On the estimation of finite lifetime under fretting fatigue loading
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
The aim of this paper is to formulate and validate an alternative design approach suitable for predicting finite lifetime of mechanical assemblies subjected to constant amplitude (CA) fretting fatigue loading. The design methodology being proposed is based on the use of the Modified Wӧhler Curve Method (MWCM) applied in conjunction with both the Theory of Critical Distance (TCD) and the Shear Stress-Maximum Variance Method (-MVM). In more detail, the TCD, applied in the form of the Point Method (PM), is used to take into account the damaging effect of the multiaxial stress gradients acting on the material in the vicinity of the contact region. The time-variable linear-elastic stress state at the critical locations is then post-processed according to the MWCM which is a bi-parametrical criterion that estimates fatigue lifetime via the stress components relative to those planes experiencing the maximum shear stress amplitude. Thanks to its specific features, the MWCM is capable of modelling not only the presence of non-zero mean stresses, but also the degree of multiaxiality and non-proportionality of the local load history being investigated. In this setting, the -MVM is used to calculate the stress quantities relative to the critical plane whose orientation is determined numerically by locating that plane containing the direction experiencing the maximum variance of the resolved shear stress. The accuracy and reliability of the proposed design methodology was checked against a number of experimental data taken from the literature and generated by testing four different metallic materials. The agreement between experiments and estimates being obtained strongly supports the idea that the proposed approach can be used to perform a rapid assessment of mechanical assemblies damaged by in-service fretting fatigue loading.
Date Issued
2018-07-01
Date Acceptance
2018-03-09
Citation
International Journal of Fatigue, 2018, 112, pp.138-152
ISSN
0142-1123
Publisher
Elsevier
Start Page
138
End Page
152
Journal / Book Title
International Journal of Fatigue
Volume
112
Copyright Statement
© 2018 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Subjects
Science & Technology
Technology
Engineering, Mechanical
Materials Science, Multidisciplinary
Engineering
Materials Science
Fretting fatigue
Fatigue life estimation
Theory of critical distances
Multiaxial fatigue
WOHLER CURVE METHOD
HIGH-CYCLE FATIGUE
NOTCHED COMPONENTS
CRITICAL DISTANCES
CRACK INITIATION
ALUMINUM-ALLOY
SHEAR-STRESS
HULL METHOD
CONTACT
STRENGTH
0913 Mechanical Engineering
0905 Civil Engineering
Mechanical Engineering & Transports
Publication Status
Published
Date Publish Online
2018-03-13