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Weld Strength (Elastic Method)
2

Weld Strength (Elastic Method)

Weld Strength (Elastic Method)

(OP)
Hello,

I am looking for guidance on using the elastic method with different size and type welds in the weld group. For example an HSS connected to an HSS at a right angle with a 3/8in bevel weld on the top and 1/16in fillet welds on the sides. Elastic method goes ahead and determines a size needed for the whole weld group, but the welds are different sizes and experiencing different stresses.

Thanks

RE: Weld Strength (Elastic Method)

2
I'd just ignore the meager 1/16" welds and see if the two bevel welds works.

But to answer your question - the elastic method uses "lines" as representative of the welds - all at the same nominal 1" (or pick your unit) size.
This allows you to generate the required moments of inertia to then calculate stresses based on those 1" lines.

Then you downsize to the required weld size that still meets maximum stresses in the welds.

If you have different relative sizes, I think you can still generate Ix and Iy and Ip with those variations in size and then do the same to back calculate the required size.

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RE: Weld Strength (Elastic Method)

Star for JAE

----
The name is a long story -- just call me Lo.

RE: Weld Strength (Elastic Method)

Also, a 1/16" fillet is not a structural weld, sounds like a seal weld. One more reason to ignore it in your strength calculation.

RE: Weld Strength (Elastic Method)

Blodgett gives a good example or two of the analysis procedure JAE describes.

Mike McCann, PE, SE (WA)


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