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Unformatted text preview: Refer to lab handout. Results and Calculations: Young’s modulus: E = σ ε E : Young’s modulus σ : Stress ε : Strain σ t = σ(1+ε) ε t = ln(1+ε) σ t : True stress ε t : True strain The modulus can be found by calculating the slopes of the graphs. The modulus for each of the samples are: Aluminum 1: 147.8191-61.96969 = 26.673 MPa 0.00474603-0.00152746 Aluminum 2: 157.7952531-49.9389 = 19.93 MPa 0.00664478-0.001237 Steel: 183.9418-64.436 = 55.434 MPa 0.0029894-0.0008336 Discussion and Conclusion: The Young’s modulus for one of the samples of aluminum is 26.673 Mpa and 19.93 Mpa for the other sample. The Young’s modulus for steel was found to be 55.434 Mpa. The fracture points of the two samples of aluminum were at stresses of 64.83MPa and 66.60 Mpa respectively and the fracture point for the steel sample occurred under a stress of 182.05Mpa.The conclusion is that aluminum is more ductile than steel....
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This note was uploaded on 06/02/2008 for the course MECHANICAL 223,224,22 taught by Professor Ibrahim,sadek,johnwats, during the Spring '08 term at American University of Sharjah.
- Spring '08