Advanced science.  Applied technology.


What's New in NASGRO

Capability Growth. NASGRO is always growing and improving. We have a large development team (about ten people at SwRI or NASA) and a large development and support budget (totaling about $2M per year). A new NASGRO production version is released about once each year. Our large user base (thousands of users worldwide) provides suggestions for new features and helps us to identify and resolve bugs. 

Recent Enhancements. Recent enhancements in the current version 9.2 include:

  • New weight function K solution for external surface crack in hollow cylinder
  • New weight function K solution for surface crack in solid cylinder
  • New bivariant weight function K solution for crack at angled corner
  • End bending restraint option added to several edge through crack solutions
  • Partial bending restraint options added to structural section through crack solutions
  • New thread restraint option for circumferential surface crack in threaded solid cylinder
  • Improved bending solution for surface crack in bolt head fillet
  • Expanded solution limits for numerous K solutions
  • New NASFAD module for Failure Assessment Diagram calculations
  • Graphical user interface upgraded to allow dynamic resizing of display windows

A PDF flyer describing the current version can be downloaded here.

Previous Versions. Summaries of new features and enhancements in previous versions are available in the release notes for each version.

Future Development. Major new features planned for version 10.0 include:

  • New K solution for identical corner cracks at a row of identical holes
  • New K solution for through crack between two unequal holes in an infinite plate
  • New K solution for through crack at a hole with an interference fit fastener
  • New K solution for through crack in a T-section
  • New K solution for corner crack at knee of countersunk hole
  • New weight function K solution for external surface crack in a sphere

Plans for future versions include:

  • Additional K solutions for curved through cracks
  • Superposition methods for time-dependent crack growth
  • K solutions for lugs and pin-loaded holes with interference or clearance fit
  • Approximate (compounding) method for multi-site damage
  • Additional K solutions for other unique geometries


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