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Theory of Structures - Engineering

Q1:

The locus of the end point of the resultant of the normal and tangential components of the stress on an inclined plane, is

A circle

B parabola

C ellipse

D straight line.

ANS:C - ellipse

Answer must be circle.

The point of which locus is asked is the point presentation of the circumference of Mohr circle (at the intersection of a line drawn from the origin (resultant) and vertical line intersecting circle and x-axis (tangential/shear stress of oblique plane).