Abstract：The fatigue fracture of wing spar in type-X finhter is observed with scanning electron microscope. Both the crack propagation life and the amplitude of stress intersity factor are estimated with fatigue strition and Zheng-Hirt formula. The estimation is very close to the results of experiment. It is a useful attempt to study the service life of old fighters.
马康民, 宣建光, 康进兴. 30CrMnSi2A钢飞机主梁疲劳断裂分析[J]. 材料工程, 2001, 0(10): 42-44.
MA Kang-min, XUAN Jian-guang, KANG Jin-xing. An Analysis of Fatigue Crack of Wing Spar of 30CrMnSiNi2A. Journal of Materials Engineering, 2001, 0(10): 42-44.