Hi,
the formula for the Eulerian strain in the manual is unfortunately wrong, the second term should have -3/2 instead of -1/2. So the Eulerian strain is not as close to the logarithmic strain as I had hoped for.
I took this opportunity to change the formulation in CalculiX for deformation plasticity from Eulerian strain to logarithmic strain, as in Abaqus. Will be available in the next CalculiX version (summer 2023).
Best Greetings,
Guido