kg_QuadPlate

Purpose

geometric stiffness matrix for quadrilateral plate element for different options

Synopsis

kg = kg_QuadPlate (option,xyz,u,pl)

Description

KG_QUADPLATE geometric stiffness matrix for quadrilateral plate element for different options
  KG = KG_QUADPLATE (OPTION,XYZ,U,PL);
  the function determines the geometric stiffness matrix KG of a quad plate element
  with end coordinates in array XYZ (columns correspond to nodes);
  the geometric stiffness matrix depends on the node displacement values in array U (ndm x nen)
  in the global reference system and on the local nodal force vector PL; (nen = number of nodes)
  OPTION is a character variable with value equal to
  'linear' or 'corotational' for linear and corotational geometry, resp.

Cross-Reference Information

This function calls:

• DefGeom_Quad determines local coordinates and corotational triad of quadrilateral element
• Large3du2ul_Quad determine the local displacements of a triangular element
• Rot2q convert normalized rotation vector to quaternion representation
• q2Rmat determine rotation matrix from normalized quaternions
• spin determine the spin tensor of a vector
• spinblk determine the spin tensors for a group of vectors

• Inel4nodeMindlinReShellwITC isoparametric inelastic 4 node quad Mindlin RC layer shell element with ITC
• Inel4nodeMindlinShellwITC isoparametric inelastic 4 node quad Mindlin layer shell element with ITC
• Inel4to9nodeMindlinReShell inelastic isoparametric 4-9 node quad Mindlin element with reinforcing layers
• Inel4to9nodeMindlinShell isoparametric 4-9 node quad layer shell element with inelastic material
• LE4nodeMindlinPlate linear elastic isoparametric 4-node quadrilateral Mindlin plate element
• LE4nodeMindlinPlatewITC linear elastic isoparametric 4-node quadrilateral Mindlin plate element with ITC
• LE4nodeMindlinShellwITC linear elastic isoparametric 4-node quadrilateral Mindlin shell element with ITC
• LE4to9nodeMindlinPlate linear elastic isoparametric 4-9 node quadrilateral Mindlin plate element
• LE4to9nodeMindlinShell linear elastic isoparametric 4-9 node quadrilateral Mindlin shell element