Rankine's criterion

Maximum-Normal-Stress Theory

A brittle material will fail when the maximum tensile stress in the material reaches a value that is equal to the ultimate normal stress the material can sustain when subjected to simple tension.
For plane (biaxial) stress:

\begin{matrix} | σ_{1} | = σ_{u l t} \\ | σ_{2} | = σ_{u l t} \end{matrix}

Pasted image 20240222133042.png|500