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.

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Jerry D. Wilson, Anthony J. Buffa, and Bo Lou, College Physics, 6th ed. (Pearson Prentice Hall, 2007), pp. 298–301.
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We used Maytec® aluminum profiles (see, for example, www.arthurgrussell.com/maytec.shtml).
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Range 0–5 mm, resolution 0.01 mm, available, for example, from www.newark.com/jsp/search/productdetail.jsp?SKU=59M4791&CMP=AFC‐GB100000001.
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Range 0–10 kg, resolution 1 g, available from, for example, www.affordablescales.com/scales_specsasp?specs=569&Acculab_VIC 5101.
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Interested readers may contact the corresponding author for more detailed construction specifications.
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50‐mm diameter EPP, density = 50 kg·m−3.
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A section of a 3‐mm diameter neoprene O‐ring.
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