EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Textbook Question
Chapter 28, Problem 11RQ
Which is cleaner, a Class-10 or a Class-1 clean room?
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An AISI 1018 steel ball with 1.100-in diameter is used as a roller between a flat plate
made from 2024 T3 aluminum and a flat table surface made from ASTM No. 30 gray
cast iron. Determine the maximum amount of weight that can be stacked on the
aluminum plate without exceeding a maximum shear stress of 19.00 kpsi in any of the
three pieces. Assume the figure given below, which is based on a typical Poisson's
ratio of 0.3, is applicable to estimate the depth at which the maximum shear stress
occurs for these materials.
1.0
0.8
Ratio of stress to Pmax
0.4
90
0.6
στ
Tmax
0.2
0.5a
a
1.5a
2a
2.5a
За
Distance from contact surface
The maximum amount of weight that can be stacked on the aluminum plate is
lbf.
A carbon steel ball with 27.00-mm diameter is pressed together with an aluminum ball
with a 36.00-mm diameter by a force of 11.00 N. Determine the maximum shear
stress and the depth at which it will occur for the aluminum ball. Assume the figure
given below, which is based on a typical Poisson's ratio of 0.3, is applicable to estimate
the depth at which the maximum shear stress occurs for these materials.
1.0
0.8
Ratio of stress to Pma
9 0.6
στ
24
0.4
Tmax
0.2
0
0.5a
a
1.5a
Z
2a
2.5a
За
Distance from contact surface
The maximum shear stress is determined to be
MPa.
The depth in the aluminum ball at which the maximum shear stress will occur is
determined to be [
mm.
Chapter 28 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 28 - Define the terms wafer, chip, die, device,...Ch. 28 - Why is silicon the semiconductor most used in...Ch. 28 - What do the abbreviations BJT, MOSFET, VLSI,...Ch. 28 - Prob. 4RQCh. 28 - Prob. 5RQCh. 28 - What are the purposes of prebaking and...Ch. 28 - Define selectivity and isotropy, and their...Ch. 28 - Prob. 8RQCh. 28 - Prob. 9RQCh. 28 - What are the levels of interconnection?
Ch. 28 - Which is cleaner, a Class-10 or a Class-1 clean...Ch. 28 - Prob. 12RQCh. 28 - What is a via? Why is it important?Ch. 28 - Describe how electrical connections are...Ch. 28 - Prob. 15RQCh. 28 - Prob. 16RQCh. 28 - Comment on your observations regarding the...Ch. 28 - Describe how n-type and p-type dopants differ.Ch. 28 - Prob. 19QLPCh. 28 - How is epitaxy different from other techniques...Ch. 28 - Note that, in a horizontal epitaxial reactor...Ch. 28 - The table that follows describes three...Ch. 28 - Prob. 23QLPCh. 28 - What is accelerated life testing? Why is it...Ch. 28 - Explain the difference between a die, a chip, anda...Ch. 28 - A common problem in ion implantation is...Ch. 28 - Examine the hole profiles shown in Fig. P28.27...Ch. 28 - Referring to Fig. 28.24, sketch the shape of the...Ch. 28 - Prob. 29QTPCh. 28 - Prob. 30QTPCh. 28 - Prob. 31QTPCh. 28 - A certain design rule calls for metal lines to be...Ch. 28 - Prob. 33QTPCh. 28 - If a square mask of side length 100 m is placed on...Ch. 28 - Obtain an expression for the width of the trench...Ch. 28 - Prob. 36SDPCh. 28 - Inspect various electronic and computer equipment,...Ch. 28 - Describe your understanding of the important...Ch. 28 - Make a survey of the necessity for clean rooms in...Ch. 28 - Prob. 40SDPCh. 28 - Prob. 41SDPCh. 28 - Estimate the time required to etch a spur gear...Ch. 28 - Prob. 43SDPCh. 28 - Review the specific devices, shown in Fig. V.2....
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- Show all work pleasearrow_forwardDraw top, side, front view With pen(cil) and paper Multi view drawing and handwriting all of itarrow_forwardA wheel of diameter 150.0 mm and width 37.00 mm carrying a load 2.200 kN rolls on a flat rail. Take the wheel material as steel and the rail material as cast iron. Assume the figure given, which is based on a Poisson's ratio of 0.3, is applicable to estimate the depth at which the maximum shear stress occurs for these materials. At this critical depth, calculate the Hertzian stresses σr, σy, σz, and Tmax for the wheel. 1.0 0.8 0, т Ratio of stress to Pmax 0.4 0.6 90 69 0.2 0.5b b 1.5b Tmax 2b Distance from contact surface The Hertizian stresses are as follows: 02 = or = -23.8 psi for the wheel =| necessary.) σy for the wheel =| MPa σz for the wheel = MPa V4 for the wheel = | MPa 2.5b ཡི 3b MPa (Include a minus sign ifarrow_forward
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