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Unformatted text preview: The members have the elastic moduli given above. Determine the reactions at B and D when a force P is applied at the junction C. 3) (20 pts.) Knowing that a force P of magnitude 50 kN is required to punch a hole of diameter d=20 mm in an aluminum sheet of thickness t=5 mm, determine the average shearing stress in the aluminum at failure. 4) (20 pts.) Rotation is prevented at the lower end (at B and D) of each shaft. A torque of T=75 N.m is applied to end A of shaft AB. G= 80 GPa for both shafts. The upper plate does not pose any resistance to rotation of the shafts at A and C. Determine a) the maximum stress in shaft CD, b) the angle of twist at C. 5) (20 pts.) The stepped shaft shown must transmit 40 kW at a speed of 720 rpm. Determine the minimum radius of the fillet if an allowable stress of 50 MPa is not to be exceeded....
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- Fall '09