# HW1 - EM 319 Mechanics of Solids Fall 2010 Homework#1 Due 1...

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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 cross-sectional 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 2. Axial loads are applied with rigid bearing plates to the concrete structure shown in Fig. P2. The cross-sectional 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 3. A 2024-T4 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.

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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
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HW1 - EM 319 Mechanics of Solids Fall 2010 Homework#1 Due 1...

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