Foams

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

Hi everyone,

 

Which value of LAW70 of foam should i input or increase or decrease to not get any energy problem under huge loads during run in RADIOSS?

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited December 2017

    Hi,

    I presume you are asking about the energy error.in the out file during the run. If the error is negative, it means that some energy has been dissipated (e.g. due to contact friction or hourglassing)  and If the error is positive, there is an energy creation.

    Energy error could be various reasons.  As a general remark, in case of under integrated, the Hourglass Energy can cause negative energy error. Also, any penetrations or intersections can also result in high energy error. Incompatible kinematic conditions can lead to high positive energy error.

    If you are getting high energy error in your model you can perform these checks in your model.

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