Total Lagrangian Finite Deformation (TLFD) Twenty-Node Brick Element Commands

element TLFD20nBrick eleTag? nd01? nd02? ... nd20? bf1? bf2? bf3?

The TLFD20nBrick element is the the three dimensional element implemented based on the tensor operation. The argument to construct the element are its tag, TLFD20nBrick, element tag, eleTag, ordered twenty nodes, nd01 to nd20, and the body forces, bf1, bf2, bf3. By default, \(3 \times 3 \times 3\) integration points are used. The valid material tags for this element are hyperelastic material (see Tcl Commands for Hyperelastic Material Models) and hyperelasto-plastic material (see Tcl Commands for Hyperelasto-Plastic Material Models).