For maximum principal deformation criterion, analysis is performed according to the following formulas:
σe,t = σ1 - ν ⋅ σ2
σe,c = σ2 - ν ⋅ σ1
Where:
σe,t – equivalent stress in tension;
σe,c – equivalent stress in compression;
σ1, σ2 – principal stresses, σ1 ≥ σ2;
ν – Poisson’s ratio.