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This command is used to construct a ShellNLDKGT element object accounting for the geometric nonlinearity of large deformation using the updated Lagrangian formula, which is developed based on the ShellDKGT element.

element ShellNLDKGT $eleTag $iNode $jNode $kNode $secTag

$eleTag unique element object tag
$iNode $jNode $kNode three nodes defining element boundaries, input in clockwise or counter-clockwise order around the element.
tag associated with previously-defined SectionForceDeformation object
$secTag currently can be a PlateFiberSection, a ElasticMembranePlateSection and a LayeredShell section

Code Developed by : Shuhao Zhang, Tsinghua University, and Prof. Xinzheng Lu, Tsinghua University