THREE-DIMENSIONAL FEM ANALYSIS OF STRESS-INTENSITY FACTOR IN PETROLEUM DRILL PIPE JOINT WITH SURFACE CRACK Ⅱ.SEMI-ELLIPTICAL SURFACE CRACK AT THE ROOT OF NUT SCREW
Zhao Hua1, Li Zhonghua1, Kuang Zhenbang1, Zhang Yi2, Li Helin2
1. Xi'an Jiaotong University; 2. Baoji Petroleum Tubing Research Centre
Zhao Hua, Li Zhonghua, Kuang Zhenbang, Zhang Yi, Li Helin. THREE-DIMENSIONAL FEM ANALYSIS OF STRESS-INTENSITY FACTOR IN PETROLEUM DRILL PIPE JOINT WITH SURFACE CRACK Ⅱ.SEMI-ELLIPTICAL SURFACE CRACK AT THE ROOT OF NUT SCREW[J]. Editorial office of ACTA PETROLEI SINICA, 1992, 13(S1): 191-202.