ENG1011 Engineering Methods - MUM S1 2025
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What internal action(s) causes a beam to curve?
The following file contains data from a tensile test of a sample of acrylic sheet, from the same batch as was used to create the meccano pieces in your bridge kit.
You can download the data file here.Save the data to your computer, open it in a spreadsheet (e.g. Excel), and use the data to answer the following questions
(a) Find the ultimate tensile stress of the material MPa(b) Estimate the elastic modulus of the material GPa(c) The acrylic doesn't have a clear yield point. Instead, estimate the 0.2% proof stress of the material to give you a measure of where plastic deformation starts. MPa(d) Estimate the toughness of the material MJ/m3(e) Calculate the force that would be required to break a 20 mm diameter rod of this material NWhat was the difference between
- the length of the Al 6063 sample while the force in question 2(b) is being applied, and
- the length of the Al 6063 sample after the force in question 2(b) has been released?
Give your answer in mm, to at least 2 significant figures
If the screen is showing that the sample is in tension after you have mounted the sample, what can you do to release the tension?
What does an extensometer measure?
The crosshead/jaw can be adjusted while another team member is mounting the sample.
Lab coat is required for the tensile test
Safety glasses is not required if you are just observing the tensile test
Closed-toe shoes must be worn to the practical class.
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