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| Micro-Simulation of Crack Tip Plastic Zone and Dislocation-Free Zone |
| QIAN Caifu; JIANG Zhongjun; CHEN Ping; DUAN Chenghong; CUI Wenyong |
| Department of Process Equipment and Control Engineering; Beijing University of Chemical Technology; Beijing 100029 |
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Cite this article:
QIAN Caifu; JIANG Zhongjun; CHEN Ping; DUAN Chenghong; CUI Wenyong. Micro-Simulation of Crack Tip Plastic Zone and Dislocation-Free Zone. Acta Metall Sin, 2004, 40(2): 159-162 .
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Abstract Edge dislocation emissions from Mode I, Mode II and mixed-mode crack
tips along multiple inclined slip planes are simulated, and plastic
zones as well as dislocation--free zones are obtained. It is found
that the shape of the Mode II plastic zone is quite different from that
obtained based on von Mises yielding criterion and consists of three parts
in which the biggest one locates in front of the crack tip. For Mode I
crack, however, a similar plastic zone is obtained. Under the same
magnitudes of applied stress, the plastic zone of Mode II crack is
much larger than that of Mode I crack, and the plastic zone of a
mixed--mode crack is mainly affected by the Mode II component.
Dislocation--free zones exist around all types of crack tips,
which have similar shapes as the corresponding plastic zones.
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Received: 24 February 2003
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