Block Format Keyword Describes the surface selected from 3 node shell groups.


Enter selected items numbers (any number may be input, 10 per format).
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
item_ID1 item_ID2 item_ID3 item_ID4 item_ID5 item_ID6 item_ID7 item_ID8 item_ID9 item_ID10


Field Contents SI Unit Example
surf_ID Surface identifier

(Integer, maximum 10 digits)

unit_ID Unit Identifier

(Integer, maximum 10 digits)

surf_title Surface title

(Character, maximum 100 characters)

item_ID1, item_ID2, ... item_IDn List of 3 node shell group identifiers.

If item_ID is negative, the surface normals are inverted.




  1. All nodes must belong to a shell element, a brick element or a triangular shell element.
  2. A surface cannot be defined using Madymo surfaces.
  3. A surface cannot be defined by associating a hyper-ellipsoid and another type of surface.