Discussion Groups

Simulation Mechanical and Multiphysics

28 Posts
13 Kudos
Registered: ‎06-01-2012

Nonlinear elastic materials

353 Views, 2 Replies
10-15-2012 04:21 AM

I plan to perform analyses for 'nonlinear elastic materials' (that are not rubber and/or elastomer) by using Autodesk Simulation 2013.
How to analyze nonlinear elastic materials by using stress-strain curves and Poisson's ration in MES analysis?  Is it possible for such analysis?


Best regards,

Akihiro Matsuda


8 Posts
1 Kudo
Registered: ‎05-06-2011

Re: Nonlinear elastic materials

10-15-2012 08:58 AM in reply to: amatsuda

Hi Akihiro,


Yes, you can do with Autodesk Simulation Mechanical 2013. 


If you have strain/stress curve of your elastic material, you can use curve-fitting function of hyperelastic or hyperfoam materials. This will estimate the coefficients of strain energy density function according to hyperelastic material model you choose. 


If you just have Young's Modulus and Poisson's ratio, then Neohooken is the good starting point to try. 


Good Luck!



28 Posts
13 Kudos
Registered: ‎06-01-2012

Re: Nonlinear elastic materials

10-15-2012 02:59 PM in reply to: Jaesung

Hi Jaesung,


Thanks quick reply!  I found some other FEM softwares that have 'nonlinear elastic model'.  These software's 'nonlinear elastic model' use both 'Stress-Strain curve' and poisson's ratio, without using strain energy density functions.
Anyway, I will try to solve my problem by using your recommendation scheme.


Thanks again!