A cantilever beam made of cold drawn carbon steel of circular cross-section as
shown in Fig. 6.18, is subjected to a load which varies 
 
from – F to 3 F. Determine the maximum load that this 
 
 
member can withstand for an indefinite life using a factor 
 
 
of safety as 2. The theoretical stress concentration factor 
 
is 1.42 and the notch sensitivity is 0.9. Assume the 
 
following values :