%0 Journal Article
%T FRACTURE TOUGHNESS TEST BY IMPACT-FATIGUE METHOD<br>
%A Yang Zheng
%A <br>
%J 金属学报
%D 1978
%I 
%X The crack tip stress intensity factor under impact-fatigue conditions expressed by the equation K_I=(AE/BW)~(1/2)·F(a/W) may be used as a measure of fracture toughness of materials on condition that a proper calibration of K_I with the compliance measurements is made. The fracture toughness values obtained by the above method are equivalent to the dynamic fracture toughness K_(Id) with loading rate of the order (?)=10~5kg/mm~(3/2)/sec, and would be valid as the critical crack length of the fracture surface of specimens are constrained within the range of a/W=0.36-0.6.The above method is simple and convenient for testing fracture toughness of materials. The testing results may be obtained directly from a ready made curve provided that the critical crack length on fracture surface has been predetermined. It can be recommended as a screen method in practical work.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=1875E42A0FDC2D29961D85383B785B4C&yid=EA437CDB73D9759D&vid=F3583C8E78166B9E&iid=E158A972A605785F&sid=0493D643315CD829&eid=3FC4D669D19FF0C6&journal_id=0412-1961&journal_name=金属学报&referenced_num=1&reference_num=3