ERROR: Element quality check

Unknown
Unknown
edited October 2020 in Community Q&A

Hi all,

 

I have a problem regarding the Optistruct Element quality.

 

 Element # 6837, element type QUAD4.

 ERROR - Validity limit violation: Vertex Angle =    297.45   

         upper limit =    180.00

 

i run a bead optimization and although I use the card 

 

PARAM,CHECKEL,NO

 

it seems to make the element quality check and show the ERROR. 

 

 

Can you help me what is wrong with my mesh. To me it seemes to be a regular mesh.

 

Thanks,

 

Uroš

<?xml version="1.0" encoding="UTF-8"?>help1.PNG

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Answers

  • tinh
    tinh Altair Community Member
    edited July 2017

    Hi,

    Send us your model please.

    Could you check quality F10>2d > quad max angle ?

    if it is failed. delete the element and re-create

  • Unknown
    Unknown
    edited November 2020

    Hi tinh,

     

    thanks for a quick reply and help.

     

    I checked the quality and it shows max angle 127.83, and in the error it is measured to be 297.45

     

    Please find both the .fem file and the print scree in the attachment. 

     

    Thanks, in advanced,

     

     

    <?xml version="1.0" encoding="UTF-8"?>help2.PNG

    Unable to find an attachment - read this blog

  • tinh
    tinh Altair Community Member
    edited July 2017

    Hi,

    It seems that angle error caused by optistruct while moving nodes

    I am not sure whether a parameter control this or not.

    could you try refine your mesh?

    or split all quads to trias?

    I see your draw height is to big, try with smaller value

    and if bottom is fixed, activate boundary skip

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