A round stepped steel bar of diameters D and d with shoulder fillet r is subjected to axial tensile load P. Find the ratio between limit load PL and elastic limit load Py.


A) PL/Py = (D + d)/r
B) PL/Py = D/d
C) PL/Py = (D - d)/r
D) PL/Py = D/(d + r)