From Section 4.11.3 of the MAPDL Material Reference Guide (R2023-R2), with regards to Mohr-Coulomb:Â "... After the material yields, the inner friction angle 
, cohesion 
, and tensile strength 
 harden or soften as a function of the Mohr-Coulomb and tension hardening variables, 
 and 
. "
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