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Random orentations of wire.

The purpose of our project is to test the maximum tensile strength of several different composites using the same kind of wire. The wire will be arranged at different orientations and the matrix, plaster of Paris. After the plaster has cured, a weight will be applied to the composite (bar) measuring the tensile strength. Cut wires to their specified length. Place wires in the matrix. Pour plaster into the matrix. Wait for plaster to cure. After plaster has cured, break the bars and calculate the PSI. Figure the strain stress diagram by stretching wires and measuring their length after each weight increment.

The straight four wires stretched across the matrix without any crosses in it had the highest PSI with an of 915.9. The second orientation that withstood the next greatest load was the composite with the zigzagged pattern. This composite had a wire stretched across the top of the matrix, two zigzagged wires, then another straight wire stretched across the bottom of the two zigzagged wires. The zigzagged pattern withstood 913.7 PSI. The control had a PSI of 616.1 and had no wires. The other orientation had a PSI of 479.2, which was less than the control.

Levi and Luke Klausner, Woodlin School.
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Author:Klausner, Levi; Klausner, Luke
Publication:Journal of the Colorado-Wyoming Academy of Science
Article Type:Brief Article
Geographic Code:1USA
Date:Apr 1, 2001
Words:208
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