%0 Journal Article
%T NUMERICAL MODELING OF DUCTILE CRACK EXTENSION USING COMPUTATIONAL CELL ELEMENTS FOR WELDED JOINTS
%A H Y Jing
%A LX Huo
%A Y F ZhangF Mnami
%A <br>H Y Jing
%A L.X. Huo and Y. F. Zhang
%J 金属学报(英文版)
%D 1999
%I 
%X A 3-D computationalframework was suggested to model stable growth of a macroscopic crack under model I condition. The Gurson-Tverpaaof dilatant plasticity model for voided materials describes the damage process. Fixed-sized, computational cell elements (containing voids) defined over a thin layer at the cmck plane simulate the ductile crack extension. Outside of this layer, the material remains undamaged by the void growth. The micro-mechanics parumeters controlling cmck growth are the thickness Of computational cell layen D, and the initial void porosity, fo. These parameters are calculated through analyses of ductile tearing to match R-curve obtained from testing of deep notch bend specimens for welded joints. The R-curve for the double edge notched tension specimens is eNctively predicted using these pammeters.The predicted R-curve gives a good agreement with the expemment results.
%K ductile crack growth
%K R-curve
%K computational cell model<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=CFF40BD0F3D291323F739E19590C52D6&yid=B914830F5B1D1078&vid=59906B3B2830C2C5&iid=B31275AF3241DB2D&sid=FD947B5A26542F64&eid=4AECDC3329847C4A&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=4