%0 Journal Article
%T Effect of Specimen Size on J_R Resistance Curve of Ductile Materials<br>韧性材料J_R阻力曲线受试样尺寸因素影响的实验研究
%A Liu Yi Li Xiaowei
%A <br>刘毅
%A 李晓蔚
%A 陶学文
%J 实验力学
%D 1988
%I 
%X The effect of specimen size on the J_(Ic) and the slope of J_R curve (dJ/da) was studied by using three point bending (TPB)and side-grooved TPB specimens of different sizes. The results showed that J_(Ic) was affected insignificantly by specimen size when it is made according to national standard GB2038-80. On the other hand, dJ/da was affected to certain degree by the specimen size. Therefore, it is necessary to use larger specimens or side-grooved specimens to measure J_R curve when the stability of crack growth is evaluated on the basis of J_R-curve method.
%K J_R resistance curve
%K crack growth
%K fracture toughness<br>断裂韧性
%K 裂纹扩展
%K J_R
%K 阻力曲线
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=49067A0A0D864088C06A84AACB51A5B2&aid=EC4B3F86627DA435ABE3CF110C996482&yid=0702FE8EC3581E51&vid=38B194292C032A66&iid=38B194292C032A66&journal_id=1001-4888&journal_name=实验力学&referenced_num=0&reference_num=0