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⥠Principal Stress Calculator
Calculate principal stresses, maximum shear stress, and stress orientation for plane stress states
đ Principal Stress Formulas
Ďâ,â = (Ď_x + Ď_y)/2 Âą â((Ď_x - Ď_y)²/4 + Ď_xy²)
Ď_max = â((Ď_x - Ď_y)²/4 + Ď_xy²)
θ_p = ½ arctan(2Ď_xy/(Ď_x - Ď_y))
Ď_avg = (Ď_x + Ď_y)/2
Ďâ,â = principal stresses, Ď_max = maximum shear stress, θ_p = principal angle, Ď_avg = average stress
Maximum Principal Stress Ďâ:
Minimum Principal Stress Ďâ:
Maximum Shear Stress Ď_max:
Principal Angle θ_p:
Average Stress Ď_avg:
Stress State:
đĄ Tips
- Principal stresses are the maximum and minimum normal stresses
- Maximum shear stress occurs at 45° to principal directions
- Ďâ is always greater than or equal to Ďâ
- For plane stress, Ďâ = 0 (out-of-plane stress)
- Principal stresses are perpendicular to each other
- Use Mohr's circle for graphical analysis