Lab Report 2

Lab Report 2 - Lab Report #2: Poisson's Ratio Date...

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Lab Report #2: Poisson’s Ratio  Name: Matt Turner Date Submitted: 1/17/08 Section 10-12 Thursday Group Members: 1. John Matthews Title: Poisson’s Ratio of Al Alloy 2024-T351 Equipment : Tinius Olsen Hydraulic 60 kips Universal Tester Strain Gages (Gage Factor = 2.11) Specimen : Al Alloy 2024-T351 Abstract A load, increasing at constant increments, was applied to a standard 0.5” round specimen of Al Alloy 2024-T351, in order to determine values for Poisson’s Ratio, Elastic Modulus, and Shear Modulus. These values were determined to be .3171, 10.329 Msi, and 6.802 Msi, respectively. Of these values, only the Shear Modulus exceeded the minimum specified for this alloy, while the other two were both within 5% of the minimum. As the results were close to the expected values, the experiment was a success.
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Poisson's Ratio Test: Al alloy 2024-T351 Gage Factor Diameter (in) Area (in 2 ) 2.11 0.505 0.2003 Load (lb) e_Axial (µin/in) e_Transverse (µin/in) Stress (psi) 490 251 -65 2446.3773 1005 484 -132 5017.5698 1505 724 -203 7513.8732 2000 958 -278 9985.2136 2505 1145 -355 12506.48 3000 1425 -430 14977.82 3500 1675 -509 17474.124 4000 1918 -588 19970.427 4500 2180 -667 22466.731 5000 2405 -745 24963.034 4500 2180 -669 22466.731 4000 1913 -584 19970.427 3500 1682 -509 17474.124 3000 1444 -433 14977.82 2500 1194 -351 12481.517 2000 953 -274 9985.2136 1500 710 -198 7488.9102 1000 477 -126 4992.6068 500 216 -50 2496.3034
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y = 10.329x + 128.42 R 2 = 0.9994 0 5000 10000 15000 20000 25000 30000 0 200 400 600
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Lab Report 2 - Lab Report #2: Poisson's Ratio Date...

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