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Complete the lab in the file
please don't make it look professional work try to keep it basic as much as you can - don't write a lot
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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
156460
4575
75281.5
126450
403.22
27160.98
1392.5
292.8
240.9
252.9
5
43.2
0.0089
0.0064
0.0032
0.0002
0.0124
0.0159
1656.6
483.7
273.3
415.5
19.1
87.5
1628.4
474
253
415.5
12.2
44
*Text E
*Text σy
(GPa)
(MPa)
0.1484
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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