lab : Virtual Mechanical Properties of Materials in Tension

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Name: Date: CVEN207 2017Su Lab 1: Virtual Mechanical Properties of Materials in Tension Directions: Using the VMSE site “Tensile Tests” module run tensile test for the following materials. From the stress vs. strain plot, fill out the data table and answer the questions. 1) Data table based on the VMSE plots & Appendix: Sample E (GPa) σy (.002 offset) εy σuts(MPa) σf (MPa) εf (MPa) temp. steel aluminum carbon steel cast iron HDPE nylon 162678 396.23 73000 106625 354.729 2647.94 1366.5 305.1 240.9 341.2 10.5 70.7 0.0084 0.077 0.0033 0.0032 0.0296 0.0297 1656.6 484.9 273.7 415.5 19.1 87.5 1628.4 474 253 415.5 12.2 44 *Text E *Text σy (GPa) (MPa) 0.1481 0.2236 0.4302 0.0044 6.3367 0.445 Questions: 2) Compare the materials in order from lowest to highest values obtained for: E, σy, σuts, and σf. 3) Using Appendix H & Callister Text, how closely do your values for E & σy match the expected values? Which ones were different? Why might this be? *Report values as a range if possible 4) What is the optimal shape geometry for a tensile specimen? Why? 5) What is necking and when does it occur? Name: Date: CVEN207 2017Su 6) Which material is most ductile? Which is most brittle? Justify your answer. 7) Assuming a poisson’s ratio of 0.3, what would the lateral strain for tempered steel at a stress of 1000 MPa? 8) Repeat the measurement of E and σy 10 times for tempered steel. What is the average and standard deviation? ***Extra Credit: Comment on the meaning of the average and standard deviation derived in (8)— what does this tell you about your results?
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Attached.

Name:
Date:
CVEN207 2017Su

Lab 1: Virtual Mechanical Properties of Materials in Tension
Directions: Using the VMSE site “Tensile Tests” module run tensile test for the following
materials. From the stress vs. strain plot, fill out the data table and answer the questions.
1) Data table based on the VMSE plots & Appendix:
Sample

E
(GPa)

Temp. steel
aluminum
carbon
steel
cast iron
HDPE
nylon

162678
396.23
73000

σy (.002
offset)
(MPa)
1366.5
305.1
240.9

106625 341.2
354.729 10.5
2647.94 70.7

εy

σuts(MPa)

σf
(MPa)

εf

0.0084
0.077
0.0033

1656.6
484.9
273.7

1628.4
474
253

0.1481
0.2236
0.4302

0.0032
0.0296
0.0297

415.5
19.1
87.5

415.5
12.2
44

0.0044
6.3367
0.445

*Text E
(GPa)

Questions:
2) Compare the materials in order from lowest to highest values obtained for: E, σy, σuts,
and σf.
Answers
Sample
E(GPa)
Temp. steel
162678
Cast iron
106625
Carbon steel
73000
Nylon
2647.94
Aluminum
396.23
HDPE
354.729
Table 1.1 ranking in accordance to elasticity modulus

Sample
Temp. steel
cast iron
Aluminum
Carbon steel
Nylon
HDPE

σy (.002 offset)
(MPa)
1366.5
341.2
305.1
240.9
70.7
10.5

*Text
σy
(MPa)

Name:
Date:
CVEN207 2017Su

Table 1.2 ranking of yield stress σy

Sample
Temp. steel
Aluminum
Cast iron
Carbon steel
Nylon
HDPE
Table1.3 ranking according σuts(MPa)

σuts(MPa)
1656.6
484.9
415.5
273.7
87.5
19.5

sample
Aluminum
Nylon
HDPE
Temp. steel
Carbon steel
Cast iron
Table 1.4 ran...


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