Lab 2 - Lab 2 Compression and Hardness Prof Ange-Therese...

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Lab 2: Compressionand HardnessProf. Ange-Therese AkonoColin P. RuebDepartment of Civil and Environmental EngineeringSpring 2014
Two Labs in OneExperiment #1: Compression TestObserve behavior of materials under compressionCompare with tensile behaviorExperiment #2: Hardness TestLearn Rockwell, Brinell, and Vickers methods and how to convert between hardness scalesInvestigate differences between HRB and HRCRelate hardness to other engineering properties
Experiment #1: CompressionMaterialsCast iron1045 normalized steel 7075-T6 aluminumPMMA
SetupLoad cell limit = 100 kNExtensometer limit 15%Load rates:Metals: 2.5 mm/minPlastic: 5.0 mm/minDO NOT USE EXTENSOMETER ON PMMAFor PMMA, use crosshead position to determine strain:You will have to calculate the strain using the crosshead position (i.e. include a sample calculation)00lll
Compression vs. TensionE, y, u*, and stressstrain plots*Lower bound ultimate stressTrue vs. engineering stress and strain

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