Error in Element Deletion

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hallo Freinds,

I am analysing impact case with Radioss, here I am using composite material, therefore I have used M25_COMPSH material card image. In this card image I added the values of tensile failure strain in dir.1 and dir.2, in order to know which element will be deleted after impact, but after running simulation, simulation goes till some points very well but after sometimes error start increases and goes up to -99.9% and stay constant and simulation keep running. What does it mean? I need your help friends.

Thank You

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2017

    Hi Sanket,

    Negative Energy Error represents the energy dissipated from the system.  This can be damping from many sources including plastic deformation and hourglass energy.  If you are not expecting high plastic deformation in the problem, then hourglass energy can be a reason.

    Please find the image from our Help Menu.

    <?xml version="1.0" encoding="UTF-8"?>Capture1.PNG

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