I am trying to simulate a dynamic three point bending experiment in Abaqus, but first, I'm trying to make it work in static. I have done several tests in tension, bending, DMA, stress relaxation.
My material looks like this:
Hyperelastic, Ogden model, n=3, uniaxial test data
Viscoelastic, Frequency, Tabular
Viscoelastic, Time, Shear Relaxation test data
I have also done several static simulations (step=visco) with these viscoelastic material models at different strain rates. Although the relaxation based material differs from the DMA based material, the strain-rate has no influence on the DMA material.
My questions are:
1) I have several DMA material models, for different types of tests and different amplitudes. Why is my material behaviour identical, regardless of the input data? (I used data for 0.1Hz, 1Hz, 10Hz and 100Hz in one case)
2) Why aren't the DMA material models influenced by strain rate, as the stress relaxation model is?
3) Can Abaqus/explicit determine strain-rate influenced results, as the "visco" step?