The shaft shown is rotating under loads F1=2.3,F2=1.8 klbf. Dimensions are c=8,e=8,g=8,h=10,m=10,n=3 in. All fillets have 1/16 radius. The critical location is at x=10.5 (point Q) where the moment is high, the diameter small, and the fillet causes a stress concentration. The material is cold drawn steel with SUT=95,Sy=65 kpsi. Assume Nt=103,Ne=106.

1? Calculate the endurance limit Se adjusted for modifying factors.

2? Calculate the reduction factor f from equations, not from chart.

3? Calculate the intercept a of the high-cycle fatigue line.

4? Calculate the slope b of the high-cycle fatigue line.

5? Calculate the fatigue stress concentration Kf adjusted for notch sensitivity q calculated from equations, not from chart.

6? Calculate the number of cycles N to failure.

Transcribed Image Text:

(10 points) Lufi 1 in in O in 100 E F₁ P Q D 00 in m F₂ R g 1 in S -|N 7 → in so (10 points) Lufi 1 in in O in 100 E F₁ P Q D 00 in m F₂ R g 1 in S -|N 7 → in so

Answer rating: 100% (QA)

Calculation of support reactions R A R B F 1 F 2 2317 4 klbf Taking moments about O F 1 c F 2 ceR B ... View the full answer