Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Cauchy Stress
Posted 11.01.2013, 19:55 GMT-5 Results & Visualization, Studies & Solvers, Structural Mechanics 2 Replies
Please login with a confirmed email address before reporting spam
hi
I´m modeling a plate. In the results branch I configurated a 2D plot to show "the Second Piola-Kirchhoff stress, xx component" using the expresion "plate.Sxx".
I want to know if it's possible to configurate a Cauchy stress component in the 2D plot.
Regards.
I´m modeling a plate. In the results branch I configurated a 2D plot to show "the Second Piola-Kirchhoff stress, xx component" using the expresion "plate.Sxx".
I want to know if it's possible to configurate a Cauchy stress component in the 2D plot.
Regards.
2 Replies Last Post 14.01.2013, 02:42 GMT-5
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
The Cauchy stress is the stress in the Eulerian representation check for the "spatial stress tensor"
The second Piola-Kirchhoff (or material) stress is in the Lagrangian representation, these are dissociated, in particular for "geometric non-linearity enabled"
Check carefully the doc and use the right Frame for your integrations (see the doc ;)
--
Good luck
Ivar
The Cauchy stress is the stress in the Eulerian representation check for the "spatial stress tensor"
The second Piola-Kirchhoff (or material) stress is in the Lagrangian representation, these are dissociated, in particular for "geometric non-linearity enabled"
Check carefully the doc and use the right Frame for your integrations (see the doc ;)
--
Good luck
Ivar
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
As long as the analysis is geometrically linear, 2nd P-K and Cauchy stresses are the same.
If you have a geometrically nonlinear problem, the interpretation of a Cauchy stress would still be problematic, since it has fixed directions in space, and there would thus be stress components not aligned with the deformed plate.
Regards,
Henrik
If you have a geometrically nonlinear problem, the interpretation of a Cauchy stress would still be problematic, since it has fixed directions in space, and there would thus be stress components not aligned with the deformed plate.
Regards,
Henrik