307_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

307_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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Unformatted text preview: Sec_3.5-3.7.qxd 9/27/08 1:10 PM Page 301 301 SECTION 3.7 Transmission of Power INTERNAL TORQUES Segment BC: TAB 1492 N m TBC 895.3 N m fBC DIAMETER BASED UPON ALLOWABLE SHEAR STRESS fBC 32 TBCLBC 32(895.3 N # m)(0.9 m) pGd 4 p(75 GPa)d 4 0.1094 * 10 d4 The larger torque occurs in segment AB tmax d3 16 TAB d pd 3 16 TAB pt allow 3 0.0001520 m3 d 16(1492 N # m) p(50 MPa) 0.0534 m 53.4 mm From A to C: fAC ( 4 IP pd 32 TL GIP f 32TL and d pGd 4 fAB fAB + fBC 0.06981 rad 0.1094 * 10 d 4 0.04933 m 49.3mm Segment AB: fAB AC)allow 0.06981 DIAMETER BASED UPON ALLOWABLE ANGLE OF TWIST 6 SHEAR STRESS GOVERNS 32 TABLAB pGd 32(1492 N # 4 0.3039 * 10 d4 m)(1.5 m) p(75 GPa)d 6 4 d 53.4mm ; 6 0.4133 * 10 d 4 6 ...
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