Using fracture mechanism maps to predict time-dependent crack growth behavior under dwell conditions

摘要

A computing system for predicting crack growth behavior includes technologies to predict a time-dependent crack growth mechanism in a manufactured component once a crack has been initiated in the component. The computing system generates one or more time-dependent fracture mechanism maps for the component and uses the fracture mechanism maps to determine a modified dwell transition temperature for the component. The system predicts a crack growth mechanism based on the modified dwell transition temperature and a mission-specific temperature to which the component may be subjected. Based on the predicted crack growth mechanism, the system can estimate the cyclic life or the remaining life of the component. The life prediction and/or other output of the system can be used to assess the component for a turbine engine application; for example, to modify the design, material selection, and/or maintenance plan for the component.