Estimation of fretting fatigue life using a multiaxial stress-based critical distance methodology
This work presents a methodology for life estimation of mechanical couplings subjected to fretting fatigue. In this approach, a stress-based multiaxial fatigue parameter is evaluated at a critical distance below the contact surface. The fatigue parameter is based on an improved formulation of the...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2015-07-01
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| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero33/numero_33_art_49.pdf |
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| Summary: | This work presents a methodology for life estimation of mechanical couplings subjected to fretting
fatigue. In this approach, a stress-based multiaxial fatigue parameter is evaluated at a critical distance below the
contact surface. The fatigue parameter is based on an improved formulation of the Modified Wöhler Curve
Method, in which the shear stress amplitude is measured via the Maximum Rectangular Hull method. To apply
the Theory of Critical Distances in the medium-cycle fatigue regime, the critical distance is assumed to depend
on the number of cycles to failure. Available fretting fatigue data, conducted on a cylinder-plane contact
configuration made of Al alloy 4% Cu, were used to assess the methodology. Most of the life estimates were
within an error band given by a factor of 2. |
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| ISSN: | 1971-8993 1971-8993 |