Calculating welds - Second moment of area

[psoutzis]

Hi everyone,


I’m not sure if this is the right place to post this, but I’m hoping someone can point me in the right direction.


I need to calculate the second moment of area for a weld configuration. I have a hollow tube welded onto a flat plate (picture attached). The setup includes two intermittent welds, each 30mm long and positioned equally spaced around the circumference at an angle.


I came across the "sector of a hollow circle" formula in Roark's handbook, which seems helpful for calculating the second moment of area about the x-axis for a single weld. However, in my case, the welds aren’t aligned along the x-axis — they’re positioned at an angle.

Tube OD: 420mm
Fillet weld 6mm

Has anyone tackled a similar problem or know how to approach calculating the second moment of area for welds placed like this?


Thanks in advance for any guidance!

 

[prex]

The second moment of area, as the word iteself says, is area x distance squared.
Pls post this kind of questions in the students forum