A Stress-based Nonproportional Fatigue Model for Welded Joints Under Variable Amplitude Loading
2006-01-0773
04/03/2006
- Event
- Content
- 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.
- Pages
- 6
- Citation
- 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.