MBD analysis error by flexible bodies

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

Hi,

 

As soon as I change in an MDB analysis the body properties from rigid to flexible, I got error messages.

 

I uploded my example models to:   https://ftin.india.altair.com:8443/filedrop/

 

test_zusammenbau_zyl_2_rbody.fem : all rigids, it's OK

 

test_zusammenbau_zyl_2_fbody_1.fem:   $HMNAME GROUP                  1'kolben' 'PFBODY', with error

 

test_zusammenbau_zyl_2_fbody_3.fem     $HMNAME GROUP                  4'pleuel' 'PFBODY'

                                                                     $HMNAME GROUP                  3'hebel' 'PFBODY',  with error

 

 

Thank you and best regards,

 

Szilard Balazs

 

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2015

    Hi,

     

    The problem is with the tetra elements. It may not be possible to get corner stress for tria/tetra elements.

     

    Change it to  center instead and you should be able to run the model.

     

    My suggestion would be use QUAD/HEXA elements instead of tria/tetra elements and request corner stress.

     

    Thanks and Regards

     

    Prakash Pagadala | Altair Engineering

     

     

     

     

    An another thing is, that each MDB analysis must to run in a separate directory...

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited February 2015

    Thanks for posting the answer image/emoticons/default_smile.png' alt=':)' srcset='/emoticons/smile@2x.png 2x' width='20' height='20'>

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