Problem by model checker" negative or zero colume of solids"

Chen wsh
Chen wsh Altair Community Member
edited October 2020 in Community Q&A

Hi,

I'm doing a simple compression test of this stent model as shown in the attachment. 

As it is cylindrically pressed, so I built a new cylindrical system. And I set up IMPDIS. However by MODELCHECKER it showed 'negative or zero volment of solids'.

 

I'm wondering if the parameters of the card PSOLID correct or not？

Or due to the meshing problem?

 

Any other reasons might cause this error?

 

Regards

Chen

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Answers

  • Simon Križnik
    Simon Križnik Altair Community Member
    edited July 2020

    Hi,

     

    this modelchecker error indicates badly shaped 3D element (meshing issue). The solid is decomposed into sub-volumes associated to each integration point.  If the element is badly warped, one sub-volume could be negative.

     

    Check your element quality.

    Tool > check elems > 3D > aspect, jacobian, warpage, tet collapse

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