Question

Problem #2: A tension test was performed on a specimen having an original diameter of 12.5 mm and a gauge length of 50 mm. The force-deflection data are listed in the table below and were used to plot the graph. Load (kN) Elongation (mm) 0 0 11.1 0.0175 31.9 0.0600 37.8 0.1020 40.9 0.1650 43.6 0.2490 53.4 1.0160 62.3 3.0480 64.5 6.3500 62.3 8.8900 58.8 11.9380 Find, showing your methods: a) Young's modulus E b) The yield strength (yield stress) $\sigma_y$ using the .002 $\epsilon$ offset method c) The ultimate strength $\sigma_{\text{ult}}$ (also known as ultimate stress or tensile strength) Point Normal Stress ($\sigma$) in MPa Normal Strain in mm/mm 0 1 2 3 4 5 6 7 8 9 10 11

          Problem #2: A tension test was performed on a specimen having an original diameter of 12.5 mm and a gauge
length of 50 mm. The force-deflection data are listed in the table below and were used to plot the graph.
Load (kN)	Elongation (mm)
0	0
11.1	0.0175
31.9	0.0600
37.8	0.1020
40.9	0.1650
43.6	0.2490
53.4	1.0160
62.3	3.0480
64.5	6.3500
62.3	8.8900
58.8	11.9380
Find, showing your methods:
a) Young's modulus E
b) The yield strength (yield
stress) $\sigma_y$ using the .002 $\epsilon$
offset method
c) The ultimate strength $\sigma_{\text{ult}}$
(also known as ultimate
stress or tensile strength)
Point	Normal Stress ($\sigma$) in MPa	Normal Strain in mm/mm
0
1
2
3
4
5
6
7
8
9
10
11

Problem #2: A tension test was performed on a specimen having an original diameter of 12.5 mm and a gauge
length of 50 mm. The force-deflection data are listed in the table below and were used to plot the graph.
Load (kN) Elongation (mm)
0 0
11.1 0.0175
31.9 0.0600
37.8 0.1020
40.9 0.1650
43.6 0.2490
53.4 1.0160
62.3 3.0480
64.5 6.3500
62.3 8.8900
58.8 11.9380
Find, showing your methods:
a) Young's modulus E
b) The yield strength (yield
stress) using the .002 ϵ
offset method
c) The ultimate strength σult
(also known as ultimate
stress or tensile strength)
Point Normal Stress (σ) in MPa Normal Strain in mm/mm
0
1
2
3
4
5
6
7
8
9
10
11

Added by Miguel -Ngel W.

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