Volume 06,Issue 03

Fatigue Life Prediction Based On Nonlinear Fatigue Accumulation Damage Model Under Combined Cycle Loadings

Authors

Peng Yue, Juan Ma, Tian-Xiang Li, Chang-Hu Zhou, Hao Jiang

Abstract
Combined high and low cycle fatigue (CCF) of aircraft turbine blades was studied in this paper. With the aim to accurately estimate the CCF damage of turbine blade alloys, a new life prediction model was presented on the basis of nonlinear damage rule to address the loading history and interaction of high cycle fatigue and low cycle fatigue. To conduct the model validation, four experimental data sets of turbine blade alloy materials and turbine blades were utilized. The statistical analysis of model validation and model errors suggested that the presented model provides the highest accurate predictions by comparing with those of three typical common models.

Keyword: Combined cycle fatigue, Turbine blades， Fatigue damage， Life prediction.

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