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I want to plot the stress-strain chart for a specimen after a test.

In the output file of excel, I have "Strain of transmitted bar" and "Strain of the incident bar"

I also have Young's modulus of the bar which is 209 GPa, other data are:

  • Diameter of the bar = 21 mm
  • P wave velocity = 5100 m/s
  • Length of the striker = 200 mm

I do not know how to get the specimen strain from these data so I can have the whole "strain" and then plot the chart?

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