Block Format Keyword Describes a tetrahedral solid element with 4 nodes.


(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
tetra_ID node_ID1 node_ID2 node_ID3 node_ID4          


Field Contents SI Unit Examples
part_ID Part identifier of the block

(Integer, maximum 10 digits)

tetra_ID Element identifier


node_ID1 Node identifier 1


node_ID2 Node identifier 2


node_ID3 Node identifier 3


node_ID4 Node identifier 4




  1. The identifier must be unique in each element family, but it is advised for each element type to have a unique element identifier in the global model.
  2. The part_ID of the tetrahedral 4-node elements must be different from:
    • the part_ID of the brick element
    • the part_ID of the tetrahedral 10-node element

      Figure 1.
    The 4-node tetrahedral elements are treated internally as solid elements (brick_ID), using solid materials and solid groups (grbric_ID).