A in.x 3 in. bar of 1045 hot-rolled steel is loaded by a tension force varying continuously from Pmax = 40,000 lb. to Pmin = 30,000 lb. k = 1.5. It is expected that the operating temperature condition is 100 °F, and a required 90 % reliability. For the material: S, = 98,000 psi, S, = 59,000 psi, & = 24 %, and a ground surface. To be done: (a) Estimate the endurance strength for the material, in psi (b)Find the factor of safety by the Langer-yield/ASME-elliptic criteria.

A in.x 3 in. bar of 1045 hot-rolled steel is loaded by a tension force varying continuously from Pmax = 40,000 lb. to Pmin = 30,000 lb. k = 1.5. It is expected that the operating temperature condition is 100 °F, and a required 90 % reliability. For the material: S, = 98,000 psi, S, = 59,000 psi, & = 24 %, and a ground surface. To be done: (a) Estimate the endurance strength for the material, in psi (b)Find the factor of safety by the Langer-yield/ASME-elliptic criteria.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.35P

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