Dear all,

I have two questions related to using prony series to represent viscoelastic behavior of composites.

1. Now I have the relaxation modulus master curve, and I want to use Prony series to fit the curve. I need to determine both relaxation times and Prony coefficients, right? If so, I am going to to use Levenberg-Marquardt algorithm to do the job, please let me know if you have any other suggestions.

2. My composites model only contains single elastic fiber and viscoelastic matrix. If I already have the Prony series for the matrix, and I obtained master curve for my model using micromechanics model. Should I use the same relaxation times in matrix to find the prony coefficients for the composites model?

I am new to this field. Any comments and suggestions would be highly appreciated.

Thanks