Learning Forum

[weilinhu]

i am trying to get prony shear relaxation from shear shear data. There is a trouble. The curve fits well in CURVE FITTING. However, after copying calculated values to property, curve fits badly in PRONY SHEAR RELAXATION. I don't konw why. And when I solve the result, there is no difference between isotropic elastic and viscoelastic solution.

[HarsihilZLHZ]

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

[weilinhu]

Hi, HarsihilZLHZnyes, I only consider viscoelastic behavior of materials.n

[HarsihilZLHZ]

if possible share your model nif not thennwith prony shear relaxation data you dont required to do curve fiitingnn

[weilinhu]

Harsihil,nyou may don't understand me. WORKBENCH can get prony shear relaxation data through fitting Experimentally measured shear data.n

[HarsihilZLHZ]

Ok I got it nI thought ANSYS cannot calculate Prony relaxation data.nI have calculated Prony relaxation data externally.n

[HarsihilZLHZ]

other then this what other material properties have you considered?n

[weilinhu]

Harsihil,nofcurse, like young's modulus and poissson's ratio. You can seenn