Hyperelastic + viscoelastic model

Altair Forum User

Hello,

 

I'm trying to modelize a rubber material. I want to define his hyperelasticity with stress-strain curve and his viscoelatic behavior with Prony series computed with Abaqus but I can't find how to do that.

Law 69 allows us to define hyperelasticty but not viscoelasticity.

Law 42 allows us to define a Prony model with an hyperlastic model but only with paramater that I don't have (Mu, alpha).

 

Is it possible to define my material with stress-strain curve coupled to prony series ?

 

Thank you for your answers.

 

Benjamin

Altair Forum User

HI Benjamin,

From RADIOSS 2017 version Visco-Elastic Law is supported in LAW69. To reproduce viscosity in LAW69, add /VISC/PRONY card.

From HyperCrash, you may not be able to select the material for this card. For that, export the file and manually input the /VISC/PRONY card and select the material id for LAW69(Edit the deck file in Textpad and input the material id). Please see the image below.
 

Please go through /VISC/PRONY card in Help Menu also.
<?xml version="1.0" encoding="UTF-8"?>