Spot weld on very fine mesh

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

Hi,

 

I've tried to connect some parts with spot weld elements in HM. The mesh around these spots is very fine, 0.5mm, but the spot weld has a diameter of 2.5mm. After the analysis, the stress peak is always on the element, wich is connected with the spot weld element but normally, since the weld diameter is 5 times larger than the element's edge length, also the adjacent elements should be directly connected to the weld element. Am I right with this idea?

 

 

Regards

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2013

    I think it is a matter of which type of element you are using to model the spotweld.

     

    So if you are using CWLED or any other two-noded element, then the result will always show a stress peak on that element to which the weld element is attached to. The diameter you choose on the modeling panel i think is only used to determine the weld elements' stiffness.

     

    In your case maybe it could help to model the spotweld with Hexa-Elements, because the hexa-nodes connect a larger area of elements on the welded parts  

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited September 2013

    Yea, I've chosen CWELD elements. How is a spot weld modelling with an Hexa-Element possible?

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