A MODIFIED FRACTURE MECHANICS APPROACH TO METAL FATIGUE
| Autor: | David L. DuQuesnay, T. H. Topper, H. Abdel-Raouf, Alan Plumtree |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Fracture mechanics Structural engineering Fatigue limit Stress (mechanics) Crack closure Mechanics of Materials visual_art Aluminium alloy visual_art.visual_art_medium General Materials Science Composite material business Compact tension specimen Stress intensity factor Stress concentration |
| Zdroj: | Fatigue & Fracture of Engineering Materials and Structures. 15:979-993 |
| ISSN: | 1460-2695 8756-758X |
| DOI: | 10.1111/j.1460-2695.1992.tb00026.x |
| Popis: | The fatigue lives, the fatigue limit stress ranges and fatigue notch factors for metallic specimens can be predicted using a modified fracture mechanics model for short cracks based on the combination of solutions for the non-uniform strains at the surface of a metal and the development of crack closure. The resulting local stress intensity factor exceeds that indicated by linear elastic fracture mechanics at short crack lengths. The model predicts a smooth and continuous variation of the fatigue notch factor with notch size between a lower bound of unity and an upper bound equal to the theoretical notch stress concentration factor. The model is verified using experimental data for a 2024-T351 aluminium alloy for smooth and notched specimens tested at various stress ratios. |
| Databáze: | OpenAIRE |
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