how to create the valid spot?

Heng Gao
Heng Gao Altair Community Member
edited October 2022 in Community Q&A

hi friend,

I am trying to make a bottom crash analysis, but after radioss finished, I find that the spot didn't work, the components that should be weld together directly broke, I create it in 1D - connectors - spot , and I choose the spot type is type2 spring. could you help to figure out where is wrong? I attached the math as attachment.

thank you,

Heng Gao

 

image

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Best Answer

  • PaulAltair
    PaulAltair
    Altair Employee
    edited October 2022 Answer ✓

    You have failure displacements set on the welds of +/- 1.25mm so they are working as expected I think, if you don't want them to fail, you can remove the failure criteria, you hadn't included your engine file, so I guessed! With the one attached, you can see the welds unzipping as they reach the specified failure criteria

    image

    image

Answers

  • PaulAltair
    PaulAltair
    Altair Employee
    edited October 2022 Answer ✓

    You have failure displacements set on the welds of +/- 1.25mm so they are working as expected I think, if you don't want them to fail, you can remove the failure criteria, you hadn't included your engine file, so I guessed! With the one attached, you can see the welds unzipping as they reach the specified failure criteria

    image

    image

  • Heng Gao
    Heng Gao Altair Community Member
    edited October 2022
    Paul Sharp_21301 said:

    You have failure displacements set on the welds of +/- 1.25mm so they are working as expected I think, if you don't want them to fail, you can remove the failure criteria, you hadn't included your engine file, so I guessed! With the one attached, you can see the welds unzipping as they reach the specified failure criteria

    image

    image

    thank you Paul! 

    I updated it per your suggestion, it works. 

    thank you for your help~

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