Dear Andriy, A priori, I found the reverse in the svn tree. the factor sqrt(3.0/2) has been added by Jean-Yves Heddebaut in r2953 (version 3.1) and is still present. Is this factor correct ? If I follow the definition of the Von Mises stress in http://fr.wikipedia.org/wiki/Critère_de_plasticité and after basic computation I found a factor of 3.0/sqrt(2.0). Am I wrong ?
Yves. Andriy Andreykiv - 3ME <[email protected]> a écrit : > > 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 mailing list [email protected] https://mail.gna.org/listinfo/getfem-users
