A machined steel drive shaft used at the right rear wheel in an electrical car can be modeled as shown
in the figure below. The shaft rotates at 600 rpm and it is simply supported by ball bearings at points C
and F. There are fillet radiuses at points D and E. The parameters given in the figure are defined at the
table below. Shaft material properties: $S_u = 700 \text{ MPa}$, $S_y = 500 \text{ MPa}$, $E = 210 \text{ GPa}$, density$=7800 \text{ kg/}m^3$.
Select any additional required parameters/constants as an appropriate value from the course slides
and/or textbook.
Find factor of safety guarding against fatigue and first-cycle yielding using
a. Modified Goodman criteria,
b. Gerber criteria.
h
1
i
D
E
ABC
F
G
k
g
f
abc
d
e
a=60mm, b=65mm, c=70mm, d=90mm, e=110mm, f=100mm, g=2 kN, h=2 kN, i=0.2 kNm, j=15mm,
k=20mm, l=75°
