Curve Fit Crack Growth Rate Data 07 January 2009 Tom-Deiters Life Prediction (0) (NASGRO 3 versus NASGRO 4?) The real question that needs to be asked is: where is the “dadN test data” upon which the NASGRO 3 and NASGRO 4 databases are based? I’ve heard arguments about the differences in the Forman equation for years now and believe we have become blinded... [More]