Abaqus or Ansys

[trajmarina]

I have to implement a new constitutive relation in a commercial FE code. Can somebody help me with the tips: which of them (Abaqur or Ansys) is better and easier for programing?

 

[xerf]

You can code the constitutive response in ABAQUS using Fortran subroutines (namely the UMAT subroutine, which is described in the ABAQUS documentation).

 

[prost]

You can also code constitutive relationships in more than one stress-strain metric (Euler, Lagrange, etc.) in ADINA, also in Fortran I think. 10 years ago that was my doctoral project--nonlinear viscoelastic constitutive equations, and I used ADINA.

 

[cbrn]

Hi,
every hi-end FE program will allow you to do so. It is possible also in Ansys (I mention it only because it wasn't named by the previous posters). I'd suggest to choose the hi-end FE system for which YOU are more familiar with.

Regards

 

[trajmarina]

Thank you very much for your hints. I am more familiar with ANSYS but I have used it just for modeling not for programing. As I have understood well for both of them I have to use Fortran? The theory that has to be programed is already difficult so I want to make a good choice for the program to avoid additional problems.

 

[Mech151]

You may consider calling external programs from your FEA code (mathcad, etc).