Page 127 - Fundamental Of Design In Mechanical Engineering

Stresses in welded joint in bending

◦ Primary Shear force (vertical)

τ‘ = V/A

◦ Second momonet of area

I = bd /2
2
u

◦ Second moment area based on weld throat

I = 0.707hI = 0.707h (bd /2)
2
u

◦ The norminal throat shear stress (horizontal)

τ” = Mc/I = (Md/2)/(0.707hbd /2) =1.414M/bdh
2

◦ Total Shear Stress
127
τ = (τ’ + τ” )
2
2 1/2