Equivalent configurations for notch and fretting fatigue
Under the typical partial slip conditions under which fretting fatigue takes place, the amount of superficial damage is small. Therefore, the substantial reduction in fatigue life caused by fretting, when compared to plain fatigue, may well be more associated with the stress concentration and the...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2015-07-01
|
| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero33/numero_33_art_47.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Under the typical partial slip conditions under which fretting fatigue takes place, the amount of
superficial damage is small. Therefore, the substantial reduction in fatigue life caused by fretting, when
compared to plain fatigue, may well be more associated with the stress concentration and the stress gradient
phenomena generated by the contact problem than to the superficial loss of material. In this setting, notch
stress-based methodologies could, in principle, be applied to fretting in the medium/high cycle fatigue regime.
The aim of this work was to investigate whether it is possible to design fretting and notch fatigue
configurations, which are nominally identical in terms of damage measured by a multiaxial fatigue model. The
methodology adopted to carry out this search considered a cylindrical on flat contact and a V-notch. Load and
geometry dimensions of both configurations were adjusted in order to try to obtain the “same” decay of the
Multiaxial Fatigue Index from the hot spot up to a critical distance. Positive results of such simulations can lead
us to design an experimental program that can bring more firm conclusions on the use of pure stress-based
approaches, which do not include the wear damage, in the modeling of fretting fatigue. |
|---|---|
| ISSN: | 1971-8993 1971-8993 |