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Unformatted text preview: EM 319 Mechanics of Solids Fall 2010 Homework #1 Due: 9/2/2010 1. Loads are applied at sections A, B, C, and D. If the bar has a crosssectional area of 3 in 2 , determine the stress in the bar a. On a section 10 in. to the right of A b. On a section 60 in. to the right of A Fig. P1 Solution: 2. Axial loads are applied with rigid bearing plates to the concrete structure shown in Fig. P2. The crosssectional areas for the concrete sections are 15,000 mm 2 for AB, 3000 mm 2 for BC and 10,000 mm 2 for CD. Determine the axial stress in the concrete. a. On a cross section in the interval AB b. On a cross section in the interval BC c. On a cross section in the interval CD Fig. P2 Solution: 3. A 2024T4 aluminum tube with a wall thickness of 0.120 in. and an outside diameter of 1.000 in. is used as a compression member. Determine the axial load on the member when the axial stress is 30 ksi. Solution: 4. The round bar of Fig. P4 has steel, brass, and aluminum sections. Axial loads are applied at cross sections A, B, C and D. If the allowable axial stresses are 125 MPa in the steel, 70 MPa in the brass, and 85 MPa in the aluminum, determine the required diameters for each of the sections....
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This note was uploaded on 09/10/2010 for the course EM 13785 taught by Professor Hallali during the Fall '10 term at University of Texas at Austin.
 Fall '10
 Hallali

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