Capability Growth 

Recent Enhancements

Recent enhancements in the current version 11.2 include:

• Superposition methods to combine time-dependent and cyclic crack growth (da/dt + da/dN)
• Advanced pairing of stress and temperature for thermomechanical fatigue crack growth
• New K solution for embedded crack in a round bar
• Expansion of countersunk hole K solution to include corner crack at faying surface
• Addition of optional constraint conditions for corner crack K solution in L-section
• Addition of bearing pin load to through crack and corner crack at offset hole with broken ligament K solutions

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

Recent Publications

• “OSMA Continues Development of NASGRO Software for Fitness-for-Service Analyses of Ground-Based Pressure Systems” was posted in March 2026 on the NASA Office of Safety and Mission Assurance website at https://sma.nasa.gov/news/articles.
• The 2025 SwRI report entitled “Fitness-For-Service Assessments of Crack-Like Flaws Using NASGRO” has been published as a NASA contractor report (NASA/CR-20250011200) at https://ntrs.nasa.gov/citations/20250011200.

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 12.0 include:

• New K solution for a corner crack in C-section
• New K solution for corner crack in web of T-section
• New K solution for corner crack growing between two unequal holes
• New through-wall crack transition K solutions for surface cracks in a cylinder and a sphere
• Expansion of bivariant weight function (WF) K solution for corner crack at hole to include out-of-plane bending
• Failure assessment diagram (FAD) capability for curved through-thickness cracks
• Expansion of spectrum input and editing features for time- and temperature-dependent crack growth
• Option to decouple toughness and high cycle failure from growth rate calculation

Plans for future versions include:

• Improve NASGRO installation process
• Approximate (compounding) method for multi-site damage
• Ability to call NASGRO directly from another user program
• More improvements to EPFM module and documentation
• Additional K solutions for other unique geometries

CONTACT US

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