【摘要】 使用相互作用积分法讨论了不同的裂纹初始角度对球形压力容器裂纹尖端的应力强度因子与J积分的影响。结果表明：在同一裂纹初始角度β下，Ⅰ型应力强度因子K_Ⅰ、Ⅱ型应力强度因子K_Ⅱ随着裂纹尺寸比2a/h的增大而增大；在不同的β下，K_Ⅰ、K_Ⅱ随着2a/h的变化趋势相同；当β增大时，K_Ⅰ增大，K_Ⅱ先增大后减小，J积分、等效应力强度因子K_e随之增大，且K_Ⅰ在K_e的变化规律中起决定作用。更多还原

【Abstract】 The interaction integral method is used to discuss the influence of different initial angles of cracks on the stress intensity factor at the crack tip of a spherical pressure vessel and J integral. The results show that under the same initial angle β, the type Ⅰ stress intensity factor K_Ⅰ,and the type Ⅱ stress intensity factor K_Ⅱ increases with the crack size ratio 2a/h;Under different β conditions, K_Ⅰ,K_Ⅱ increases with the 2a/h that trend of change is the same. When the initial angle β increases, the K_Ⅰ increases, and the K_Ⅱ firstly increases and then decreases, the J integral and the equivalent stress intensity factor Ke increases accordingly, and K_Ⅰ plays a decisive role in the variation pattern of K_e.更多还原