Spot weld on very fine mesh

Altair Forum User

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

Altair Forum User

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