Question: 4 . a ) For an infinitesimal element normal and shearing stress in the two mutually perpendicular planes are shown in figure below. Determine the

4 .

)

For an infinitesimal element normal and shearing stress in the two mutually perpendicular planes are shown in figure below. Determine the normal and shearing stress on the inclined plane at an angle of

\ (30^{\

circ

} \)

with vertical. Also calculate principal stresses their planes, maximum shear stress and their planes. Verify your result using 'Mohr's circle.

4 . a ) For an infinitesimal element normal and

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