Question: A given plane stress state is shown here. Which one of the following statements is incorrect? To a. The direction of maximum shear stress

A given plane stress state is shown here. Which one of the following statements is incorrect? To a. The direction of maximum shear stress and the direction of maximum principal stress are 45 apart. b. In the xy-plane the sum of the two principal stresses is c. In the xy-plane the two principal directions are perpendicular to each other. d. The normal stress in the z-direction is zero. e. 2 1/2 The maximum shear stress is + To'

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