A NOVEL NUMERICAL METHOD FOR FATIGUE LIFE PREDICTION UNDER NON-PROPORTIONAL LOADINGS

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MANSOORI HASAN; BABAEI SAEID; GHASEMI GHALEBAHMAN AHMAD

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Journal: Modares Mechanical Engineering Year:2017 | Volume:17 | Issue:5 Page(s): 232-242

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Title

A NOVEL NUMERICAL METHOD FOR FATIGUE LIFE PREDICTION UNDER NON-PROPORTIONAL LOADINGS

Author(s)

MANSOORI HASAN | BABAEI SAEID | GHASEMI GHALEBAHMAN AHMAD | Issue Writer Certificate

Keywords

FATIGUEQ2

FATIGUE MODELSQ1

NUMERICAL METHODSQ1

DAMAGE MECHANICSQ2

Abstract

The present study proposes a novel numerical method for FATIGUE life prediction under non-proportional loading. This method is employed for FATIGUE life estimation of different materials including 1045 Steel, 30CrNiMo8HH, Titanium TC4, extracted AZ31B Magnesium and Aluminum alloy 6061 under both proportional and non-proportional loadings. Basis of the method is developed in the framework of two numerical modifications. The first modification modifies FATIGUE damage parameters by correlating damage quantities of non-proportional loading to the proportional one. The second modification uses the same equation as the first one, but the corresponding damage coefficient is replaced by the additional hardening coefficient. In addition, these modifications are applied to FATIGUE damage parameters including maximum shear strain, SWT, Fatemi-Socie, and Babaei-Ghasemi model and are also verified against experimental observations available in literature. Furthermore, the obtained results are discussed in detail and are also compared to the non-modified findings. Moreover, the variation of the FATIGUE life prediction error is calculated for the aforementioned models. Finally, the results show consideration and implementation of these modifications significantly improves the accuracy of the predicted FATIGUE lives for all the studied cases.

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APA: Copy

MANSOORI, HASAN, BABAEI, SAEID, & GHASEMI GHALEBAHMAN, AHMAD. (2017). A NOVEL NUMERICAL METHOD FOR FATIGUE LIFE PREDICTION UNDER NON-PROPORTIONAL LOADINGS. MODARES MECHANICAL ENGINEERING, 17(5 ), 232-242. SID. https://sid.ir/paper/179174/en

Vancouver: Copy

MANSOORI HASAN, BABAEI SAEID, GHASEMI GHALEBAHMAN AHMAD. A NOVEL NUMERICAL METHOD FOR FATIGUE LIFE PREDICTION UNDER NON-PROPORTIONAL LOADINGS. MODARES MECHANICAL ENGINEERING[Internet]. 2017;17(5 ):232-242. Available from: https://sid.ir/paper/179174/en

IEEE: Copy

HASAN MANSOORI, SAEID BABAEI, and AHMAD GHASEMI GHALEBAHMAN, “A NOVEL NUMERICAL METHOD FOR FATIGUE LIFE PREDICTION UNDER NON-PROPORTIONAL LOADINGS,” MODARES MECHANICAL ENGINEERING, vol. 17, no. 5 , pp. 232–242, 2017, [Online]. Available: https://sid.ir/paper/179174/en

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