Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 14.12, Problem 53KCP
To determine
The
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20.
[Ans. 9; 71.8 mm]
A semi-elliptical laminated spring is made of 50 mm wide and 3 mm thick plates. The length between
the supports is 650 mm and the width of the band is 60 mm. The spring has two full length leaves and
five graduated leaves. If the spring carries a central load of 1600 N, find:
1. Maximum stress in full length and graduated leaves for an initial condition of no stress in the
leaves.
2. The maximum stress if the initial stress is provided to cause equal stress when loaded.
[Ans. 590 MPa ; 390 MPa ; 450 MPa ; 54 mm]
3. The deflection in parts (1) and (2).
Q6/ A helical square section spring is set inside another, the outer spring having a free
length of 35 mm greater than the inner spring. The dimensions of each spring are as
follows:
Mean diameter (mm)
Side of square section (mm)
Active turns
Outer
Inner
Spring
Spring
120
70
8
7
20
15
Determine the (1) Maximum deflection of the two springs and (2) Equivalent spring
rate of the two springs after sufficient load has been applied to deflect the outer
spring 60 mm. Use G = 83 GN/m².
Q2/ The bumper springs of a railway carriage are to be made of rectangular section wire.
The ratio of the longer side of the wire to its shorter side is 1.5, and the ratio of mean
diameter of spring to the longer side of wire is nearly equal to 6. Three such springs
are required to bring to rest a carriage weighing 25 kN moving with a velocity of
75 m/min with a maximum deflection of 200 mm. Determine the sides of the
rectangular section of the wire and the mean diameter of coils when the shorter side is
parallel to the axis of the spring. The allowable shear stress is not to exceed 300 MPa
and G = 84 kN/mm².
Q6/ A belical
Chapter 14 Solutions
Foundations of Materials Science and Engineering
Ch. 14.12 - Describe the classic model for electrical...Ch. 14.12 - Prob. 2KCPCh. 14.12 - Prob. 3KCPCh. 14.12 - Prob. 4KCPCh. 14.12 - Prob. 5KCPCh. 14.12 - Define the following quantities pertaining to the...Ch. 14.12 - Prob. 7KCPCh. 14.12 - What structural defects contribute to the residual...Ch. 14.12 - Prob. 9KCPCh. 14.12 - Prob. 10KCP
Ch. 14.12 - Prob. 11KCPCh. 14.12 - Prob. 12KCPCh. 14.12 - Prob. 13KCPCh. 14.12 - Prob. 14KCPCh. 14.12 - Prob. 15KCPCh. 14.12 - Prob. 16KCPCh. 14.12 - Prob. 17KCPCh. 14.12 - Prob. 18KCPCh. 14.12 - Prob. 19KCPCh. 14.12 - Prob. 20KCPCh. 14.12 - Prob. 21KCPCh. 14.12 - Prob. 22KCPCh. 14.12 - Prob. 23KCPCh. 14.12 - Prob. 24KCPCh. 14.12 - Prob. 25KCPCh. 14.12 - Prob. 26KCPCh. 14.12 - Prob. 27KCPCh. 14.12 - Describe the movement of the majority and minority...Ch. 14.12 - Prob. 29KCPCh. 14.12 - Prob. 30KCPCh. 14.12 - What is a zener diode? How does this device...Ch. 14.12 - Prob. 32KCPCh. 14.12 - Prob. 33KCPCh. 14.12 - Prob. 34KCPCh. 14.12 - Prob. 35KCPCh. 14.12 - Describe how the planar bipolar transistor can...Ch. 14.12 - Prob. 37KCPCh. 14.12 - Prob. 38KCPCh. 14.12 - Prob. 39KCPCh. 14.12 - Prob. 40KCPCh. 14.12 - Prob. 41KCPCh. 14.12 - Prob. 42KCPCh. 14.12 - Prob. 43KCPCh. 14.12 - Prob. 44KCPCh. 14.12 - Prob. 45KCPCh. 14.12 - Prob. 46KCPCh. 14.12 - Prob. 47KCPCh. 14.12 - Prob. 48KCPCh. 14.12 - Prob. 49KCPCh. 14.12 - Prob. 50KCPCh. 14.12 - Prob. 51KCPCh. 14.12 - Prob. 52KCPCh. 14.12 - Prob. 53KCPCh. 14.12 - What are ferroelectric domains? How can they be...Ch. 14.12 - Prob. 55KCPCh. 14.12 - Prob. 56KCPCh. 14.12 - What are the PZT piezoelectric materials? In what...Ch. 14.12 - Prob. 58AAPCh. 14.12 - Prob. 59AAPCh. 14.12 - Prob. 60AAPCh. 14.12 - Prob. 61AAPCh. 14.12 - Prob. 62AAPCh. 14.12 - Prob. 63AAPCh. 14.12 - Prob. 64AAPCh. 14.12 - Prob. 65AAPCh. 14.12 - Prob. 66AAPCh. 14.12 - Prob. 67AAPCh. 14.12 - Prob. 68AAPCh. 14.12 - Prob. 69AAPCh. 14.12 - Prob. 70AAPCh. 14.12 - Phosphorus is added to make an n-type silicon...Ch. 14.12 - Prob. 72AAPCh. 14.12 - A silicon wafer is doped with 2.50 1016 boron...Ch. 14.12 - A silicon wafer is doped with 2.50 1015...Ch. 14.12 - Prob. 75AAPCh. 14.12 - Prob. 76AAPCh. 14.12 - Prob. 77AAPCh. 14.12 - What fabrication techniques are used to encourage...Ch. 14.12 - Prob. 79AAPCh. 14.12 - Prob. 80AAPCh. 14.12 - Calculate the intrinsic electrical conductivity of...Ch. 14.12 - Prob. 82AAPCh. 14.12 - Prob. 83AAPCh. 14.12 - Prob. 85AAPCh. 14.12 - Prob. 86AAPCh. 14.12 - Prob. 87AAPCh. 14.12 - Prob. 88AAPCh. 14.12 - Prob. 89AAPCh. 14.12 - Prob. 90AAPCh. 14.12 - Prob. 91AAPCh. 14.12 - Prob. 92SEPCh. 14.12 - Prob. 93SEPCh. 14.12 - Design a p-type semiconductor based on Si that...Ch. 14.12 - Prob. 95SEPCh. 14.12 - Prob. 96SEPCh. 14.12 - Prob. 97SEPCh. 14.12 - Prob. 98SEPCh. 14.12 - Prob. 99SEPCh. 14.12 - Prob. 100SEP
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