Mixed mode fatigue crack propagation in a ferritic–perlitic cold drawn tube
| Autor: | H. Desimone, Stefano Beretta, Angela Cerrini |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Work (thermodynamics)
Materials science business.industry Mechanical Engineering Mode (statistics) Fracture mechanics Mechanics Structural engineering Finite element method Shear (sheet metal) Crack closure Mechanics of Materials Mode coupling General Materials Science Tube (fluid conveyance) business |
| Zdroj: | Engineering Fracture Mechanics. 75:845-856 |
| ISSN: | 0013-7944 |
| Popis: | Previous work by the authors has shown that torsional fatigue tests on cold drawn tube specimens with a longitudinal micronotch present both Mode III ahead of the crack tip (throughout the tube thickness) and Mode I at the defect edges. The co-planar Mode III propagation was prevalent and is followed by Mode II crack propagation along the cold drawn direction. In this work, this behaviour is further investigated by a new series of experimental tests together with a finite element analysis. The mechanisms behind this competition between Mode I and Mode III cracks are analysed and some fractographies were performed on run-outs, broken and interrupted tests. Indeed, pure Mode I and pure Mode II crack propagation rates along with mixed mode crack propagation rates are analysed. Finally, the conditions in order to get Mode I crack growth or shear driven propagation are discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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