Consider a two-dimensional state of stress in the xy plane characterized by: xx = 35.86 yy =

Question:

Consider a “two-dimensional” state of stress in the x–y plane characterized by:
σxx = 35.86 σyy = 17.24 τxy = −25.52
Where units are MPa and tension is positive. Find: the magnitude and direction of the principal stresses and illustrate with a sketch.