Notice of RetractionA modified non-linear damage accumulation model considering load interaction effects under two-level loading

Many structures are subjected to variable amplitude loading in engineering practice. The foundation of fatigue life prediction under variable amplitude loading is how to deal with the fatigue damage accumulation in the case of two-level loading. A non-linear fatigue damage accumulation model which can explain the influence of loading sequences was proposed in earlier literature, but the model cannot consider the load interaction effect. A modified non-linear damage accumulation model is proposed in this paper to account for the loading interaction effects. Experimental data of two metallic materials are used to validate the proposed model. The agreement between model predictions and experimental data is observed, especially under high-low loading conditions.

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