steel wood

steel wood - Executive Summary TO: Grace Hsuan FROM:...

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Executive Summary TO: Grace Hsuan FROM: SUBJECT: Aggregate Test DATE: February 6, 2008 Per your request, I have analyzed the reinforcing steel bar and wood. A tensile test was performed on the reinforcing steel bar. The steel was determined to be number 5-bar and grade-60 steel. It had a yield stress of 401 MPa (58,255 psi) and an ultimate stress of 556 MPa (80,719 psi). The modulus of Elasticity is about 20 GPa (3x10 6 psi). The steel showed necking right before it broke. The wood had three tests performed on it the first was a compression test with the load applied parallel to the wood grain. The first failure of the specimen occurred at 54.78 MPa (7950 psi) and the ultimate stress is 60.29 MPa (8750 psi). The next test that was performed was a compression test with the load applied perpendicular to the wood grain. The stress at 0.1-inch deformation was 4.38 MPa (635.75 psi), which was at a greater position change than the ultimate stress (4.44 MPa, 645.00 psi). The first failure occurred at a stress of 2.71 MPa (393.75 psi). Lastly, a flexure test was performed on a wood specimen. The flexure test had the highest stresses in the wood. The first failure occurred at 104.64 MPa (15,188 psi). The ultimate stress of 141.07 MPa (20,475 psi) happened when the maximum load of 8096 newtons (1820 pounds) was applied.
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Description of Test Procedures: Tensile Properties of Steel Reinforcing Bar 1. Grind down an area of reduced cross-sectional area at the center (gauge region) of the bar, and measure the cross-sectional area of this region. 2. Mount the bar firmly into the end grips of the test machine. Attach the extensometer to
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This note was uploaded on 04/03/2008 for the course CIVE 250 taught by Professor Hsuan during the Spring '08 term at Drexel.

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steel wood - Executive Summary TO: Grace Hsuan FROM:...

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