Singular strain function

hiranwale_bharat
hiranwale_bharat Altair Community Member
edited October 2020 in Community Q&A

Hello Everyone,

 

I am trying to define a material by using Mathe card with stress stretch curve defined for tensile load.(in first quadrant).

 

I am getting an error saying ' CHEX element no. 123 has singular strain function.Please check material data.'

 

Can anyone tell me why this happened? Is there any remedy for this? Should i define my material curve with more no. of points?

 

Regards,

Bharat

 

 

 

 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2016

    Hi Bharat,

     

    Can you share the entire .out file with us?

  • hiranwale_bharat
    hiranwale_bharat Altair Community Member
    edited March 2016

    Sorry prakash,

    I can't share the file directly to you. But I will update it tomorrow.

     

    regards,

    Bharat

  • hiranwale_bharat
    hiranwale_bharat Altair Community Member
    edited March 2016

    Hello Prakash,

     

    Sorry for late reply.

     

    As I said previously, I can't share the .out file, but please find the sna[ taken of it with this message. Hope it helps.

     

    Thanks and regards,

    Bharat

    <?xml version="1.0" encoding="UTF-8"?>IMG_20160319_122201.jpg

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited March 2016

    Hi,

    Send me the MATHE and TABLES1 card details from the deck

    Regards

    Rahul R

  • hiranwale_bharat
    hiranwale_bharat Altair Community Member
    edited November 2020

    Hello Rahul,

     

    Please find attached excel file for your perusal. 

     

    It is Stretch stress curve.

     

    Regards,

    Bharat

    Unable to find an attachment - read this blog

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2016

    Hi Bharat,

     

    is it a true stress strain curve or a Engineering stress strain curve?

     

  • hiranwale_bharat
    hiranwale_bharat Altair Community Member
    edited March 2016

    Hello Prakash,

     

    it is true curve.

     

    Regards,

    Bharat

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2016

    Hi Bharat,

     

    The error points to a single element, I believe and its a combination of material model and mesh size.

     

    Can you remesh that particular element (element ID 343, increase the size of the element) in your model and try again.

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited March 2016

    Hi,

    Can you please add the below Debug card and re-run the job

     

    DEBUG,HEPPPRTC,1

     

    Please send me the .out file after running with this card

    Regards

    Rahul R

  • hiranwale_bharat
    hiranwale_bharat Altair Community Member
    edited April 2016

    Hello Rahul,

     

    Sorry for such a late reply.

     

    I tried the Debug command on a different model which was giving same error ,but no use. I even tried changing that particular elements length , but that did not help either.

     

    Thanks And regards,

    Bharat

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited April 2016

    You can try specifying only C10 value as 0.36, NA as ‘1’ and remove the TABLES1 card from MATHE card

     

    Regards

    Rahul R

  • hiranwale_bharat
    hiranwale_bharat Altair Community Member
    edited April 2016

    Hello Rahul.

     

    I tried as per your instructions.

    Run was complete but results are not as I had expected. Disp. Is 3 times higher than actual diap.

     

    Thank you and regards

    Bharat

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