Enhanced Strain Quadrilateral

This command is used to construct a four-node quadrilateral element, which uses a bilinear isoparametric formulation with enhanced strain modes. 

element enhancedQuad $eleTag $iNode $jNode $kNode $lNode
        $thick $type $matTag
eleTag

unique element object tag

iNode jNode kNode lNode

four nodes defining element boundaries, input in counter-clockwise order around the element.

thick

element thickness

type

string representing material behavior. Valid options depend on the NDMaterial object and its available material formulations. The type parameter can be either “PlaneStrain” or “PlaneStress.”

matTag

tag of nDMaterial

NOTE:

  1. The valid queries to a Quad element when creating an ElementRecorder object are ‘forces’, ‘stresses,’ and ‘material $matNum matArg1 matArg2 …’ Where $matNum refers to the material object at the integration point corresponding to the node numbers in the isoparametric domain.

Examples

References

Code Developed by: Edward Love, Sandia National Laboratories