Problem_11_33 - 3 := GPa 1000 MPa := E 70 GPa := 0.25 := u...

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Problem 11.33 Given: A cast iron disk has an inner radius a = 150 mm and an outer radius b = 300 mm, with material properties ρ = 7200 kg/m 3 , E = 70 GPa, ν = 0.25, and σ u = 170 MPa. Determine the speed of revolution (in rpm) of the disk at which the maximum stress is equal to the ultimate strength. Solution: a 150 mm := b 300 mm := ρ 7200 kg m
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Unformatted text preview: 3 := GPa 1000 MPa := E 70 GPa := 0.25 := u 170 MPa := Eq. 11.54 _max 3 + 4 b 2 2 1 1 3 + a 2 b 2 + = u 3 + 4 b 2 1 1 3 + a 2 b 2 + 552.517 1 s = := 5276.1rpm =...
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