Inquiry About Tangent Modulus Calculation in DAMASK 3.0.0.beta

[BenBettaieb]

Dear DAMASK Support Team,

I am a new user of DAMASK (version 3.0.0.beta) and have begun performing mechanical simulations using prescribed loading conditions (via F or dot_F). In my simulations, I successfully compute the first Piola-Kirchhoff stress tensor P incrementally.

To advance my analysis, I require the macroscopic tangent modulus dP/dF. Could you please clarify:

Whether DAMASK 3.0.0.beta provides direct access to this modulus (e.g., through output variables like C_ep or L_eff)?

If not natively supported, what would be the recommended approach to compute it (e.g., post-processing steps or numerical differentiation)?

I would greatly appreciate any guidance or references to relevant documentation.

Thank you for your time and assistance.

Best regards