Modeling Residual Stresses with the Advanced Model Interface
James Harter presentation at AFGROW Workshop 2019.
A few issues were discovered in the 2-D Gaussian integration method used for the residual stress correction capability in AFGROW. An error was found in the Newton Interpolation calculations, and the part-through crack correction was not being used correctly for application to 2-D cracks. In addition, the residual stress analysis capability was not available for use with the Advanced Model Interface until release 5.3.3.23. The Fawaz/Andersson corner cracked hole solutions available in the Advanced Model Interface have been shown to be more accurate than the Classic Newman-Raju solutions. Therefore, the ability to use this capability in the Advanced Model Interface would be expected to provide more accurate life predictions for cases with a known residual stress field. This presentation will review the changes made to the residual stress capability and demonstrate the use of the updated analysis capability to predict the life of one of the cold-worked corner cracked hole geometries that was part of a recent ERSI test/analysis effort.