Weld Question

[PEinVA]

How do I evaluate the tensile capacity of a weld as shown in the attached sketch?
I just can't wrap my mind about it this late at night!
Thanks!

RC
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke

 

[PEinVA]

Is this just solved using the instantaneous rotation method?

Brain is fried....

RC
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke

 

[DaveAtkins]

You must resolve Mo into two components, parallel and perpendicular to the weld group. Then find weld stress, due to each component, on the weld group. Finally, add the weld stresses and compare to the allowable weld stress.

DaveAtkins

 

[Lion06]

You'll have a hard time using the ICR method for this as the steel manual only has tables for one case of out-of-plane eccentricities (that for M about your W18), you would have to develop your own table for M about the C12.

Dave is correct. Break Mo into components (about the C12 and about the W18) and get the elastic section properties of the welds about each of these axes. They are easy enough to calculate, but Blodgett also has tables with weld section properties. Find the max load/in for each direction and add them together.

One thing I would use caution with is the component of Mo about the W18. Unless the stress is very low, it looks like a crack could easily initiate at the upper left hand corner and just unzip. I would consider welding the underside of the plate to the W18 flange for some nominal length at the top and bottom to prevent this.