SHIGLEY'S MECH.ENGINEERING DESIGN-EBK>I
10th Edition
ISBN: 9781259489563
Author: BUDYNAS
Publisher: INTER MCG
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Chapter 7, Problem 3P
The rotating solid steel shaft is simply supported by bearings at points B and C and is driven by a gear (not shown) which meshes with the spur gear at D. which has a 150-mm pitch diameter. The force F from the drive gear acts at a pressure angle of 20°. The shaft transmits a torque to point A of TA = 340 N · m. The shaft is machined from steel with Sy = 420 MPa and Sut = 560 MPa. Using a factor of safety of 2.5, determine the minimum allowable diameter of the 250-mm section of the shaft based on (a) a static yield analysis using the distortion energy theory and (b) a fatigue-failure analysis. Assume sharp fillet radii at the bearing shoulders for estimating stress-concentration factors.
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The rotating solid steel shaft is simply supported by bearings at points B and C and is driven
by a gear (not shown) which meshes with the spur gear at D, which has a 140-mm pitch diameter.
The force F from the drive gear acts at a pressure angle of 20°. The shaft transmits a torque to point A
of TA = 260 N-m. The shaft is machined from steel with Sy = 400 MPa and Sut = 560 MPa. Assume factor
of safety and all other factors as (one) 1,.
Determine the minimum allowable diameter of the 100-mm section of the shaft for infinite life
(selectec criter sould be written at the begining of the solution)
250 mm
100 mm
20
The rotating solid steel shaft is simply supported by bearings at points B and C
and is driven by a gear (not shown) which meshes with the spur gear at D, which
250 mm
has a 150 mm pitch diameter. The force F from the drive gear acts at a pressure
angle of 20°. The shaft transmits a torque to point A of T = 340 N. m. The shaft
100 mm
is machined from steel with S, = 420 MPa. Using a factor of safety of 2.5,
determine the minimum allowable diameter of the 250 mm section of the shaft
based on a static yield analysis using the distortion energy theory and maximum
shear stress theory.
PROBLEM 1. The shafts are made of A-36 steel and both have 100 mm diameter. If a torque of 60
kN.m is applied to end E and 25 kN.m to the D gear as shown in the figure, determine the angle of
twist of the section at E of the DE shaft.
0.75 m
0.75 m
150 mm
25 kN-m
300 mm
60 kN.m
1.25 m
E
Chapter 7 Solutions
SHIGLEY'S MECH.ENGINEERING DESIGN-EBK>I
Ch. 7 - A shaft is loaded in bending and torsion such that...Ch. 7 - The section of shaft shown in the figure is to be...Ch. 7 - The rotating solid steel shaft is simply supported...Ch. 7 - A geared industrial roll shown in the figure is...Ch. 7 - Design a shaft for the situation of the industrial...Ch. 7 - The figure shows a proposed design for the...Ch. 7 - For the problem specified in the table, build upon...Ch. 7 - Prob. 8PCh. 7 - For the problem specified in the table, build upon...Ch. 7 - For the problem specified in the table, build upon...
Ch. 7 - In the figure is a proposed shaft design to be...Ch. 7 - The shaft shown in the figure is proposed for the...Ch. 7 - Prob. 20PCh. 7 - The shaft shown in the figure is proposed for the...Ch. 7 - Prob. 25PCh. 7 - Prob. 26PCh. 7 - Prob. 27PCh. 7 - A 25-mm-diameter uniform steel shaft is 600 mm...Ch. 7 - Prob. 29PCh. 7 - Compare Eq. (727) for the angular frequency of a...Ch. 7 - Prob. 31PCh. 7 - The steel shaft shown in the figure carries a...Ch. 7 - A transverse drilled and reamed hole can be used...Ch. 7 - Prob. 34PCh. 7 - The shaft shown in Prob. 721 is proposed for the...Ch. 7 - A guide pin is required to align the assembly of a...Ch. 7 - Prob. 37PCh. 7 - Prob. 38PCh. 7 - Prob. 39PCh. 7 - A ball bearing has been selected with the bore...Ch. 7 - Prob. 41PCh. 7 - A gear and shaft with nominal diameter of 35 mm...
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