Nucleation of dislocation loop at the crack tip in a material subjected to uniaxial loading is investigated. Analytical expression for the total energy of rectangular dislocation loop at the crack tip is found. Depencence of the nucleation energy barrier on dislocation loop shape and stress intensity factor at the crack tip is determined. It is established that the energetic barrier for nucleation of dislocation loop strongly depends on the stress intensity factor. Nucleation of dislocation loop is very sensitive to stress field modifiers (forest dislocations, precipitates, clusters of point defects, etc.) in the crack tip vicinity.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa.de:bsz:d120-qucosa-29522 |
| Date | 31 March 2010 |
| Creators | Voskoboinikov, Roman E. |
| Contributors | Forschungszentrum Rossendorf, Institut für Sicherheitsforschung |
| Publisher | Forschungszentrum Dresden |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | doc-type:report |
| Format | application/pdf |
| Source | Wissenschaftlich-Technische Berichte / Forschungszentrum Rossendorf; FZR-344 März 2002 |
| Relation | dcterms:isPartOf:Wissenschaftlich-technische Berichte ; FZR-344 |
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