Nonlinear motion of crack tip atoms during dislocation emission processes

Henry Tan, Wei Yang

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Nonlinear features of dislocation emission processes under mode II loads are explored from an atomic scale. Crack tip atom string models coupling with the continuum mechanics analysis are devised. Dynamic analysis shows that the atom motion at the crack tip changes from periodic to chaotic, as the mode II stress intensity factor increases. The chaotic atom motion dictates the dislocation nucleation process at the crack tip. Study on the dislocation emission band reveals the phenomenon of cloudlike drifting of the dislocation core ahead of the crack tip.
Original languageEnglish
Article number7026
Number of pages9
JournalJournal of Applied Physics
Volume78
Issue number12
DOIs
Publication statusPublished - 15 Dec 1995

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