%0 Journal Article
%T Micro-Simulation of Crack Tip Plastic Zone and Dislocation-Free Zone<br>裂纹尖端塑性区和无位错区的微观模拟
%A QIAN Caifu
%A JIANG Zhongjun
%A CHEN Ping
%A DUAN Chenghong
%A CUI Wenyong
%A <br>钱才富
%A 姜忠军
%A 陈 平
%A 段成红
%A 崔文勇
%J 金属学报
%D 2004
%I 
%X 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.
%K dislocation emission
%K crack
%K plastic zone<br>位错发射
%K 塑性区
%K 无位错区
%K 断裂力学
%K 裂纹
%K 微观模拟
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=000CF83D7F70FE82&yid=D0E58B75BFD8E51C&vid=1371F55DA51B6E64&iid=0B39A22176CE99FB&sid=BA79719BCA7341D5&eid=F1177A9DF1349B63&journal_id=0412-1961&journal_name=金属学报&referenced_num=3&reference_num=30