A stepped shaft has dimensions of D = 2 in., d = 1 in., and r = 0.1 in. It is machined from AISI steel of 200 Bhn hardness. The load is fully reversed axial torsion. 30 seconds of time history of the nominal torsional stress in the 1 in, section of the shaft, tnom(t) = Tr/J, is shown (dots indicate the beginning/end of each load cycle; there are 20 cycles total in 30 seconds.). This duty cycle continues repeating. (a) Use Miner's rule to estimate the life of the shaft in cycles. (b) What is the expected life in hours. Su = 0.5HB for steel. 30 20 10 -10 -20 -30 30 seconds D= 2 in. ]d=1 in. (= 0.1 in. 200 Bhn (15) Ssas uo

A stepped shaft has dimensions of D = 2 in., d = 1 in., and r = 0.1 in. It is machined from AISI steel of 200 Bhn hardness. The load is fully reversed axial torsion. 30 seconds of time history of the nominal torsional stress in the 1 in, section of the shaft, tnom(t) = Tr/J, is shown (dots indicate the beginning/end of each load cycle; there are 20 cycles total in 30 seconds.). This duty cycle continues repeating. (a) Use Miner's rule to estimate the life of the shaft in cycles. (b) What is the expected life in hours. Su = 0.5HB for steel. 30 20 10 -10 -20 -30 30 seconds D= 2 in. ]d=1 in. (= 0.1 in. 200 Bhn (15) Ssas uo

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Problem 1.1MA

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Concept explainers

Clutches, Brakes, Couplings, and Flywheels

The clutch is described as a machine element used to connect or disconnect two shafts together to transmit torque or power. The clutch works on the principles of friction. The clutch is commonly used in automobiles to transfer power from the driving shaft to the driven shaft.

Question

A stepped shaft has dimensions of D = 2 in., d = 1 in., and
r= 0.1 in. It is machined from AISI steel of 200 Bhn
hardness. The load is fully reversed axial torsion. 30
seconds of time history of the nominal torsional stress in
the 1 in, section of the shaft, Tnom(t) = Tr/J, is shown (dots
indicate the beginning/end of each load cycle; there are 20
cycles total in 30 seconds.). This duty cycle continues
repeating. (a) Use Miner's rule to estimate the life of the
shaft in cycles. (b) What is the expected life in hours. Su
0.5HB for steel.
30
20
10
-10
-20
-30
30 seconds
D=2 in.
d=1 in.
f= 0.1 in.
200 Bhn

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