Crack path simulation for cylindrical contact under fretting conditions
In this work different strategies to estimate crack path for cylindrical contacts under fretting conditions are carried out. The main goal is to propose and to evaluate methodologies not only to estimate the direction of crack initiation but also the subsequent propagation in its earlier stages, w...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Gruppo Italiano Frattura
2016-02-01
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| Series: | Fracture and Structural Integrity |
| Subjects: | |
| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero35/numero_35_art_46.pdf |
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| Summary: | In this work different strategies to estimate crack path for cylindrical contacts under fretting
conditions are carried out. The main goal is to propose and to evaluate methodologies not only to estimate the
direction of crack initiation but also the subsequent propagation in its earlier stages, where the stress field is
multiaxial, non-proportional and decays very fast due to the proximity with the contact interface. Such complex
conditions pose a substantial challenge to the modelling of crack path. The numerical simulations are provided
by a 2D Finite Element Analysis taking into account interactions between the crack faces. The results show that,
under fretting conditions, models based on the critical plane method are not effective to estimate the crack
initiation orientation, while models based on a so called “critical direction” applied along a critical distance
provide better results. Regarding the subsequent crack propagation orientation, it was possible to see that stress
intensity factor based models where one considers an infinitesimal virtual crack emerging from an original preexistent
crack are powerful mechanisms of crack orientation estimation. |
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| ISSN: | 1971-8993 1971-8993 |