Calculator Introduction 
For a given stress state (s_{x}, s_{y}, and t_{xy}) and safety factor, this calculator applies the maximum normal stress criterion and Mohr's theory to check if the principal stresses exceed the given tensile strength (s_{t}) or compressive strength (s_{c}).
Inputs

Equations behind the Calculator 
The formulas used in this calculator are based on the following graphic,
Further detail is provided in the brittle materials failure criteria page. 