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A3 - (2(b If the shear stress in shaft(1 must be limited to...

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CIV 207 – Winter 2009 Assignment #3 Friday, January 23rd Complete the first three questions. Submit your work to Box #5 on the 4 th floor of the MacDonald building by 12 noon on Tuesday February 3 rd . No late submissions will be accepted. The second set of three questions are for practice only. Groups of up to 3 members are permitted. Clearly print your names and student numbers on your submission. Ensure that the submission is properly stapled. 6.18 A compound steel [G = 80 GPa] shaft consists of solid 30-mm-diameter segments (1) and (3) and tube segment (2), which has an outside diameter of 60 mm and an inside diameter of 50 mm. Determine: (a) the maximum shear stress in tube segment (2). (b) the angle of twist in tube segment (2). (c) the rotation angle of gear D relative to gear A. 6.62 The motor shown supplies 25 kW at 6 Hz at A. The bearings shown permit free rotation of the shafts. (a) Shaft (2) is a solid 30-mm-diameter steel shaft. Determine the maximum shear stress produced in shaft
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Unformatted text preview: (2). (b) If the shear stress in shaft (1) must be limited to 40 MPa, determine the minimum acceptable diameter for shaft (1) if a solid shaft is used. 6.86 A solid 1.50-in.-diameter brass [G = 5,600 ksi] shaft [segments (1), (2), and (3)] has been stiffened between B and C by the addition of a cold-rolled stainless steel tube (4). The tube has an outside diameter of 3.50 in., a wall thickness of 0.12 in., and a shear modulus of G = 12,500 ksi. The tube is attached to the brass shaft by means of rigid flanges welded to the tube and to the shaft. If a torque of 400 lb-ft is applied to the shaft as shown, determine: (a) the maximum shear stress magnitude in segment (1) of the brass shaft. (b) the maximum shear stress magnitude in segment (2) of the brass shaft (i.e., between flanges B and C) (c) the maximum shear stress magnitude in the stainless steel tube (4). (d) the rotation angle of end D relative to end A. For practice 6.21 6.55 6.90...
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