188_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

188_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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Unformatted text preview: Sec_2.6.qxd 182 9/25/08 11:40 AM Page 182 CHAPTER 2 Axially Loaded Members Solution 2.6-7 Tension test (b) MAXIMUM SHEAR STRESS The maximum shear stress is on a 45° plane and equals x/2. tmax Elongation: 0.00120 in. (2 in. gage length) Strain: â 0.00120 in. 2 in. x E (30 ; 9,000 psi (c) STRESS ELEMENT AT d L Hooke’s law: sx 2 45° 0.00060 106 psi)(0.00060) 18,000 psi (a) MAXIMUM NORMAL STRESS x is the maximum normal stress. max 18,000 psi NOTE: All stresses have units of psi. ; 45∞ Problem 2.6-8 A copper bar with a rectangular cross section is held without stress between rigid supports (see figure). Subsequently, the temperature of the bar is raised 50°C. Determine the stresses on all faces of the elements A and B, and show these stresses on sketches of the elements. 17.5 10 6/°C and E 120 GPa.) (Assume A B Solution 2.6-8 Copper bar with rigid supports MAXIMUM SHEAR STRESS tmax T 50°C (Increase) 17.5 E sx 2 52.5 MPa STRESSES ON ELEMENTS A AND B 10 6/°C 120 GPa STRESS DUE TO TEMPERATURE INCREASE x E ( T) (See Eq. 2-18 of Section 2.5) 105 MPa (Compression) NOTE: All stresses have units of MPa. ...
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This note was uploaded on 12/22/2011 for the course MEEG 310 taught by Professor Staff during the Fall '11 term at University of Delaware.

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