Fatigue Life Prediction Using Average Strain Range of Fatigue Process Zone

Dong Lei; Bin Kai Shi; Ge Li; Jian Hua Zhao

doi:10.4028/www.scientific.net/AMM.29-32.474

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 29-32Fatigue Life Prediction Using Average Strain Range...

Fatigue Life Prediction Using Average Strain Range of Fatigue Process Zone

Abstract:

In low-cycle fatigue process, plastic strain takes place at notch root vicinity fast appears induced by high stress concentration. Plastic strain makes material non-uniform and the change of distribution of local stress. The approximation to stress concentration point of Neuber’s rule is not suitable for some plastic materials in engineering practice. In this paper, the average strain of fatigue process zone was considered to substitute Neuber strain for predicting fatigue life. Prediction results indicated that average strain range of fatigue process zone is more suitable than Neuber strain range for predicting low-cycle fatigue life of LY12CZ.

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Applied Mechanics and Materials (Volumes 29-32)

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474-478

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https://doi.org/10.4028/www.scientific.net/AMM.29-32.474

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Online since:

August 2010

Authors:

Dong Lei, Bin Kai Shi, Ge Li, Jian Hua Zhao

Keywords:

Average Strain Range, Fatigue Life Prediction, Fatigue Process Zone

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