Question

Please solve questions 9, 10, 11 with easy to follow steps. The answers are already provided I just need to see a clear process. Will upvote if thats satisfied. Thanks.

9. The following figure, as in our class notes and homework, describes the behavior of a bolted tension joint. 9000 6000 5000 4000 3000 2000 1000 5000 What is the stiffness coefficient of the joint? c= 0.2 10. Suppose the external load is 3000 lbs. Calculate the safety factor against joint

Answer 1

+ + + + 9000 8000 7000 6000 Soooo Bolt load line rabs - sefeaution Nominal bolt preload Yook load 3000 + 2000 I000 O a gooo © Todo 2000 ca) 3000 4000 SODO 6000 7000 8000 Applied load (168) stiffness coefficient of the joint? - slope of bolt load line CBC) c = 92- 9 6250-5000 2250 -0.2 Xx - 6250 -0 = care = 0.2 Capproximate Value from Plot) (10) Fa capplied) - 2000 lbf. Fsep 6250 F.O.5 = 3000 -capplied) F.0.5= 2.083 (11) Ft Capplied) = 6000 lbs E preload - 5000 lbf to = FPR + C Etruppen - 5000+ 0.2 (6000) F = 5000 + 1200 = 6200 lof