Question

Problem Statement:
A push-pull rod transmits a fully reversed force F=±200F=±200 klbf. Compute the life N for rods having four different diameters d1=1.65,d2=1.18,d3=0.841d1=1.65,d2=1.18,d3=0.841, and d4=3.07d4=3.07 inches. Material properties: SUT=200SUT=200 kpsi, Se=50Se=50 kpsi, f=0.8,Nt=103,Ne=106f=0.8,Nt=103,Ne=106.

Answer tolerance = 1%1%. Fatigue calculations are best carried out in kpsi. For infinity life, enter N=infinity

Results for this submission Entered Answer Preview Result 24220.93 24220.93 correct 16 correct correct INFINITY INFINITY correct All of the answers above are correct (10 points) Problem Statement: A push-pull rod transmits a fully reversed force F +200 klbf. Compute the life N for rods having four different diameters d1 1.65, d2-1.18. d3-0.841, and d4- 3.07 inches. Material properties: SUT - 200 kpsi, Se - 50 kpsi, Answer tolerance-1%. Fatigue calculations are best carried out in kpsi. For infinity life, enter N-infinity Your answers: N24220.93 2 16 N4infinity

Answer 1

So SoT F 200 kpi, 5 50 kps 200 rev ev Value o a;- Se 50 a 512 Kpst Value 6 b bao.gx200 50 2 b0 16338 165 In yev 254.64 43.5346 ks 65 JY 512 M24250 (yees

1.18 In 2. 54 648 - 132.884 18 cl N 452 cyces - 2. 0.841 In 254.648 960. 03% kpsi rev 360.038 512 0-16838 8 cyeles 4 * 3-01 in т,/: 254.648 = 21.0186 6838 2T.ols6 Since N4 >ぱCycles, it would h,史infinity life Hence N4infin