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.
A Stress-based Nonproportional Fatigue Model for Welded Joints Under Variable Amplitude Loading
Sae Technical Papers
SAE 2006 World Congress & Exhibition ; 2006
2006-04-03
Aufsatz (Konferenz)
Englisch
A stress based nonproportional fatigue model for welded joints under variable amplitude loading
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