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| Content Provider | Springer Nature Link |
|---|---|
| Author | Yu, Min Fang, Qihong Feng, Hui Liu, Youwen |
| Copyright Year | 2014 |
| Abstract | A theoretical model is established to investigate the interaction between the cooperative grain boundary (GB) sliding and migration and a semi-elliptical blunt crack in deformed nanocrystalline materials. By using the complex variable method, the effect of two disclination dipoles produced by the cooperative GB sliding and migration process on the emission of lattice dislocations from a semi-elliptical blunt crack tip is explored. Closed-form solutions for the stress field and the force acting on the dislocation are obtained in complex form, and the critical stress intensity factors for the first dislocation emission from a blunt crack under mode I and mode II loadings are calculated. Then, the influence of disclination strength, curvature radius of blunt crack tip, crack length, locations and geometry of disclination dipoles, and grain size on the critical stress intensity factors is presented detailedly. It is shown that the cooperative GB sliding and migration and the grain size have significant influence on the dislocation emission from a blunt crack tip. |
| Starting Page | 2005 |
| Ending Page | 2019 |
| Page Count | 15 |
| File Format | |
| ISSN | 00015970 |
| Journal | Acta Mechanica |
| Volume Number | 225 |
| Issue Number | 7 |
| e-ISSN | 16196937 |
| Language | English |
| Publisher | Springer Vienna |
| Publisher Date | 2014-01-16 |
| Publisher Place | Vienna |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Theoretical and Applied Mechanics Classical Continuum Physics Continuum Mechanics and Mechanics of Materials Structural Mechanics Vibration, Dynamical Systems, Control Engineering Thermodynamics, Heat and Mass Transfer |
| Content Type | Text |
| Resource Type | Article |
| Subject | Mechanical Engineering Computational Mechanics |
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