A structural member supports loads, which produce at a particular point, a state of pure shear stress of $50 \mathrm{~N} / \mathrm{mm}^{2}$. At what angles are the principal planes oriented with respect to the plane of pure shear?

(A) $\pi / 6$ and $2 \pi / 3$

(B) $\pi / 4$ and $3 \pi / 4$

(C) $\pi / 4$ and $\pi / 2$

(D) $\pi / 2$ and $\pi$

A structural member supports loads, which produce at a particular point, a state of pure shear stress of $50 \mathrm{~N} / \mathrm{mm}^{2}$. At what angles are the principal planes oriented with respect to the plane of pure shear?

(A) $\pi / 6$ and $2 \pi / 3$

(B) $\pi / 4$ and $3 \pi / 4$

(C) $\pi / 4$ and $\pi / 2$

(D) $\pi / 2$ and $\pi$

1 Answer

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