Question

Maximum shear stress in transverse fillet weld of leg h and length l is

(a) P/hl

(b) 1.21P/hl

(c) P/1.21hl

(d) None of the listed

This question requires clarification and I found it in a certification exam.

This doubt is from the Keys unit in lesson Shafts, Keys and Couplings of Machine Design

Answer 1

The correct choice is (b) 1.21P/hl

Here's the scoop: τ= PSinθ(Sinθ+Cosθ)/hl, by maximising it θ=67.5’ and hence find corresponding τ.