hookeai.miscellaneous.materials.plot_yield_surface.pi_to_principal

pi_to_principal(pi1, pi2, pi3)[source]

Convert pi-stress to principal stress.

Parameters:

  • pi1 (float) – First pi-stress.

  • pi2 (float) – Second pi-stress.

  • pi3 (float) – Third pi-stress.

Returns:

  • s1 (float) – First principal stress.

  • s2 (float) – Second principal stress.

  • s3 (float) – Third principal stress.