5. Figure 2 shows cantilever bracket, which cross section is rectangle with b=2 in and d=1 in with fluctuating force F.

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5 Figure 2 Shows Cantilever Bracket Which Cross Section Is Rectangle With B 2 In And D 1 In With Fluctuating Force F 1 (94.11 KiB) Viewed 26 times

5. Figure 2 shows cantilever bracket, which cross section is rectangle with b=2 in and d=1 in with fluctuating force F. height at root is D=1.125 and fillet radius at the root is r=0.5 in. The length of bracket is l=6 in and the force is located at a=5 in. The material is SAE1040 normalized carbon steel (machined finish) with Sut=80kpsi and Sy=60kpsi. max = 2200 lb "M w mean = 1200 lb F min = 200 lb beam d D b frame R (a) Find mean and alternating stresses at the root. (b) Construct the S-N curve. (c) Find the factor of safety based on Goodman-criteria. (d) Find the expected number of cycles.