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Stresses in bent copper tubing: Application to fatigue and stress-corrosion cracking failure mechanisms

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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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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

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