Zienkiewicz-Zhu Stress Error Norm

Hello Victor Marian,

These error norms are only available for continuum elements supporting "local adaptive meshing". The error norm evaluates the difference between the calculated integration point quantity (eg. σ) and the smoothed nodal quantity interpolated back to the integration points (eg. σ* = N σN). 

Use local adaptive meshing in your 3D model. You should be able to get the value of Zienkiewicz-Zhu Stress Error Norm scalar as shown in below image,

Regards,

Kiran

Hello Victor Marian,

These error norms are only available for continuum elements supporting "local adaptive meshing". The error norm evaluates the difference between the calculated integration point quantity (eg. σ) and the smoothed nodal quantity interpolated back to the integration points (eg. σ* = N σN). 

Use local adaptive meshing in your 3D model. You should be able to get the value of Zienkiewicz-Zhu Stress Error Norm scalar as shown in below image,

Regards,

Kiran

Thank you for your answer. But normally the stress error norm can be computed on a mesh without adaptivity. It is based on the difference between the interpolated and the finite element solution. Why do you need adaptivity for this? One computation should be enough.

Hi Victor,

Technically it is possible, however in Marc the post codes 491-494 are supported only if local adaptive meshing to check the errors with meshing. 

Thank you for your help!