The maximal dissipation rate criterion—II: Analysis of fatigue crack propagation in FCC single crystals
| Autor: | David W. Hoeppner, D.C. Wu, J.S. Short |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Work (thermodynamics)
Materials science business.industry Mechanical Engineering Fracture mechanics Rate equation Structural engineering Mechanics Dissipation Crack growth resistance curve Superalloy Condensed Matter::Materials Science Crack closure Mechanics of Materials Thermodynamic free energy General Materials Science business |
| Zdroj: | Engineering Fracture Mechanics. 34:15-30 |
| ISSN: | 0013-7944 |
| DOI: | 10.1016/0013-7944(89)90239-7 |
| Popis: | The following hypothesis has recently been offered for consideration; Crack propagation occurs such that a cracked body 's global dissipation rate is maximized. The present work summarizes results of two recent experimental investigations into the fatigue crack propagation behavior of SRR-99 nickel base superalloy single crystals. Several observations made during the course of these studies are rationalized using a special case of the maximal dissipation rate criterion. It is recalled that the thermodynamic energy balance used to define the dissipation rate also yields a general fatigue crack propagation rate equation. Implications of this equation for the modeling of fatigue crack propagation are briefly discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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