02-04ChapGere.0004

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Solution 2.6-6 Steel bar in tension SECTION 2.6 Stresses on Inclined Sections 125 P 5 9.5 kN (a) M AXIMUM NORMAL STRESS (b) M AXIMUM SHEAR STRESS The maximum shear stress is on a 45 8 plane and equals s x /2. t max 5 s x 2 5 42.0 MPa s max 5 84.0 MPa s x 5 P A 5 9.5 kN p 4 (12 mm) 2 5 84.0 MPa (c) S TRESS ELEMENT AT u 5 45 8 N OTE : All stresses have units of MPa. P = 9.5 kN P d = 12 mm y x 0 9,000 9,000 9,000 9,000 9,000 9,000 u = 45 ° Problem 2.6-7 During a tension test of a mild-steel specimen (see figure), the extensometer shows an elongation of 0.00120 in. with a gage length of 2 in. Assume that the steel is stressed
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