shaft is subject to the stresses at the tip point as given below; Tmean = 100 Nm, Taiternating= 50 Nm, • Mmean = 30 Nm, Malternating= 40 Nm, Fmean = 4 kN, Faiternating= 6 kN. This shaft has minimum properties of Sy = 800 Mpa and Sut = 1000 Mpa. Assume; Kf for bending= tension = 1.4, and Kfs for torsion = 1.8. Using Modified Goodman criterion what can you say about the shaft? a) Does it have an infinite life?

Mechanics of Materials (MindTap Course List)
9th Edition
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Barry J. Goodno, James M. Gere
Chapter3: Torsion
Section: Chapter Questions
Problem 3.5.8P: A solid circular bar of steel (G = 78 GPa) transmits a torque T = 360 N - m. The allowable stresses...
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We have a grounded 2 cm in diameter steel shaft which is 10 cm in length connected to a rigid surface. This
shaft is subject to the stresses at the tip point as given below;
• Tmean = 100 Nm,
Talternating= 50 Nm,
• Mmean = 30 Nm,
Malternating= 40 Nm,
Fmean
= 4 kN,
Falternating = 6 kN.
This shaft has minimum properties of Sy = 800 Mpa and Sut = 1000 Mpa. Assume; Kf for bending=D1.5, Kf for
tension = 1.4, and Kfs for torsion = 1.8.
Using Modified Goodman criterion what can you say about the shaft?
a) Does it have an infinite life?
Transcribed Image Text:We have a grounded 2 cm in diameter steel shaft which is 10 cm in length connected to a rigid surface. This shaft is subject to the stresses at the tip point as given below; • Tmean = 100 Nm, Talternating= 50 Nm, • Mmean = 30 Nm, Malternating= 40 Nm, Fmean = 4 kN, Falternating = 6 kN. This shaft has minimum properties of Sy = 800 Mpa and Sut = 1000 Mpa. Assume; Kf for bending=D1.5, Kf for tension = 1.4, and Kfs for torsion = 1.8. Using Modified Goodman criterion what can you say about the shaft? a) Does it have an infinite life?
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