formGeometricStiffnessMindlinQ45dof.m bucklingMindlinPlate3Dof.m drawEigenmodes1D.p drawEigenmodes2D.p drawingEigenmodes.p drawingField.p drawingMesh.p EssentialBC.m EssentialBC5dof.m forcesInElementGrid.m formForceVectorMindlinQ4.m formForceVectorMindlinQ45dof.m formGeometricStiffnessMindlinQ4.m