[Tochnog-users] a lot difference with different mesh

[t***@lists.sourceforge.net]

Hi,

I'm using tochnog to simulate a simple shear band problem with a
prescribed imperfection. But I got very different results using
different meshes (tria3 and quad4). What causes the problem? Is there
any specialty using quad element? Attached are two data files.

Regards!
Ning

[t***@lists.sourceforge.net]

Hi, this is an effect I realized some time ago. It happens either in elastic or inelastic analisys. I can show some .dat files with this issue. 

Best,


Enviado de Samsung Mobile

tochnog-***@lists.sourceforge.net escribió:

Hi,

I'm using tochnog to simulate a simple shear band problem with a
prescribed imperfection. But I got very different results using
different meshes (tria3 and quad4). What causes the problem? Is there
any specialty using quad element? Attached are two data files.

Regards!
Ning

[t***@lists.sourceforge.net]

Hi,
I am attaching copies of a simple cantilever beam with both, Triangles and Quadrilaterals that produce basically the same results using the Total formulation. I will be running the same problem using the updated formulation later for comparison purposes. It appears to work fine.

One thing that makes a difference is the number of iterations. That is the reason why I like to set the iterations to automatic and setting the error in the calculations.

Jose can you post your examples please?

Best regards,

Fernando Lorenzo
Re: [Tochnog-users] a lot difference with different mesh
Exclude From: <tochnog-***@li...> - 2011-11-26 17:24
Hi, this is an effect I realized some time ago. It happens either in elastic or inelastic analisys. I can show some .dat files with this issue.

Best,


Enviado de Samsung Mobile

tochnog-***@... escribió:

Hi,

I'm using tochnog to simulate a simple shear band problem with a
prescribed imperfection. But I got very different results using
different meshes (tria3 and quad4). What causes the problem? Is there
any specialty using quad element? Attached are two data files.

Regards!
Ning