On the study of the creep damage development in circumferential notch specimens

Numerical calculations with K-R damage law have been performed to study the creep damage development in circular notch specimens under constant loading. The emphasis was placed on the roles of notch radius, material constant-α and applied stress. The results show that the distributions of stresses under creep conditions are different from those of previous studies. Creep damage development and life are different for different notch specimens, and the distributions of the maximum creep damage in the minimum cross-section vary with the notch radius. The creep damage is remarkably affected by the applied stress, material parameter-α and notch radius. Higher stress and tri-axial stress state parameter-α can cause the creep damage to develop faster.