Problem 5-19/5-20/5-21/ Engineering Mechanics Materials

Engineering Mechanics problem with solution
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5–19. The shaft consists of solid 80-mm-diameter rod segments AB and CD , and the tubular segment BC which has
an outer diameter of 100 mm and inner diameter of 80 mm. If the material has an allowable shear stress of tallow = 75 MPa,
determine the maximum allowable torque T that can be applied to the shaft.

5–20. The shaft consists of rod segments AB and CD , and the tubular segment BC . If the torque T = 10 kN m is applied to the shaft, determine the required minimum diameter of the rod and the maximum inner diameter of the tube. The outer diameter of the tube is 120 mm, and the material has an allowable shear stress of tallow = 75 MPa.

5–21. If the 40-mm-diameter rod is subjected to a uniform distributed torque of t0 = 1.5 kN/
mNm, determine the shear stress developed at point C .