Unless noted otherwise, neglect the weights of the members in these problem.For the elemen...

Unless noted otherwise, neglect the weights of the members in these problem.

For the elements shown in Problem, use Mohr’s circle to determine

(a) the principal stresses and the orientation of the principal planes

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(b) the maximum shear stress

Problem

Stresses developed at a point in a machine part are shown acting on infinitesimal elements. For each element, calculate

(a) the normal and shear stress intensities on a plane, the normal of which is inclined at an angle of 60° counterclockwise from the X–X axis

(b) the principal stresses and the orientation of the principal planes

(c) the maximum shear stress