A general framework to develop material models (UMAT) in ABAQUS (Dassault Systèmes)
Home Page: https://jpsferreira.github.io/UMAT-ABAQUS/
License: GNU General Public License v3.0
[João Ferreira]
Hi there 👋
I'm a Researcher in Biomechanics and Invited Assistant Professor at the University of Porto. I am also Head of Data at DigestAID. I enjoy surfing, running, hiking, climbing, and playing video and board games in my free time.
Not many people may have noticed this program, but I have been recommending it to people around me, especially for beginning students.
This is nice work. I have a question: do you know why the variable SSE in UMAT is defined (in the Abaqus documentation) to be "SPECIFIC elastic strain energy"? Your UMAT code (umat_general.for) suggests that SSE has units of energy per unit (reference) volume, but "specific" means per unit mass. I am guessing SPD would have the same units as SSE? Do you know whether the Abaqus documentation is incorrect?
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