%0 Journal Article
%T A J-INTEGRAL ANALYSIS OF CRACKS IN OVERMATCHED WELDED JOINTS<br>高匹配焊接接头裂纹的J积分研究
%A MA Weidian
%A ZHANG Shicheng
%A TIAN Xitang Qinghua University
%A Harbin Institute of TechnologyDept of Mechanical Engineering
%A Qinghua University
%A Beijing
%A <br>马维甸
%A 张式程
%A 田锡唐
%J 金属学报
%D 1988
%I 
%X The effects of material inhomogenity and weld width of the over- matched welded joints with a longitudinal crack or flaw upon the J-integral, a charac- terizing parameter for elastoplastic fracture, have been studied. The overmatched weld is idealized to be a parallelly cracked and sandwiched hard layer, the yield stress of which is higher than that of the base metal. Numerical solutions were ob- tained by using elastoplastic finite element method under the assumption of plane stress. The results show that the values of J-integral are remarkably affected by the mate- rial inhomogenity and the weld width especially when the nominal stress or nominal strain is comparatively high, which, therefore, should be taken into account when evaluating the crack driving force for a overmatched joint.
%K welded joint
%K crack
%K J-integral<br>焊接接头
%K 裂纹
%K J积分
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=17FA6154DC9E176C52E8F266D8B9AB98&yid=0702FE8EC3581E51&vid=B91E8C6D6FE990DB&iid=E158A972A605785F&sid=556C1A86E372B606&eid=15251AE9C02726D3&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=1