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 language | English |
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Article number | 7026 |
Number of pages | 9 |
Journal | Journal of Applied Physics |
Volume | 78 |
Issue number | 12 |
DOIs | |
Publication status | Published - 15 Dec 1995 |
Bibliographical note
ACKNOWLEDGMENTSThis research project is jointly supported by the National Natural Science Foundation of China, and by the State Education Commission of China