The shaft consisting of steel and aluminum segments carries the torques T and 2T as shown in the figure. Find the largest allowable value of T if the allowable shear stresses are 83 MPa for steel and 55 MPa for aluminum, and the angle of rotation at the free end must not exceed 6°. Use G = 83GPa for steel and 28 GPa for aluminum. 2T 50 mm dia 40 mm dia T Steel 900 mm Aluminum 600 mm

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