Isoparametric Reissner-Mindlin Plate FEM

This model is descriptioned Isoparametric Rectangular Reissner-Mindlin Plate element models. Element is theorical application than smilarly mindlin isopaparametric curved shell finite element model. If curved shell element "Mz-z(Qz)" axis twisting effect and plane stress membrane effect
"fx(u)" ,"fy(u)"neglected than curved shell is tranformed reissner-minlin plate.Notice this theorecaly application is neglected,element total potential enegery components , shear deformation enegry + membrane strain enegry. Nevertless simple node element model has seen twisting moment error is big but interesting max. deplacement error is small.

Isoparametric element model analysis is collocated parametric element model for equivalent geometricaly boundary conditions. Also per analysis results
is collocated ,mechnanical model (Castigliano cantilever beam theory), sap2000 (strutral analysis program).