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I have to agree that the questions make no sense... The beauty of Opensees (and open source codes in general) is, that gives you the option to easily create something if it's not there :). As I can understand from the context is, that in some similar software you define the lumped macro models with ...

Hello, There are numerous hyperelastic nd-material models in the source code repository (neo-hookian, mooney, ogden...), however I can't seem to compile/define them as they require few "tensor" operators and different matrix vectors definitions. They have been introduced in 2003 version or...

Hi,

in my experience getting such close result for different models in initial modulus terms is quite impressive (I assume initial material moduli are different). Compare pushover curves instead as indirectly suggested by fmk.

regards