Hello,

I am defining my model as hyperelastic and viscoelastic in abaqus . I input my relaxation test data under viscoelasticity and my nominal stress strain data under hyperelasticity.

However I am able to input only one set of stress strain data at a particular strain rate i.e if I have 5 sets of stress strain data at different strain rates R1, R2, R3, R4 and R5. I only input R1 and the corresponding relaxation test data.

If I model a tensile test using this input I find that changing the strain rate does not reflect in any change in the output stress - strain plot. Since my material is strain rate sensitive in reality the stress strain relationship changes with strain rate.

I am interested to know how can I achieve the strain rate effect using the hyperelastic+viscoelastic model. 

Do I input all the sets of nominal stress - strain data one after the other along with relaxation test data.

thank you

Shouvik