For a plane stress state, in the original Oxy system we know the component Ox = 120 MPa and Txy = 60 MPa. After the element (see the left figure) is rotated counterclockwise by 45°, we know the stress...

Extracted text: For a plane stress state, in the original Oxy system we know the component Ox = 120 MPa and Txy = 60 MPa. After the element (see the left figure) is rotated counterclockwise by 45°, we know the stress component Txryı = -60 MPa in the new Ox'y' system (see right figure). Determine the two principal stresses and the absolute maximum shear stress (ra). y Oy Txıy! x' Txy Ox 45 х