代做ME 2356: Laboratory for Mechanics of Materials代做Matlab编程
- 首页 >> Python编程Department of Mechanical and Industrial Engineering
ME 2356: Laboratory for Mechanics of Materials
I. Introduction
Provide a brief statement of what the purpose of the experiment was. Discuss all three experiments here (Instron, Manual tester, and Polariscope). (1 to 2 paragraphs) (5 points)
1. Instron Experiment (41 points)
1.1 Instron Methods
· Briefly explain:
o What instruments were used.
o What sample was tested.
o What was measured.
o How the measurements were taken, etc.
· Show all equations used for calculations in this experiment (Need to show the equations behind the calculations in your MATLAB code). Your equations don’t have to look pretty. They just need to be understandable.
1.2 Instron Results and Discussion
Results
· Sample material and measurements table
Table x. “Material” sample.
|
Parameter |
Initial value |
Final value |
Unit |
|
Length |
|
|
|
|
Diameter |
|
|
|
|
cross-sectional Area |
|
|
|
· Insert an image Load vs. displacement plot.
· Insert an image of your Stress vs. strain plot
o Carefully label the major points and regions on the stress-strain graph (elastic region, plastic region, necking region, proportional limit, yield strength, ultimate strength, 0.2% offset line). You can use Microsoft Word to label the points and regions on your graphs.
· Mechanical properties table
Table x. “Material” mechanical properties.
|
Parameter |
Value |
Unit |
|
Young’s modulus |
|
|
|
Proportional limit |
|
|
|
Yield strength |
|
|
|
Ultimate strength |
|
|
|
True stress |
|
|
|
Reduction of area |
|
|
|
Elastic energy density |
|
|
Discussion
· Answer both questions from the instructions under section “Instron: results, analysis, and reporting”
o Calculate the elastic energy density of the specimen up to the yield point. Discuss how this quantity is related to the Modulus of Resilience.
o Compare the calculated values with reference values from the internet. Name the sources of error and limitations. Discuss reproducibility (if someone else repeated the same experiment, would they get the same results as you? Why or why not?).
2. Manual tester (32 points)
2.1 Manual tester Methods
· Briefly explain:
o What instruments were used.
o What sample was tested.
o What was measured.
o How the measurements were taken, etc.
· Show all equations used for calculations in this experiment (Need to show the equations behind the calculations in your MATLAB code). Your equations don’t have to look pretty. They just need to be understandable.
2.2 Manual tester Results and Discussion
Results
· Sample material and measurements table
Table x. “Material” sample.
|
Parameter |
Initial value |
Unit |
|
Length |
|
|
|
Diameter |
|
|
|
cross-sectional Area |
|
|
· Load vs. displacement plot
· Stress vs. strain plot with the following labels
o Initial loading Young’s modulus by fitting a line to the linear part of the graph.
o Reloading Young’s modulus.
o Yield strength (0.2% offset)
o Ultimate tensile strength.
· Mechanical properties table
Table x. “Material” mechanical properties.
|
Parameter |
Value |
Unit |
|
Loading Young’s modulus |
|
|
|
Reloading Young’s modulus |
|
|
|
Yield strength |
|
|
|
Ultimate strength |
|
|
Discussion
· Answer the discussion question from instruction under section “Manual tester: results, analysis, and reporting”
3. Polariscope (22 points)
Procedure
Briefly explain what instrument were used, what sample(s) were tested, what was measured, how the measurements were taken, etc.
Results
· 3 photos of the first sample
o Photo of the sample with no load
o Photo of the sample where the stress starts to appear (Mark the region where stress starts to appear)
o Photo of the sample with maximum load (Mark the region where high stress starts to appear)
· 3 photos of the second sample
o Photo of the sample with no load
o Photo of the sample where the stress starts to appear (Mark the region where stress starts to appear)
o Photo of the sample with maximum load (Mark the region where high stress starts to appear)
Discussion
· Answer the discussion questions from the instructions under section “Polariscope: results, analysis, and reporting”
Appendix:
MATLAB code
* Do not use first person in technical lab reports! i.e., do not use “I” or “we”.
* Figures should be labelled by figure number, included in the body of the report and include legends, if appropriate.
* Graphs are figures and therefore should be numbered consecutively within the body of the report. Both axes on a graph must be labeled with units.
* Tables should be labeled by table number and included in the body of the report. Note that it is preferable to have Figures and Tables close to the text where they are discussed so copy and paste them into the body of the report.
