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05-06ChapGere.0004 - 366 A-PDF Stresses in Beams CHAPTER 5...

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Solution 5.12-13 Steel block loaded by cables 366 CHAPTER 5 Stresses in Beams d P e t Steel block t 2 P 1200 lb d 0.25 in. t 1.0 in. b width of block 3.0 in. C ROSS SECTION OF BLOCK A bt 3.0 in. 2 (a) M AXIMUM TENSILE STRESS ( AT TOP OF BLOCK ) 400 psi 1500 psi 1900 psi 1200 lb 3 in. 2 (1200 lb)(0.625 in.)(0.5 in.) 0.25 in. 4 s t P A Pey I y t 2 0.5 in. I 1 12 bt 3 0.25 in. 4 e t 2 d 2 0.625 in. M AXIMUM COMPRESSIVE STRESS ( AT BOTTOM OF BLOCK ) 400 psi 1500 psi 1100 psi (b) I F d IS INCREASED , the eccentricity e increases and both stresses increase in magnitude. 1200 lb 3 in. 2 (1200 lb)(0.625 in.)( 0.5 in.) 0.25 in. 4 s c P A Pey I y t 2 0.5 in. Problem 5.12-14 A bar AB supports a load P acting at the centroid of the end cross section (see figure). In the middle region of the bar
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