Stressed

This tool performs several transformations and compares multiple failure theories for a given stress tensor.

Summary

• Calculates the principal stresses and stress invariants
• Calculates Max Shear stress per Tresca failure theory
• Calculates von Mises stress and compares two methods of determining sign for use with Signed von Mises criterion
• Plots Mohr's Circle for 2D or 3D stress states

References

• Principal stresses and invariants: Cauchy Stress Tensor (Wikipedia)
• Max Shear failure theory: Tresca yield surface (Wikipedia)
• vonMises Yield criterion (Wikipedia)
• Signed von Mises (invariant method): Fatigue Toolbox, s3.1
• Signed von Mises (Principal stress method): ref TBD
• Mohr's Circle (Wikipedia)