excessive distortion

[afefdridi]

Hello everybody please i would like to simulate an hyperelastic material stretching to a stainless steel archwire ( attached picture) i have always execessive distortion can anyone help me to sole this problem. I AM WORKING WITH ABAQUS STANDARD.
thanks a lot

 

[corus]

I'd advise that you didn't use tetrahedral elements for this kind of geometry which can be readily meshed using a swept mesh for brick type elements. Generally the results you get are much better and avoid these kind of errors.

 

[afefdridi]

Hello
thanks corus for your response but i tried to do sweep meshes i can not do it. It does not accept only tetr elements.

 

[DrBwts]

I second what corus said. In CAE have a look at the mesh control and change it to 'hex dominant' & then rerun.

 

[afefdridi]

hi as I said when i would like to chang there is a mesag tthat says that i can not use it only i can use tetrahedrical element

 

[fauzi2015]

by my experience, this excessive distortion prob can be reduced/eliminates by

1) first of all, u can see which node causing the problems by referring to job diagnostic(under visualization>tools)
2) try re-mesh the model, i would like to suggest to start from coarse to fine mesh,
3) somehow you have to play around with the increment time, automatic incrementation is good for early observation. later on, fixed is the best