure Copper Condenser Tube,” J. Failure Analysis and Prevention, 2005, 5(1), pp. 79–85.
J.L. McDougall and M.E. Stevenson: “Stress-Corrosion Cracking in Copper Refrigerant Tubing,” J. Failure Analysis and Prevention, 2005, 5(1), pp. 13–18.
J. Lubliner: Plasticity Theory, Macmillan Publishing Company, N.Y., 1990, p. 224.
N.C. Tang: “Plastic-Deformation Analysis in Tube Bending,” Int. J. Pres. Ves. Pip., 2000, 77, pp. 751–59.
R.D. Cook and W.C. Young: Advanced Mechanics of Materials, Macmillan Publishing Company, N.Y., 1985, pp. 413–15.
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Stevenson, M.E., McDougall, J.L. & Barkey, M.E. Stresses in bent copper tubing: Application to fatigue and stress-corrosion cracking failure mechanisms. J Fail. Anal. and Preven. 5, 25–29 (2005). https://doi.org/10.1361/154770205X76367
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DOI: https://doi.org/10.1361/154770205X76367