Which software for a stress-strain curve?

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Discussion Overview

The discussion revolves around the challenges of plotting a stress-strain curve using software, specifically focusing on the calculation of parameters such as σ0.2, σmax, and σ0.5 from experimental data. Participants explore various software options and their capabilities in handling these tasks.

Discussion Character

  • Technical explanation, Debate/contested, Homework-related

Main Points Raised

  • One participant expresses difficulty in using Excel and Octave for plotting stress-strain curves and calculating specific parameters, seeking an easier solution.
  • Another participant asserts that Excel can calculate the required parameters if used correctly and questions the original poster's understanding of these parameters.
  • The original poster confirms understanding of the parameters but mentions challenges with drawing parallel lines and calculations due to the discrete nature of the data.
  • A later reply supports the use of Excel, emphasizing its power and capability for the calculations involved.

Areas of Agreement / Disagreement

Participants generally agree that Excel is a viable tool for the calculations, but there is some uncertainty about the ease of implementation and the original poster's ability to use it effectively.

Contextual Notes

There are limitations regarding the original poster's experience with Excel and the specific methods for calculating and plotting the required parameters, which remain unresolved.

hern
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Hi everyone,

I'm trying to draw a stress-strain curve with data collected from the test itself. I have no problem plotting the points obtained, but I can't figure out how to graphically or at least with some kind of software aid, to get results (σ0.2, σmax, σ0.5, and so on).

I tryed with excel, but even though I can draw lines on the graphic by hand, it's not the most precise thing. Also with octave, but drawing aditional lines over the curve involves interpolation and it's lots of work for just a few lines.

Does somebody have an "easy" solution for this?

cheers!
 
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Excel is more than capable of calculating all of the parameters you have listed, it need only be properly implemented.

Do you understand what each of the parameters is, and how they are calculated?
 
Hello, and thank you for your reply.

Yes I understand the parameters, and even with the ones I'm not so sure about, I have a few textbooks to go to.

My question was mainly because of the hook's line (I don't know the actual name in english), and the other parallel lines I have to draw (with the same slope, but starting from a given percentage of deformation).

Now that you state it so firmly, I guess it really could be done with excel, but as it is a discrete set of data, it wouldn't be so "direct" to do the calculations.

I'll give it another try, maybe it's simpler than I thought.

Thanks again.
 
Yes excel is a great and powerful tool for us to work with. I would also use it for this calculations
 

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