Welding Calculations

Design Rules for calculating the strength of butt and fillet welded joints subject to Direct, Bending and Torsional loadings. Plus guidance on calculating centroids and second moment of area.

Just touch the F and B labels with the mouse pointer, don't click them.
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A basic introduction into stress / strain relationships & weld design.
T Fillet Weld
Formula for calculating the stresses in a fillet weld.
Lap Fillet Weld
Formula for calculating the stresses in lap fillet welds subject to shear.
Fillet welded cantilever subject to bending and shear
Lap Joint Subject To Torsion
Fillet welded lap subject to Torsion and shear
Rectangular Block Subject To Torsion
Rectangular and fillet welded and subject to Torsion
T Butt Weld Subject To Torsion
Full Penetration T Butt welded Cantilever subject to Torsion
Lap Joint Subject To Bending and Shear
This calculation method is one I came up with. Unfortunately I couldn't find a similar joint in any technical reference to verify it.
Back Ground Information
Useful revision and helpful for understanding some of the above calculations.
Calculating Volume Using Solids Of Revolution
I came across this method when I was trying to calculate the volume of a dished head on a pressure vessel and found it useful to know.
Sources of my information and some useful references.
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Restore Side Frame
Page last updated 11 February 2001