For the hyperelastic material, you consider any material model such as Neo Hookean etc. nFor example you insert uniaxial test data into Neo Hookean and then you plot curve fitting of stress vs strain to get Neo Hookean constants.nAnd for viscoelastic Model, you consider for example prony relaxation data (which you have to calculate yourself and then you insert these data into prony relaxation data Section)nAre you only considering viscoelastic behaviour for your model?n