Q.1 A rotating steel shaft $(S_{ut}=1200 \ MPa)$ shown in fig below must support a load $F = 2\ KN$ with reliability of 99% Determine FOS.

$S_{ut}=1200\ MPa\ ( N/mm^2)$

R = 99

h = ?

$\sum M_B=0$

$R_A(400)-2\times 10^3(270)=0$

$R_A=1350N$

$\sum Fv=0 \uparrow +ve$

$R_A+R_B-2\times 10^3=0$

$R_B=650N$

BM calculation …