Lab 1 - The Tension Test

Lab 1 - The Tension Test - Procedure: Did not deviate from...

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Procedure: Did not deviate from process described in lab manual. Questions: 1) See attached graphs for labeled axis. Determining scales: Slope = Rise/Run = (18*600K)/(9.1*0.02in) See attached for specimen sketches. 2) Average Std. Max Strength for aluminum 2773.7 kips 113.9 Max strength for steel 5704.6 kips 50.65 Slope for aluminum 5.6*10^5 1.15*10^5 Slope for steel 1.68*10^6 0.38*10^6 3) a) Young’s Modulus: Aluminum: 9.02 Mpsi Steel: 27.41 Mpsi b) Maximum stress: Maximum stress = max strength/cross sectional area Groups Team Aluminum 44.7 ksi 42.3 ksi Steel 51.5 ksi 51.8 ksi c) Yield Stress: Yield stress = strength at yield point/cross sectional area Team Aluminum 40.09 Steel 35.2 d) Discrepancy of max stress Discrepancy of yield stress Discrepancy of E Aluminum 0.67% 0.225% 9.8% Steel 3.6% 10% 8.6% Discrepancy = (textbook value – measured value)/textbook value Variation between tests of the same material is represented by the Std. of the four sets of values. The variations in test results are mostly due to variability in the specimen.
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This note was uploaded on 04/29/2008 for the course ENGRD 2020 taught by Professor Zehnder during the Spring '06 term at Cornell.

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Lab 1 - The Tension Test - Procedure: Did not deviate from...

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