Users:General FEM Analysis/Elements Reference/NURBS BRep Edge cord

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Contents

General Description

Coded and testing is in progress.

Element Type

  • This element provides a geometrically nonlinear, isogeometric spatial cable.

Degrees of Freedom

The element uses the translatoric degrees of freedom (Disp_X, Disp_Y, Disp_Z) of the control points of the master element.

Parameter Description

Compulsory Parameters
Parameter Values, Default(*) Description
MAT EL-MAT int Linking to a material input block
INT_TYPE_NURBS_BREP_CHORD FULL, USER Control of integration type.
  • FULL: p+1 Gauss points are used (p = polynomial degree of the NURBS patch)
  • USER: the optional Parameter GAUSS_U defines the number of Gauss points
CROSS SECTION AREA = float area of the cross section
PRESTRESS PRESTRESS = float prestress of the cable element
Optional Parameters
Parameter Values, Default(*) Description
GAUSS_U GAUSS_U = int Number of Gauss point per element. Must only to be defined when INT_TYPE_NURBS_BREP_CHORD = USER

Example of a Complete Input Block

EL-PROP 1 : NURBS_BREP_CHORD  
  MAT= EL-MAT 1
  AREA = 1
  PRESTRESS = 4000
  INT_TYPE_NURBS_BREP_CHORD = USER or FULL
  GAUSS_U = 4

Element Loading

As the NURBS_BRep_Edge_Cord element is embedded into a master element, it can carry all loads which can be assigned to the master element:

Benchmarks

The main benchmark file in the Carat++-repository is

  • '../examples/benchmark_examples/isogeometric/iga_formfinding_4point_with_trusses/cbm_4PointSailwTrusses.txt'.

References





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