Add anisotrope drucker prager criteria #51
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Expanded and clarified Doxygen comments for functions related to stress invariants (J2, J3), Drucker-type anisotropic criteria, and configurational tensor construction. Added detailed mathematical definitions, usage notes, and code examples for better developer understanding. Removed redundant brief comments and improved consistency in parameter descriptions.
Renamed functions and references from Drucker_anisotrope_stress and dDrucker_anisotrope_stress to Drucker_ani_stress and dDrucker_ani_stress, respectively, in both headers and source files. Updated all usages in the SMA anisotropic UMAT implementation to match the new function names for consistency and improved readability.
chemiskyy
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Jan 23, 2026
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This PR adds a new anisotropic criteria, and correct the derivative of the existing Drucker model.
everything seems consistent, well done
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Add a new shape memory alloy UMAT, named SMANI, to model the anisotropic behavior of architectured cells using a criteria based on Drucker Prager criteria and DFA criteria.