Question: Consider a three-dimensional state of stress characterized by: xx = 3,000 yy = 2,000 xy = 0. zz = 4,000 zx = 0. yz =

Consider a three-dimensional state of stress characterized by:
σxx = 3,000 σyy = 2,000 τxy = 0.
σzz = 4,000 τzx = 0. τyz = 2,500
where units are psi and compression is positive. Find: the magnitude and direction of the principal stresses and illustrate with a sketch

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