Re: [Getfem-users] manually set deformation beforecompute_tangent_matrix

[Nico Galoppo]

Thanks, that's great!

On a side note, I've found that gf_asm() doesn't support non-linear
StVK materials. (That's why I wasn't using it).

On Jan 4, 2008 10:21 AM, Julien Pommier <address@hidden> wrote:
> Hi,
>
> I think you should be able to do everything you need with the "lower level"
> assembly functions instead of bricks (using gf_asm('nonlinear elasticity',..))
>
> But as it is not a lot of work, I just committed a patch which adds an
> "gf_mdstate_set" function for the interface:
>
> http://svn.gna.org/viewcvs/getfem?rev=2734&view=rev
>
> (However, please note that I did not check it on matlab, I just did a quick 
> test
> on python)
>
> Julien
>
>
> Quoting Igor Peterlik <address@hidden>:
>
> >
> > Hello,
> >
> > we have been running to the same problem with the Matlab interface.
> >
> > More precisely, we utilize GetFEM for assembling the stiffness and
> > tangent stiffness matrices using non-linear incompressible brick, but
> > we want to solve the system with Matlab fsolve.
> > Therefore,  in each iteration of fsolve we need to
> > (a) set the actual estimation of the displacement  vector (model state
> > vector)
> > (b) call the assembling procedure
> > (c) retrive the actual assembled residual and tangent matrix
> >
> > Both (b) and (c) are clear, since there are corresponding matlab interfaces,
> > however, there is no interface for doing (a) and we are not capable to add
> > this
> > functionality to the interface by ourselves.
> > So, is there any other way how to do this or is it a feature that should be
> > implemented in future release?
> >
> >                               Thank you
> >
> >                                                                    Igor
> >
> >
> >
> > _______________________________________________
> > Getfem-users mailing list
> > address@hidden
> > https://mail.gna.org/listinfo/getfem-users
> >
>
>
>
>
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-- 
Nico Galoppo :: http://www.ngaloppo.org