50% UNIAXIAL VARIABLE LOADING 1. A part with a machined surface has continuously varying tension loads Pmax = 50,000 lbs

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50 Uniaxial Variable Loading 1 A Part With A Machined Surface Has Continuously Varying Tension Loads Pmax 50 000 Lbs 1 (118.35 KiB) Viewed 38 times

50% UNIAXIAL VARIABLE LOADING 1. A part with a machined surface has continuously varying tension loads Pmax = 50,000 lbs and Pmin = 20,000 lbs. Material tests Su = 90,000 psi, Se = 34,000 psi, and Sy=70,000 psi. A stress concentration of 1.5 is present. Area of the part is 2.75 in². Assuming there will be plastic yielding of the material, find (a) The value of the intersection S, of the Modified Goodman-Fatigue criterion and the Langer-Yield criteria, in psi. S₁ = Su Su-Sy 1 (b) Factor of Safety n by the Modified Goodman-Fatigue criterion. 1 Om Kfor = Su Se (c) Factor of safety by the Langer-Yield criteria. n n = + Om + Kfor (d) Make your conclusion whether the material will fail by fatigue or by yielding. J ab