Calculator Introduction 
Given the stress components s_{x}, s_{y}, and t_{xy}, this calculator computes the principal stresses s_{1}, s_{2}, the principal angle q_{p}, the maximum shear stress t_{max} and its angle q_{s}. It also draws an approximate Mohr's cirlce for the given stress state.
Inputs


The Mohr's circle associated with the above stress state is similar to the following figure. However, the exact loaction of the center s_{Avg}, the radius of the Mohr's circle R, and the principal angle q_{p} may be different from what are shown in the figure.

Equations behind the Calculator 
The formulas used in this calculator are,
Further information can be found in the plane stress, Mohr's Circle, and the Mohr's Circle usage pages. 