Question

CEE 216 Civil Engineering Materials Steel 1. A 32-mm rebar with a gauge length of 200 mm was subjected to tension to fracture according to ASTM E-8 method. The load and deformation data collected are shown in Table 1. Create a spreadsheet to complete the following. Table 1. Load and displacement data for a 32-mm rebar sample subjected to an increasing tensile load a. Create a plot of stress-strain. Label the axes and show units. Load Displacement b. Create a separate plot of the linear portion of the stress- strain relationship. Determine the modulus of elasticity from the graph by using a best-fit line. 0 62.2 0.1 188.9 0.2 329.8 0.4 383.4 |1.7 426.0 4.0 447.3 5.9 462.5 7.2 472.9 8.4 487.1 9.7 496.4 11.1 505.7 12.4compression of 200kN. Assuming the Modulus of Elasticity 512.8 13.7 522.6 15.3 532.4 18.5 525.9 22.4 c. Find the Proportional Limit, Yield stress, and Ultimate stress for the steel sample d. If the rebar is loaded to 390 kN and then unloaded, what is the permanent change in length? 2. A steel pipe having a length of 1m, an outside diameter of 0.2 m, and a wall thickness of 10 mm, is subjected to an axial of 200 GPa and a Poisson's ratio of 0.3, find the following. a. The shortening of the pipe, b. the increase in the outside diameter, and c. the increase in wall thickness. 3. A Charpy V Notch test was conducted for an ASTM A457 the test results at four different test temperatures were found to be Grade 50 bridge steel. The average values of 10 ft.lb at -50°F, 15 ft.lb at 0°F, 40 ft.lb at 40'F, and 60 ft. lb at 100°F The bridge will be located in a region where specifications require a minimum of 25 ft.lb fracture toughness at 30°F for welded fracture-critical members. If the bridge contains a welded flange in a fracture-critical member, does the steel have an adequate Charpy V notch fracture toughness? Show your supporting calculations.

i only need help with Q3

Answer 1

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