Question

When fillet welds are subjected to combination of normal and shear stress, the equivalent stress is given by :

(a) √(fa^2+q^2)

(b) √(fa^2+2q^2)

(c) √(3fa^2+q^2)

(d) √(fa^2+3q^2)

I had been asked this question during an online interview.

I'm obligated to ask this question of Design of Welds in section Welded Connections of Design of Steel Structures

Answer 1

The correct answer is (d) √(fa^2+3q^2)

The explanation: When fillet welds are subjected to combination of normal and shear stress, the equivalent stress is given by fe = √(fa2+3q^2), where fa = normal stresses, compression or tension, due to axial force or bending moment, q = shear stress due to shear force or tension.