A thin walled tube has a pentagonal cross-section as shown in the figure. Note that the figure is hollow and the red shade denotes only the area bounded by the median line. If one side of the pentagonal shaded area is a = 469 mm, determine the torsional stress in MPa. Use Torque, T = 44 kN-m, thickness, t = 9 mm, shear modulus, G = 78 GPa, and length, L = 10 m. a a a

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Pressure and Stress