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A Stress-based Nonproportional Fatigue Model for Welded Joints Under Variable Amplitude Loading
Technical Paper
2006-01-0773
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes a simple model to handle nonproportional fatigue of welded joints under multiaxial variable amplitude loading. The new damage parameter is essentially the weld-toe equivalent stress amplitude, modified by a multiaxial Morrow mean stress correction factor, and a measure of material sensitivity and strength of the nonproportional loading path within a cycle. It is based on Sonsino's “Effective Equivalent Stress Hypothesis” model. The new model is able to utilize multiaxial variable amplitude PG (Proving Grounds) load data through the use of weld-toe stress concentration factors and the Wang-Brown multiaxial reversal counting technique.
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Lee, Y., Tjhung, T., and Jordan, A., "A Stress-based Nonproportional Fatigue Model for Welded Joints Under Variable Amplitude Loading," SAE Technical Paper 2006-01-0773, 2006, https://doi.org/10.4271/2006-01-0773.Also In
References
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- Sonsino, C. M. 1997 “Schwinfestigkeit von geschweiβten komponenten under komplexen elasto-plastischen, mahrachsigen verformungen.” Fraunhofer Institut Betriebsfestigkeit Darmstadt