The plot below of load vs. extension was obtained using a specimen (shown in the following figure)of an alloy remarkably similar to the aluminum-killed steel found in automotive fenders, hoods,etc. The crosshead speed, v, was 3.3x104 inch/second. The extension was measured using a 2"extensometer as shown (G). Eight points on the plastic part of the curve have been digitized foryou. Use these points to help answer the following questions.1.900800(0.10, 630 )700(0.50, 745)(0.30, 729)600(0.20, 699)(0.40, 741.5)500-(0.004, 458)(0.80, 440 ) -400(0.0018, 405)300D= 3.3 "0.03"200G=2.0"100 -0.10.20.30.40.50.60.70.8Extension, inchesa. Determine the following quamtities. Do not neglect to include proper units in your answer.Young's ModulusTotal elongationYield stressUltimate tensile strengthUniform elongationEngineering strain ratePost-uniform elongationb. Construct a table with the following headings, left-to-right: Extension, load, engineeringstrain, engineering stress, true strain, true stress. Fill in for the eight points on graph.What is the percentage difference between true and engineering strains for the first point?(i.e., % =What is the percentage difference between true and engineering strains for the last point?c. Plot the engineering and true stress-strain curves on a single graph using the same units.х 100)d. Calculate the work-hardening rate graphically and provide the in-in plot along with thevalue of n. How does n compare with the uniform elongation in Part a? Why?e. A second tensile test was carried out on an identical specimen of this material, this timeusing a crosshead speed of 3.3x102 inch/second. The load at an extension of 0.30 inchwas 763.4 lb. What is the strain-rate sensitivity index, m, for this material?spunod 'proT

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1. The plot below of load vs. extension was obtaimed using a specimen (shown in the following figure) of an alloy remarkably similar to the alumimum-killed steel found in automotive fenders, hoods, etc. The crosshead speed, v, was 3.3x104 inch/second. The extension was measured using a 2" extensometer as shown (G). Eight points on the plastic part of the curve have been digitized for you. Use these points to help answer the following questions. 900 800 (0.10, 630 ) 700 (0.50, 745) (0.30. 729)

1. The plot below of load vs. extension was obtaimed using a specimen (shown in the following figure) of an alloy remarkably similar to the alumimum-killed steel found in automotive fenders, hoods, etc. The crosshead speed, v, was 3.3x104 inch/second. The extension was measured using a 2" extensometer as shown (G). Eight points on the plastic part of the curve have been digitized for you. Use these points to help answer the following questions. 900 800 (0.10, 630 ) 700 (0.50, 745) (0.30. 729)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Axial Load

When a bar of the uniform cross-section is acted by a load, such that the load acts along the longitudinal axis of the bar, such kinds of loadings are known as axial loadings. In general terms, a load is an external force acting on a component. An axial load acts perpendicular to the geometric cross-section of the component. Based on the direction of the application of the load, an axial load can be tensile or compressive. The analysis of bodies under the action of axial loads is generally studied under the branch of mechanics, known as statics.

Question

The plot below of load vs. extension was obtained using a specimen (shown in the following figure)
of an alloy remarkably similar to the aluminum-killed steel found in automotive fenders, hoods,
etc. The crosshead speed, v, was 3.3x104 inch/second. The extension was measured using a 2"
extensometer as shown (G). Eight points on the plastic part of the curve have been digitized for
you. Use these points to help answer the following questions.
1.
900
800
(0.10, 630 )
700
(0.50, 745)
(0.30, 729)
600
(0.20, 699)
(0.40, 741.5)
500-
(0.004, 458)
(0.80, 440 ) -
400
(0.0018, 405)
300
D= 3.3 "
0.03"
200
G=2.0"
100 -
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
Extension, inches
a. Determine the following quamtities. Do not neglect to include proper units in your answer.
Young's Modulus
Total elongation
Yield stress
Ultimate tensile strength
Uniform elongation
Engineering strain rate
Post-uniform elongation
b. Construct a table with the following headings, left-to-right: Extension, load, engineering
strain, engineering stress, true strain, true stress. Fill in for the eight points on graph.
What is the percentage difference between true and engineering strains for the first point?
(i.e., % =
What is the percentage difference between true and engineering strains for the last point?
c. Plot the engineering and true stress-strain curves on a single graph using the same units.
х 100)
d. Calculate the work-hardening rate graphically and provide the in-in plot along with the
value of n. How does n compare with the uniform elongation in Part a? Why?
e. A second tensile test was carried out on an identical specimen of this material, this time
using a crosshead speed of 3.3x102 inch/second. The load at an extension of 0.30 inch
was 763.4 lb. What is the strain-rate sensitivity index, m, for this material?
spunod 'proT

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