Answer Happy

Problem 2 (25 points): The steel shaft shown in Fig.1 has a ground finish and is made of AISI 1040 CD. The shaft rotates at 1600 rpm and is supported by ball bearing at A and B. For Fl=1500 and F2=2400 lbs, a) Estimate the Fos with respect to fatigue failure . b) If FOS<1, find for how many hours the shaft is working. c) If the shaft is not rotating then find the FOS (Hint: you should first find the critical section then do the stress and failure analysis for that section). (25 points) 8 in 10 in un An niet in 2
the FOS al section then do the stress and failure analysis for that -8 in -8 in -8 in F in in -10 in 3 in 10 in in An fillets in R B