Fatigue and Fracture of Engineering Materials and Structures, Volume (38), No (9), Year (2015-9) , Pages (489-502)

Title : ( An investigation of the fatigue of CK45 steel in the as-received state and after pre-fatigue deformation )

Authors: Mahmoud Shariati , Hamed Mehrabi ,

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Abstract

Fatigue failure, ratcheting behaviour and influence of pre-fatigue on fatigue behaviour were investigated under uniaxial cyclic loading for CK45 steel at room temperature. The fatigue life was recorded for various stress ratios, and then, three mean stress models were considered. The Walker model showed an acceptable accuracy in comparison with Smith–Watson–Topper and Park et al. models. The ratcheting strains were measured for various loading conditions in order to evaluate the impact of mean stress, stress amplitude and stress ratio on ratcheting behaviour. The experimental results showed that the ratcheting strain increased with increasing mean stress, stress amplitude and stress ratio. In addition, the results of the post-ratcheting-fatigue tests showed that although the fatigue life decreased with increasing pre-ratcheting strain (the ratcheting strain that is accumulated in pre-fatigue), the loading condition that pre-fatigue experiments were conducted has a significant effect on subsequent fatigue behaviour.

Keywords

CK45 steel; fatigue; ratcheting; uniaxial cyclic loading
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@article{paperid:1046947,
author = {Shariati, Mahmoud and Hamed Mehrabi},
title = {An investigation of the fatigue of CK45 steel in the as-received state and after pre-fatigue deformation},
journal = {Fatigue and Fracture of Engineering Materials and Structures},
year = {2015},
volume = {38},
number = {9},
month = {September},
issn = {8756-758X},
pages = {489--502},
numpages = {13},
keywords = {CK45 steel; fatigue; ratcheting; uniaxial cyclic loading},
}

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%0 Journal Article
%T An investigation of the fatigue of CK45 steel in the as-received state and after pre-fatigue deformation
%A Shariati, Mahmoud
%A Hamed Mehrabi
%J Fatigue and Fracture of Engineering Materials and Structures
%@ 8756-758X
%D 2015

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