//(Design against Static Load) Example 4.3
//Tensile yield strength of steel 30C8 Syt (N/mm2)
Syt = 400
//Factor of safety fs 
fs = 4
//Tensile force acting on the rods P (kN)
P = 50
//Inside diameter of the socket d2 (mm)
d2 = 50
//Outside diameter of the socket d4 (mm)
d4 = 100