The propagation lifetime of surface cracks can be forecasted by the Paris method. Due to the difficulty of crack detection and the complexity of crack propagation, it is difficult to forecast the propagation lifetime of actual embedded cracks. Here we present a methodology for forecasting crack propagation, whereby the workpiece containing the embedded crack is firstly scanned by industrial computed tomography (CT) to obtain its CT images, extracting crack edges with the Canny operator. Secondly, in order to fit crack boundaries that have a lar...
