CHARACTERIZATION OF CREEP CRACK GROWTH IN PRESSURE VESSEL STEELS.

In this paper, we summarize some recent results in which the process of creep crack growth rate is modeled using time-dependent finite element methods. To achieve this a general damage model is developed based on two material parameters - a critical effective strain for material failure and a characteristic propagation distance. The model is used to study crack propagation in 2 one quarter Cr-1 Mo steel. The crack growth rates obtained from …