High Stress at Sheet Metal Curves
High Stress at Sheet Metal Curves
(OP)
Hello,
I have a welded structure that I modeled using surface bodies. All bodies intersect at what would be welded joints and all lines are split to ensure node-to-node bonding. Something I typically see with models like these is that I have relatively high stress right where one of the members terminates into another, particularly at the curved portion. I sense that this is not a realistic hot-spot and that it has something to do with the math model, but I don't know how to explain it. Could someone provide me an explanation as to why I see higher stresses where the geometry transitions from a straight section into a curved section? Your help is most appreciated.
The first attachment is the joint as modeled with the intersection highlighted. The second attachment shows the nodal VM stress.
Thanks!
I have a welded structure that I modeled using surface bodies. All bodies intersect at what would be welded joints and all lines are split to ensure node-to-node bonding. Something I typically see with models like these is that I have relatively high stress right where one of the members terminates into another, particularly at the curved portion. I sense that this is not a realistic hot-spot and that it has something to do with the math model, but I don't know how to explain it. Could someone provide me an explanation as to why I see higher stresses where the geometry transitions from a straight section into a curved section? Your help is most appreciated.
The first attachment is the joint as modeled with the intersection highlighted. The second attachment shows the nodal VM stress.
Thanks!





RE: High Stress at Sheet Metal Curves
RE: High Stress at Sheet Metal Curves
RE: High Stress at Sheet Metal Curves
RE: High Stress at Sheet Metal Curves
are you spot welding (joining only relevent nodes) or line welding ?
is this a contact problem (have you constrained the larger piece from bending into the bent piece) ?
RE: High Stress at Sheet Metal Curves
Tobalcane
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RE: High Stress at Sheet Metal Curves
This is modeled as a full seam weld completely around the C profile.
I think Corus may have the answer to my question. With the load path following the stiffest region of a member, that would result in a higher load concentration near the corners of the "C" profile, which produces higher stress. My thought was maybe it had something to do with the elements transitioning across curved geometry, but perhaps it is a reasonable model.
Thanks!