Hi all,
I am doing some nonlinear analysis using consistent tangent matrix. I did uniform traction tests found that the results are not homogeneous even though the finite element solution (global solution) converges very well. However, if I do not use the linear stiffness matrix instead of...
I'm developing finite element program myself for the research. We used the skyline storage for the system matrix. Now the new stiffness matrix is unsymmetric and all the solver I can find is for symmetric matrix. Could anyone tell me where I can find the program with skyline storage scheme to...
I am developing a nonlinear finite element program for the response of ferroelectric materials. Due to the electro-mechanical coupling, the nonlinearity is material nonlinear. I derived the consistent tangent stiffness matrix and are trying to test it. Three tests were carried out on a...
