Hi all,

I am trying to model a material moel based on uniaxial compression and shear data. However, my material exhibits significant elastic rate dependent regime in uniaxial compression. What I did thus far, was just use an average value, and simulate my compression and shear experiment. However, the simulations are not performing well in shear (see image 1). What I did then I calculated from my shear modulus a new elastic modulus based on the poisson ratio, and repeated my shear simulation (worked better) and my compression, but the former's accuracy diminished. Could you please suggest different things I could try to accurattely simulate stress response in  both compression and shear using the same material model?

Black lines are model predictions and different colours different strain rates.

Any suggestions would be greatly appreciatedAbaqusAbaqusAbaqus Material Model