336 傾斜した厚板に取付けられた有限幅平板の表面き裂に対する応力拡大係数の評価手法(OS10-2 応力拡大係数,確率信頼性,OS10 エネルギー機器の経年変化に関する健全性評価手法の開発とその適用(1))

抄録

Evaluation methods of stress intensity factor for a surface crack in finite width plate attached to inclined thick plate were tested by FEM analyses and fatigue crack growth tests. The influence of crack depth and crack width on stress intensity factor was studied. From these tests following results were obtained. When a/t ratio equaled 0.5 or less and c/W ratio equaled 0.7 or less, stress intensity factor for a surface crack in finite width plate attached to inclined thick plate was evaluated conservative because of applying the function of finite width correction that had studied by Newman and Raju to an influence function method for flat plates with a surface crack.