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2 Replies
Last post: January 14, 2013 7:42am UTC
January 12, 2013 12:55am UTC
Cauchy Stress
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.
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January 12, 2013 8:28pm UTC in response to Jorge Bazan
Re: Cauchy Stress
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
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January 14, 2013 7:42am UTC in response to Jorge Bazan
Re: Cauchy Stress
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
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