EBK NUMERICAL METHODS FOR ENGINEERS
7th Edition
ISBN: 9780100254145
Author: Chapra
Publisher: YUZU
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Textbook Question
Chapter 20, Problem 54P
The creep rate
find the value of B and m. Plot your results using a log-log scale.
| Creep rate,
|
0.0004 | 0.0011 | 0.0021 | 0.0031 |
| Stress, MPa | 5.775 | 8.577 | 10.874 | 12.555 |
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Students have asked these similar questions
Graph the following data on a stress-strain curve. Identify/Determine the following: Elastic Limit, Plastic
Limit, Proportional Limit, Upper Yield Point, Lower Yield Point, Ultimate Strength, Rupture Strength, and
Modulus of Elasticity.
Engr.
True
Stress
Strain
o, MPa
102.3
0.00050
204.7
0.00102
293.5
0.00146
272.9
0.00230
264.0
0.00310
268.9
0.00500
267.6
0.00700
264.0
0.01000
318.6
0.0490
372.0
0.1250
394.4
0.2180
395.0
0.2340
384.2
0.3060
360.4
0.3300
327.5
0.3480
290.0
0.3600
266.8
0.3660
4. The following data were obtained from a standard tensile stress test on a mild
steel specimen. Graph the result and determine proportional limit stress and
Young's Modulus.
STRESS (Mpa)
STRAIN (1 x 104)
69
3.6
138
6.8
207
10.2
276
13.0
345
18.4
414
27.2
462
41.8
552
71.0
During a tensile test of Aluminum alloy whose initial diameter was 0.505-in and gage
length was 2.0-in, the following data was recorded.
Load
Elongation
(in.)
Load
Elongation
(in.)
0.020
(1b)
|(Ib)
14 000
2 310
0.00220
14 400
0.025
4 640
0.00440
14 500
0.060
6 950
0.00660
14 600
0.080
9 290
0.00880
14 800
0.100
11 600
0.0110
14 600
0.120
12 600
0.0150
13 600 Fracture
a) Determine Stress and strain
b) Draw the stress strain diagram
c) Determine the following mechanical properties
1) Proportional limit,
2) Modulus of elasticity
3) Yield point
4) Ultimate strength
5) Rupture strength.
Chapter 20 Solutions
EBK NUMERICAL METHODS FOR ENGINEERS
Ch. 20 - 20.1 Perform the same computation as in Sec. 20.1,...Ch. 20 - You perform experiments and determine the...Ch. 20 - 20.3 It is known that the tensile strength of a...Ch. 20 - Prob. 4PCh. 20 - 20.5 The specific volume of a superheated steam is...Ch. 20 - Prob. 6PCh. 20 - In Alzheimers disease, the number of neurons in...Ch. 20 - 20.8 The following data were taken from a stirred...Ch. 20 - Prob. 9PCh. 20 - Concentration data were taken at 15 time points...
Ch. 20 - Prob. 11PCh. 20 - The molecular weight of a polymer can be...Ch. 20 - 20.13 On average, the surface area A of human...Ch. 20 - 20.14 Determine an equation to predict metabolism...Ch. 20 - 20.15 Human blood behaves as a Newtonian fluid...Ch. 20 - 20.16 Soft tissue follows an exponential...Ch. 20 - 20.17 The thickness of the retina changes during...Ch. 20 - 20.18 The data tabulated below were generated from...Ch. 20 - The shear stresses, in kilopascals (kPa), of nine...Ch. 20 - 20.20 A transportation engineering study was...Ch. 20 - The saturation concentration of dissolved oxygen...Ch. 20 - For the data in Table P20.21, use polynomial...Ch. 20 - 20.23 Use multiple linear regression to derive a...Ch. 20 - 20.24 As compared to the models from Probs. 20.22...Ch. 20 - 20.25 In water-resources engineering, the sizing...Ch. 20 - 20.26 The concentration of total phosphorus and...Ch. 20 - 20.27 The vertical stress under the corner of a...Ch. 20 - Three disease-carrying organisms decay...Ch. 20 - 20.29 The mast of a sailboat has a cross-sectional...Ch. 20 - 20.30 Enzymatic reactions are used extensively to...Ch. 20 - 20.31 Environmental engineers dealing with the...Ch. 20 - An environmental engineer has reported the data...Ch. 20 - The following model is frequently used in...Ch. 20 - 20.34 As a member of Engineers Without Borders,...Ch. 20 - 20.35 Perform the same computations as in Sec....Ch. 20 - 20.36 You measure the voltage drop V across a...Ch. 20 - Duplicate the computation for Prob. 20.36, but use...Ch. 20 - The current in a wire is measured with great...Ch. 20 - 20.39 The following data was taken from an...Ch. 20 - It is known that the voltage drop across an...Ch. 20 - Ohms law states that the voltage drop V across an...Ch. 20 - 20.42 Repeat Prob. 20.41 but determine the...Ch. 20 - 20.43 An experiment is performed to determine the...Ch. 20 - Bessel functions often arise in advanced...Ch. 20 - 20.45 The population of a small community on the...Ch. 20 - Based on Table 20.4, use linear and quadratic...Ch. 20 - 20.47 Reproduce Sec. 20.4, but develop an equation...Ch. 20 - 20.48 Dynamic viscosity of water is related to...Ch. 20 - 20.49 Hooke’s law, which holds when a spring is...Ch. 20 - 20.50 Repeat Prob. 20.49 but fit a power curve to...Ch. 20 - The distance required to stop an automobile...Ch. 20 - An experiment is performed to define the...Ch. 20 - The acceleration due to gravity at an altitude y...Ch. 20 - The creep rate is the time rate at which strain...Ch. 20 - 20.55 It is a common practice when examining a...Ch. 20 - The relationship between stress and the shear...Ch. 20 - The velocity u of air flowing past a flat surface...Ch. 20 - 20.58 Andrade’s equation has been proposed as a...Ch. 20 - Develop equations to fit the ideal specific heats...Ch. 20 - 20.60 Temperatures are measured at various points...Ch. 20 - 20.61 The data below were obtained from a creep...
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