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February 27, 2015

February 27, 2015

Posted by **Nick** on Thursday, August 19, 2010 at 6:50am.

- college- strength of material -
**drwls**, Thursday, August 19, 2010 at 7:32amStress equals load divided by cross sectional area of test sample.

Strain equals [(Final length)-(Initial Lelngth)]/(Initial Length)

Since you have only one data point, all you can plot is the stress (y axis) and strain (x axis) corresponding to breakage or yielding.

At loads less than the failure load, there should have been a linear relationship between stress and strain, with a slope equal to Young's modulus for the material. However, you say that you have no data points in this regime.

Reading this article may help you:

http://en.wikipedia.org/wiki/Stress%E2%80%93strain_curve

- college- strength of material -
**Nick**, Thursday, August 19, 2010 at 8:11amThnx drwl but i knw the fomulas but i dnt knw hw to plot a graph wen juz max load is given.

- college- strength of material -
**drwls**, Thursday, August 19, 2010 at 9:28amYou can plot one point. That is all. If you were not told how much the sample stretched, you cannot even plot that.

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