what is the reason for Large element deformation? 1

[Iskandarzade]

Hi my Friends,

I am doing abaqus run for a copper specimen under hydrostatic pressure. The magnetude of pressure is in order of several Giga Pascals. In my material definition, I have defined stress-strain flow up to strain of 0.4. But as you can see in attached photo, some elements show very large deformation (considerably larger than 0.4). Knowing that I have not defined stress strain behaviour for srain greater than 0.4, how this can be occure? Unfortunately, niether adaptive meshing nor element deletation were not eliminate this issue!!



Best Thanks

 

[corus]

Material properties above the maximum quoted are assumed to be constant.

 

[Iskandarzade]

Hi Corus,

Thank you for your information. Do you have any idea about how can I eliminate this unexpected large deformations at some elements?

 

[corus]

Your results appear to show odd nodal positions having very large deformations, together with large deformations at the centre. I'd suspect you've made a mistake in your model somewhere.