Hi
These values are only used I believe for calculating failure criteria such as say Tsai-Wu etc.
See the help manual:
’This data table defines the strength limits and other related constants required for computing failure criteria (FC) index of a material under various loading conditions'
See an example on that and how they are used for FC:
https://courses.ansys.com/index.php/courses/modal-analysis-of-a-monocoque/lessons/pre-analysis-start-up-lesson-2-19/
Thank you
Erik