Hello Yves,
thank you for your answer.
I'm afraid I'm not into the topic weak form language and I'm not sure
where to start with this problem.
I looked at the chapter in the documentation, however I don't know how to
describe a plane stress material model with it.
I also studied the examples, that come with the MATLAB-Interface. There
are a few examples, how to declare a material model with this weak form
expressions. But I still don't know, how to build this expressions.
Can you give me a approach for this problem or where I can find
expressions for such a problem? Is there any literature that you can
recommend?
Best regards,
Moritz
Von: Yves Renard <yves.ren...@insa-lyon.fr>
An: Moritz Jena <moritz.j...@scherdel.com>
Kopie: getfem-users <getfem-users@nongnu.org>
Datum: 09.01.2019 17:17
Betreff: Re: [Getfem-users] 2D nonlinear plane stress
Dear Moritz Jena,
No, unfortunately, plane stress versions of Hyperelastic laws has not been
implemented yet.
I would not be so difficult, but as to be made. If you need one in
particular and have the expression, it is no so difficult to describe it
with the weak form language.
Best regards,
Yves
----- Original Message -----
From: "Moritz Jena" <moritz.j...@scherdel.com>
To: "getfem-users" <getfem-users@nongnu.org>
Sent: Tuesday, January 8, 2019 4:11:48 PM
Subject: [Getfem-users] 2D nonlinear plane stress
Dear GetFEM-Users,
I use the MATLAB-Interface of GetFEM to create a program that
automatically solves different models of the same problem.
The problem is three-dimensional, but can be reduced by plain stress
approximation. (to reduce computing time).
I want to define a nonlinear material with the brick
gf_model_set(model M, 'add nonlinear elasticity brick',
[...])
For this nonlinear command it is specified in the description, that in 2D
always plain strain is used.
So my question is: Is there a way to define a nonlinear material with the
plain stress approximation? Or is it planned to install such an option in
a future release?
I hope you can help me with my problem.
Best regards,
Moritz Jena
