You have built the majority of the tension testing machine, but much of the instrumentation is still being assembled. To test the machine, you perform a test on a steel specimen with known properties. The machine provides you with the given load data, and you manually record the lengths between the marks on the specimen at each point using an extensometer to obtain the table of data shown below L (in) 2.2804 2.0012 3.51 2.0025 7,09 2.0350 7.87 20798 8.83 2.1313 9.84 2.1937 10.80 P (kip) 11.77 Use these results to calculate the stress and strain at the yield point, the ultimate strength point, and the fracture point Express your answers to three significant figures. View Available Hint(s) 14 12 10 stress= strain = ksi stress = ?? ksi 2.4774 12.37 D 2.5791 11.80 2.6657 10.81 2.7281 9.81 2.74 9

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You have built the majority of the tension testing machine, but much of the instrumentation is still being assembled. To test the machine, you perform a test on a steel specimen with known properties. The machine provides you with the given load
data, and you manually record the lengths between the marks on the specimen at each point using an extensometer to obtain the table of data shown below.
2.2804
L (in)
2.0012
3.51
2.0025
7.09
2.0350
7.87
2.0798
8.83
2.1313
9.84
2.1937
10.80
11.77
P (kip)
Use these results to calculate the stress and strain at the yield point, the ultimate strength point, and the fracture point.
Express your answers to three significant figures.
► View Available Hint(s)
Force (kip)
14
12
10
8
6
4
2
04
2.00
stress =
strain =
2.20
ksi
2.40
Length (in)
17
stress =
strain =
2.60
2.80
ksi
stress =
strain =
ksi
2.4774
12.37
2.5791
11.80
2.6657
10.81
2.7281
9.81
2.7497
9.42
Transcribed Image Text:You have built the majority of the tension testing machine, but much of the instrumentation is still being assembled. To test the machine, you perform a test on a steel specimen with known properties. The machine provides you with the given load data, and you manually record the lengths between the marks on the specimen at each point using an extensometer to obtain the table of data shown below. 2.2804 L (in) 2.0012 3.51 2.0025 7.09 2.0350 7.87 2.0798 8.83 2.1313 9.84 2.1937 10.80 11.77 P (kip) Use these results to calculate the stress and strain at the yield point, the ultimate strength point, and the fracture point. Express your answers to three significant figures. ► View Available Hint(s) Force (kip) 14 12 10 8 6 4 2 04 2.00 stress = strain = 2.20 ksi 2.40 Length (in) 17 stress = strain = 2.60 2.80 ksi stress = strain = ksi 2.4774 12.37 2.5791 11.80 2.6657 10.81 2.7281 9.81 2.7497 9.42
Suppose you need to design a tension test machine capable of testing specimens that have nominal ultimate stresses as high as ou = 70 ksi. How much force must the machine be capable of generating? Assume the testing specimen has
the ASTM shape shown.
Express your answer to three significant figures with the appropriate units.
►View Available Hint(s)
μÀ
Value
C
Units
?
d = 0.5 in.
L₁= 2 in.
Transcribed Image Text:Suppose you need to design a tension test machine capable of testing specimens that have nominal ultimate stresses as high as ou = 70 ksi. How much force must the machine be capable of generating? Assume the testing specimen has the ASTM shape shown. Express your answer to three significant figures with the appropriate units. ►View Available Hint(s) μÀ Value C Units ? d = 0.5 in. L₁= 2 in.
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