This paper describes a simple apparatus we have developed for determining elastic properties of materials. The easily constructed system may be used to measure the elongation or compression of a sample to which a succession of loads is applied. This allows stress‐strain curves to be plotted and analyzed. We describe the construction and use of the apparatus and present some sample data.

Jerry D. Wilson, Anthony J. Buffa, and Bo Lou, College Physics, 6th ed. (Pearson Prentice Hall, 2007), pp. 298–301.
We used Maytec® aluminum profiles (see, for example,
Range 0–5 mm, resolution 0.01 mm, available, for example, from‐GB100000001.
Range 0–10 kg, resolution 1 g, available from, for example, 5101.
Interested readers may contact the corresponding author for more detailed construction specifications.
50‐mm diameter EPP, density = 50 kg·m−3.
A section of a 3‐mm diameter neoprene O‐ring.
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