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[Getfem-users] bug in von mises stress calculation?
From: |
Andriy Andreykiv - 3ME |
Subject: |
[Getfem-users] bug in von mises stress calculation? |
Date: |
Fri, 28 Aug 2009 11:03:03 +0200 |
Dear Yves and Getfem users,
Want to report a bug. I was using von mises calculation in getfem::mdbrick_nonlinear_elasticity<>.
It was giving a wrong value even though all the other results of the calculation were consistent with the benchmark.
So I checked the code and found that in 3.0.1 version of getfem (the version which documentation is on the website)
the final _expression_ for the value is
VM[i] = sqrt(3.0/2)*gmm::mat_euclidean_norm(sigma); (which is correct, I believe)
while in 3.1 version the multiplier sqrt(3.0/2) is absent.
Best regards,
Andriy
- [Getfem-users] bug in von mises stress calculation?,
Andriy Andreykiv - 3ME <=