Topic: Machine Design
A 10 mm thick plate is welded to another plate using a 10 mm fillet weld on two sides. An end load of 1 kN acts on the plate. The primary shear stress produced in the throat is
- A. 173 N/mm²
- B. 2.4 N/mm²
- C. 85 N/mm²
- D. None of these
Answer: B. 2.4 N/mm²
Explanation: The weld length is 30mm (from the diagram). Primary shear stress = Load / (2 * length * throat_thickness). Throat thickness 't' = size * cos(45). The formula given in the solution P√2 / (2bs) seems to simplify this calculation where s=size. Stress = 1000 / (2 * 30 * 0.707 * 10) = 2.35 N/mm², which is close to 2.4 N/mm².