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Application of Multiaxial Fatigue Criteria for Fretting Fatigue Analysis and Life Predictions

Fretting fatigue is a complex mechanical failure phenomenon, characterized by damage caused by the combined effects of cyclic loading and small amplitude relative motion between contacting surfaces. This failure mode may occur in many applications such as bolted lap joints, press fit connections, splined couplings, power transitions, bio-implants, bearing shafts, bolted and riveted connections, and dovetail roots of turbine blades. Fretting fatigue can significantly affect the performance of components, thus, prediction of fretting fatigue life is an important consideration in damage tolerant design. Many factors affect the fretting fatigue behavior of materials including microstructure, surface condition, contact geometry, contact pressure, slip amplitude, coefficient of friction,…

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Fretting fatigue is a complex mechanical failure phenomenon, characterized by damage caused by the combined effects of cyclic loading and small amplitude relative motion between contacting surfaces. This failure mode may occur in many applications such as bolted lap joints, press fit connections, splined couplings, power transitions, bio-implants, bearing shafts, bolted and riveted connections, and dovetail roots of turbine blades. Fretting fatigue can significantly affect the performance of components, thus, prediction of fretting fatigue life is an important consideration in damage tolerant design. Many factors affect the fretting fatigue behavior of materials including microstructure, surface condition, contact geometry, contact pressure, slip amplitude, coefficient of friction, environment, and cycling frequency. The progression of fretting fatigue failure is characterized by a gradual accumulation of surface damage, with micro-cracks initiating at the contact interface and crack growth until failure. Given that fretting fatigue is predominantly a high-cycle fatigue issue, where the initiation phase generally governs the life, it is a common practice to consider only the initiation phase.

Fretting fatigue is inherently a multiaxial fatigue problem, characterized by non-proportional stresses that induce complex multiaxial stress fields with high stress gradients. Consequently, multiaxial fatigue criteria are frequently employed to predict fretting fatigue failures. Among the prevalent modeling frameworks for fretting fatigue crack initiation, the most recognized are the Critical Plane (CP), Stress Invariant (SI), Continuum Damage Mechanics (CDM), and Fretting Specific approaches. Figure 1 provides an overview of this classification including some of the parameters used in the literature for each approach. The Critical Plane approach is widely regarded as the most suitable model, given its ability to also predict the crack initiation location and orientation by considering the planes where damage is most likely to occur. The Smith-Watson-Topper (SWT) parameter in its critical plane formulation, and the Fatemi-Socie (FS) parameter are among the most applied methods for fretting fatigue crack initiation predictions.

This work provides an overview of multiaxial fretting fatigue life models in general and investigates the application of critical plane approach in particular. Incorporation of stress gradient effect, mean stress, and other effects are also discussed. Fretting fatigue data from the literature were gathered including four aluminum alloys along with two distinct datasets for Ti-6Al-4V and with a broad range of pad radii and loading conditions. An example of the resulting fretting fatigue life predictions based on the critical plane approach is shown in Figure 2. The employed modeling approach demonstrates robustness for predicting fretting fatigue life. Improvements for fretting fatigue life are also discussed, including surface treatments as well as benefits offered by application of the recent additive manufacturing technology.

Artikelnummer
ICMFF14-2025-20

Titel
Application of Multiaxial Fatigue Criteria for Fretting Fatigue Analysis and Life Predictions
Autor(en)
S. Ghadar, A. Fatemi, N. Phan
DOI
10.48447/ICMFF14-2025-20
Veranstaltung
14. International Conference on Multiaxial Fatigue and Fracture 2025
Jahr der Veröffentlichung
2025
Publikationsart
Tagungsmanuskript (PDF)
Sprache
Englisch
Stichwörter
Multiaxial Fatigue,Fretting Fatigue,Life Prediction