TY - GEN
T1 - A new framework for fatigue life prediction under random loading conditions
AU - Chen, Jie
AU - Liu, Yongming
N1 - Funding Information:
The research is partially supported by fund from NAVAIR through subcontract from Technical Data Analysis, Inc (TDA) (contract No. N68-335-18-C-0748, program manager: Krishan Goel). The support is greatly appreciated.
Publisher Copyright:
© 2021, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2021
Y1 - 2021
N2 - A new framework for predicting the fatigue life under random loading conditions is proposed in this paper. The piecewise stochastic rainflow counting (PSRC) is proposed to transform the random loading spectrum to a series of block loadings in a piecewise manner. The block loading sequence effect is considered through a block sequence randomization. The random fatigue limit model is used and enhanced by the Dietman mean stress correction model to calculate the fatigue life for a constant loading considering the mean stress effect and fatigue limit. Both the linear and nonlinear damage accumulation rule ae used for the criterions for the fatigue damage accumulation until failure. The loading sequence effect for random loading is studied by comparing the results from the linear and nonlinear fatigue damage accumulation rule. The predicted fatigue lives are slightly conservative for the selected nonlinear damage accumulation rule than that for Miner rule in the proposed framework. The fatigue life prediction is better with the nonlinear damage accumulation rule.
AB - A new framework for predicting the fatigue life under random loading conditions is proposed in this paper. The piecewise stochastic rainflow counting (PSRC) is proposed to transform the random loading spectrum to a series of block loadings in a piecewise manner. The block loading sequence effect is considered through a block sequence randomization. The random fatigue limit model is used and enhanced by the Dietman mean stress correction model to calculate the fatigue life for a constant loading considering the mean stress effect and fatigue limit. Both the linear and nonlinear damage accumulation rule ae used for the criterions for the fatigue damage accumulation until failure. The loading sequence effect for random loading is studied by comparing the results from the linear and nonlinear fatigue damage accumulation rule. The predicted fatigue lives are slightly conservative for the selected nonlinear damage accumulation rule than that for Miner rule in the proposed framework. The fatigue life prediction is better with the nonlinear damage accumulation rule.
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M3 - Conference contribution
AN - SCOPUS:85100264237
SN - 9781624106095
T3 - AIAA Scitech 2021 Forum
SP - 1
EP - 7
BT - AIAA Scitech 2021 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
Y2 - 11 January 2021 through 15 January 2021
ER -