Welcome to the forums. Please post in English or French.

You are not logged in.

#1 Code_Aster usage » Thermal strain damage model » 2019-07-06 10:14:50

Replies: 0

Hello everyone,

I am using the Mazars model in a damage analysis of a thermomechanical problem. Reading the official documentation of Code Aster I found out that thermal strain is not considered when evaluating damage, only the elastic strain is used. I would like to know if there is a physical or experimental reason for not taking it into account or it is simply to respect the original formulation of the model.

Thanks in advance.

#2 Re: Code_Aster usage » mazars problem » 2019-06-20 10:07:42


Did you find a solution to the convergence issue? I am having the same problem with Mazars.


#3 Re: Code_Aster usage » Convergence Mazars damage model » 2019-06-18 22:48:01


First of all, thank you for answering. Sorry for my generic question, Code Aster is something new for me.

I am uploading my .comm file, I will be very pleased if you could take a look and tell me where could my error be. My geometry is a simple box, with a good mesh, and I am blocking a face and trying to apply a weight force all over the solid. I don't really obtain an error from Code Aster, but the time step gets smaller and smaller, the simulation becomes eternal and doesn't converge. The weight I am using tries to be "soft" applied and it's not realistic at all, that's because I think something is wrong. This way I could not simulate any real problem!

Thanks in advance.

#4 Code_Aster usage » Convergence Mazars damage model » 2019-06-16 17:03:29

Replies: 2

Hi everyone,

I have to solve a thermomechanical problem with damage, using the Mazars model. I was able to solve separately the thermal part but convergence issues appear when trying to solve the mechanical one. If I add some load or displacement boundary conditions the errors start growing and the simulation diverges. This is due to the damage model, because I can carry out the same simulation perfectly well if I remove Mazars model and only do a thermomechanical simulation (without damage).

Has someone experimented this before? Are these convergence issues with damage models usual?

Thank you in advice,