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Hi I want to compute transformation matrix for a flat shell element which has 6-dof per node to convert stiffness matrix from local to global coordinate. does anyone know about this?

hi Pinched cylinder problem is a benchmark problem (as shown in attached file), I want to solve it by MITC4+ element which is 4node element and has 5-Dofs per node to calculate the total stiffness matrix, should i compute the stiffness matrix of each element in local coordinate next transform...