iMechanica - Numerical phase modeling of BTO nanostructure using Landis&#039; model with FEAP - Comments http://www.imechanica.org/node/5991 Comments for "Numerical phase modeling of BTO nanostructure using Landis' model with FEAP " en Numerical phase modeling of BTO nanostructure using Landis' model with FEAP http://www.imechanica.org/node/5991 <p>&nbsp; The difference to the common model used is the f,g terms. The 3D FEM formulation has been derived and a new fortran program is written. The derivative matrix is symmetric. But the calculation result does not converge. I have tried every means to get a converging result. But it doesn&#39;t work, the residual norm always increases.</p> <br class="clear" /> http://www.imechanica.org/node/5991#comments research convergence FEAP ferroelectrics Fortran Landau equation Landis Wed, 08 Jul 2009 05:01:07 -0400 Yinan Zuo 5991 at http://www.imechanica.org