The Mohr's circle is named after the German engineer Christian Mohr. It is a graphic representation of the compressive and tensile stresses on a point within the plane. The axes of a Mohr's circle are known as the abscissa axis, which represents the normal stress, and the ordinate axis, which represents the shear stress. Whenever performing calculations on a Mohr's circle, it is important to find the pole of the stress, which provides angles on which to base further calculations.
Instructions
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1
Locate the orientation of the stress applied to the Mohr's circle compared to the ordinate and abscissa axes of the Mohr's circle. For example, a stress may be 22 degrees to left of the positive Y axis.
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2
Rotate the stress 90 degrees clockwise. In this example, the stress would be rotated so that it is 22 degrees above the positive X axis.
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3
Draw the pole, which should be at a 90-degree angle clockwise and perpendicular to the stress.