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Comparative Fretting Fatigue Life Evaluation between Critical Plane Based and Deviatoric Strain Amplitude Based Methods Corrected for Surface Wear Damage
Journal Article
05-15-02-0009
ISSN: 1946-3979, e-ISSN: 1946-3987
Sector:
Citation:
Ozarde, A., McNay, G., and Gautam, S., "Comparative Fretting Fatigue Life Evaluation between Critical Plane Based and Deviatoric Strain Amplitude Based Methods Corrected for Surface Wear Damage," SAE Int. J. Mater. Manf. 15(2):111-132, 2022, https://doi.org/10.4271/05-15-02-0009.
Language:
English
Abstract:
Fretting failure mode is commonly observed at the contact interface of mating
parts, held together under normal load and subjected to vibratory and/or
imbalanced system forces. This article presents the fretting fatigue life
estimation of a complete flat-flat contact pair using a relatively new approach,
i.e., deviatoric strain amplitude-based (SI) parameter, further combined with
Ding’s empirical parameter D
fret2, which considers the effect of resultant
frictional work on fretting fatigue life. The results are compared with
traditional critical plane-based methods like Smith-Watson-Topper (SWT) and
Fatemi-Socie (FS). Observing high load-factor values corresponding to material
yielding, non-linear material models are considered to account for possible
plastic shakedown/ratcheting phenomenon. Overall good experimental correlation
is observed for all three fatigue initiation methods, within a
±3N scatter band. The advantage of deviatoric strain
amplitude-based parameter over SWT and FS methods is that it does not require
critical plane-based calculations and, hence, is computationally more efficient.
The effect of wear on fretting fatigue is considered through two different
techniques: progressive wear modeling and fretting-specific parameter. Under
progressive wear modeling technique, Archard’s wear model is considered whereas
Ding’s D
fret2 parameter is considered under fretting specific
parameter. Since Ding’s D
fret2 parameter, considers the correction factor
corresponding to actual frictional work, it predicts a better correlation than
Archard’s wear model, which considers a single wear coefficient value for
different load-stroke combinations.