Mohr's circle
（重定向自Mohr circle）
![Figure 1. Mohr's circles for a three-dimensional state of stress](/Images/godic/202501/27/Mohr_Circle.svg3812.png")
![Figure 2. Stress in a loaded deformable material body assumed as a continuum.](/Images/godic/202501/27/Stress_in_a_continuum.svg3812.png")
![Figure 3. Stress transformation at a point in a continuum under plane stress conditions.](/Images/godic/202501/27/Stress_transformation_2D.svg3813.png")
![Figure 4. Stress components at a plane passing through a point in a continuum under plane stress conditions.](/Images/godic/202501/27/Stress_at_a_plane_2D.svg3813.png")
Mohr's circle, named after Christian Otto Mohr, is a two-dimensional graphical representation of the transformation law for the Cauchy stress tensor.
After performing a stress analysis on a material body assumed as a continuum, the components of the Cauchy stress tensor at a particular material point are known with respect to a coordinate system. The Mohr circle is then used to determine graphically the stress components acting on a rotated coordinate system, i.e., acting on a differently oriented plane passing through that point.