Steel_Design_HW2_F11

# Steel_Design_HW2_F11 - CES 4605 Steel Design Homework 1 Due...

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(Please, turn the page) CES 4605 Steel Design Homework # 1 Aug 26, 2011 Due Date: Sep 2 2011 Part I (30 points) – Tension Test. A tensile test was conducted on a solid, circular-section specimen with diameter 1.25 inch. The “gage length” (initial, longitudinal length of specimen) is L 0 =5.50 inches. The deformation was measured within this length. The test data are shown below. Deformation of the coupon, Δ L (inches) External force applied to the coupon, F (kips) Please : a. Draw best-fit (least squares) line to obtain stress-strain curves , after determining the stress-strain curve from force/deformation table shown to the left (please, use engineering stress and engineering strain). . b. Estimate the proportional limit . c. Use the slope of the best-fit line to estimate the Modulus of Elasticity. d. Estimate the 0.2% offset yield strength. e. Estimate the ultimate stress . f. If a load of 50.0 kips is applied and then removed, estimate the permanent deformation in inches (Hint: Is the elastic/plastic limit going to be exceeded?).

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Steel_Design_HW2_F11 - CES 4605 Steel Design Homework 1 Due...

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