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Stress Relaxation curve fit for Prony series for viscoelastic material

- November 7, 2021 at 11:22 pm
  
  far29
  Subscriber
  
  Hello,
  I am trying to model viscoelastic material for arteries using Prony series.
  I have a stress relaxation curve. Once I input the shear modulus vs time data, how do I generate the prony coefficients?
  
  Thanks
- November 8, 2021 at 1:43 am
  
  David Mercier
  Ansys Employee
  
  Hi, why not applying the following method: https://www.researchgate.net/publication/266679671_Interconversion_between_viscoelastic_functions_using_the_Tikhonov_regularisation_method_and_its_comparison_with_approximate_techniques
- November 15, 2021 at 2:45 am
  
  far29
  Subscriber
  
  I was hoping there was a way to generate the coefficients from my data on ANSYS ?
- November 15, 2021 at 9:09 am
  
  David Mercier
  Ansys Employee
  
  maybe have a look into this discussion:
  /forum/discussion/2206/alternative-to-curve-fit-prony
  /forum/discussion/26988/in-prony-shear-relaxation-model-what-is-relative-moduli
  /forum/discussion/22274/viscoelasticity-modal-curve-fitting-of-prony-shear-relaxation

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