DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Chapter 33, Problem 37RQ
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The potential benefits of preheating the powder in selective laser sintering.
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The beam is made of elastic perfectly plastic material. Determine the shape factor for the cross
section of the beam (Figure Q3). [Take σy = 250 MPa, yNA = 110.94 mm, I = 78.08 x 106 mm²]
y
25 mm
75 mm
I
25 mm
200 mm
25 mm
125
Figure Q3
A beam of the cross section shown in Figure Q3 is made of a steel that is assumed to be elastic-
perfectectly plastic material with E = 200 GPa and σy = 240 MPa. Determine:
i.
The shape factor of the cross section
ii.
The bending moment at which the plastic zones at the top and bottom of the bar are 30
mm thick.
15 mm
30 mm
15 mm
30 mm
30 mm
30 mm
A torque of magnitude T = 12 kNm is applied to the end of a tank containing compressed air
under a pressure of 8 MPa (Figure Q1). The tank has a 180 mm inner diameter and a 12 mm
wall thickness. As a result of several tensile tests, it has been found that tensile yeild strength
is σy = 250 MPa for thr grade of steel used. Determine the factor of safety with respect to yeild,
using:
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(b) The maximum distortion energy theory
T
Figure Q1
Chapter 33 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 33 - What are the four traditional families of...Ch. 33 - What are some of the assets and limitations of the...Ch. 33 - What are some of the manufacturing changes or new...Ch. 33 - Prob. 4RQCh. 33 - What is a prototype and how is it used?Ch. 33 - What are the four areas of application for the...Ch. 33 - What are some of the other terms that have been...Ch. 33 - What are the attractive benefits of free-form...Ch. 33 - What is involved in preprocessing?Ch. 33 - Prob. 10RQ
Ch. 33 - Prob. 11RQCh. 33 - Prob. 12RQCh. 33 - Prob. 13RQCh. 33 - What are the three families of layerwise...Ch. 33 - Prob. 15RQCh. 33 - Prob. 16RQCh. 33 - Prob. 17RQCh. 33 - What is stairstepping?Ch. 33 - Describe the coordinate system that has become...Ch. 33 - Prob. 20RQCh. 33 - What are some of the factors that affect the...Ch. 33 - What is hatching and how might it be affected by...Ch. 33 - Prob. 23RQCh. 33 - Of the three components of build time...Ch. 33 - Prob. 25RQCh. 33 - How the various layers produced during...Ch. 33 - Prob. 27RQCh. 33 - Prob. 28RQCh. 33 - Prob. 29RQCh. 33 - Prob. 30RQCh. 33 - Prob. 31RQCh. 33 - What are the advantages of inkjet deposition (ID)...Ch. 33 - How are the various layers produced during...Ch. 33 - Prob. 34RQCh. 33 - Prob. 35RQCh. 33 - How might the products of selective laser...Ch. 33 - Prob. 37RQCh. 33 - Why might some form of protective atmosphere be...Ch. 33 - Prob. 39RQCh. 33 - What is the difference between selective laser...Ch. 33 - Describe the ideal product for manufacture by...Ch. 33 - What are some of the advantages of using an...Ch. 33 - How are the various layers produced during 3-D...Ch. 33 - Prob. 44RQCh. 33 - Prob. 45RQCh. 33 - Prob. 46RQCh. 33 - Prob. 47RQCh. 33 - What are some of the potential benefits of...Ch. 33 - Prob. 49RQCh. 33 - Prob. 50RQCh. 33 - What are some of the advantages and disadvantages...Ch. 33 - Prob. 52RQCh. 33 - Prob. 53RQCh. 33 - Prob. 54RQCh. 33 - Prob. 55RQCh. 33 - How are products extracted after a...Ch. 33 - Prob. 57RQCh. 33 - Prob. 58RQCh. 33 - Prob. 59RQCh. 33 - What are some of the advantages of a physical...Ch. 33 - Prob. 61RQCh. 33 - How can the additive manufacturing processes be...Ch. 33 - Prob. 63RQCh. 33 - Prob. 64RQCh. 33 - Prob. 65RQCh. 33 - Prob. 66RQCh. 33 - Prob. 67RQCh. 33 - Prob. 68RQCh. 33 - Prob. 69RQCh. 33 - What are some of the commonly cited limitations or...Ch. 33 - Prob. 71RQCh. 33 - Prob. 72RQCh. 33 - Prob. 73RQCh. 33 - Prob. 74RQCh. 33 - Which of the additive manufacturing processes can...Ch. 33 - Prob. 2PCh. 33 - Prob. 3PCh. 33 - The ability to restore worn parts to original...Ch. 33 - Prob. 5PCh. 33 - Prob. 6PCh. 33 - Prob. 7PCh. 33 - Prob. 8P
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