Dear all, I’m trying to implement a DG formulation for solid mechanics using linear elements.
I’m currently using the following strategy: I define my variables as MONOMIALS but in the assembly I pretend my FEType is LAGRANGE. This gives me the correct values of the shape functions on the edges. I was also able to use the L2_LAGRANGE family to achieve the same results. Do you have any suggestions on which family I should use? Additionally I noticed something wrong in the assembly. When I use LAGRANGE fefamily my global rhs vector (for a 2D elasticity problem) looks like this u_x_point0 u_y_point0 u_x_point1 u_y_point1 . . . u_x_pointN u_y_pointN and the local vector is organized in the following manner u_x_point0 u_x_point1 u_x_point2 u_y_point0 u_y_point1 u_y_point2 Does this still happen with other fefamilies? My routine for assembly of traction boundary conditions works with LAGRANGE fefamily. For a 2D square with 2 elements and a shear traction condition my rhs is RHS! Size global = 8 local = 8 # Value 0 0 1 0 2 0 3 3.125 4 0 5 3.125 6 0 7 0 When using MONOMIALS or L2_LAGRANGE , I think the contributions are in the wrong places RHS! Size global = 12 local = 12 # Value 0 0 1 0 2 0 3 0 4 3.125 5 3.125 6 0 7 0 8 0 9 0 10 0 11 0 Does anyone have any suggestion? Thank you very much for your help, All the best, Simone ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
