FEDEASLab

Geometry > kg_TriMemb

kg_TriMemb

Purpose

geometric stiffness matrix for triangular membrane element for different options

Synopsis

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

Description

KG_TRIMEMB geometric stiffness matrix for triangular membrane element for different options
  KG = KG_TRIMEMB (OPTION,XYZ,U,PL);
  the function determines the geometric stiffness matrix KG of a triangular mebrane 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
  • spinblk determine the spin tensors for a group of vectors
This function is called by:
  • InelCST constant strain triangle with inelastic material under plane stress/strain
  • InelLST linear strain triangle with inelastic material under plane stress/strain
  • LECST constant strain triangle with linear elastic material under plane stress/strain
  • LELST linear strain triangle with linear elastic material under plane stress/strain