Dislocation crack tip shielding and the Paris exponent
| Autor: | Johannes Weertman |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Condensed matter physics business.industry Mechanical Engineering medicine.medical_treatment Fracture mechanics Structural engineering Rate equation Paris' law Condensed Matter Physics Condensed Matter::Materials Science Crack closure Mechanics of Materials Electromagnetic shielding Exponent medicine General Materials Science Dislocation business Reduction (orthopedic surgery) |
| Zdroj: | Materials Science and Engineering: A. :59-63 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2006.08.128 |
| Popis: | In a previous paper we considered how the crack blunting dislocation emission mechanism likely leads to a Paris fatigue crack growth rate law exponent n = 2 if dislocation shielding is not important and showed how dislocation crack tip shielding can cause a reduction in the fatigue crack growth rate and showed qualitatively how it might lead to an increase in the Paris exponent n. In this paper semi-quantitative calculations are made to show how the Paris exponent can be increased by dislocation shielding. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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