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Unformatted text preview: Tutorial 6: Torsion, Bending and Twisting 1. A shaft is made from a steel alloy having an allowable shear stress of τ allowed = 84 MN/m 2 . If the diameter of the shaft is 40 mm, determine the maximum torque T that can be transmitted. What would be the maximum torque T, if a 25 mm diameter hole is bored through the shaft. Sketch the shear stress distribution along the radial line in each case. Answer: 1056 Nm; 895 Nm. 2. A solid steel rod 25 mm in diameter, is subjected to a twisting moment of 138 Nm and is found to twist through an angle of 27.5 minutes measured over a length of 200 mm. Find the modulus of rigidity and maximum shearing stress. Answer:90 GPa, 45 MN/m 2 . 3. A shaft of 20 cm in diameter is subjected to an axial couple of 120 kNm. Calculate the greatest shearing stress set up. If a 5 cm axial hole is bored along a certain length of a shaft, determine the increase in the maximum shearing stress for this length of the shaft and the ratio of the angles of twist, per unit length, in the bored and unbored parts. length of the shaft and the ratio of the angles of twist, per unit length, in the bored and unbored parts....
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 Spring '09
 GXXY

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