A steel bar has a rectangular cross section 12.7 mm wide and 38.1 mm deep. The bar is subj...

A steel bar has a rectangular cross section 12.7 mm wide and 38.1 mm deep. The bar is subjected to a twisting moment T = 135.7 N • m. The shear yield stress of the material is 82.7 MPa.

a. By Eq. 6.64, calculate the maximum shear stress in the bar and show in a diagram where it occurs.

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b. Calculate the shear stress in the bar at the center of the-short side.

 (6.64)