kg_TriPlate

Purpose

geometric stiffness matrix for triangular plate element for different options

Synopsis

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

Description

KG_TRIPLATE geometric stiffness matrix for triangular plate element for different options
  KG = KG_TRIPLATE (OPTION,XYZ,U,PL);
  the function determines the geometric stiffness matrix KG of a triangular 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_Tri determines local coordinates and corotational triad of triangular element
• Large3du2ul_Tri 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

• InelDKT inelastic discrete Kirchhoff triangle for plate bending
• LECMSDKTShell linear elastic 3-node triangle with constant mebrane strain + DK bending
• LECMSDKTShell_wDDOF linear elastic 3-node triangle with constant mebrane strain + DK bending with drill DOF
• LEDKT discrete Kirchhoff 3-node triangle for plate bending with linear elastic material