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what is the reason for Large element deformation?

what is the reason for Large element deformation?

what is the reason for Large element deformation?

(OP)
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

RE: what is the reason for Large element deformation?

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

RE: what is the reason for Large element deformation?

(OP)
Hi Corus,

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

RE: what is the reason for Large element deformation?

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.

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