BSSEG (Boundary Surface Segments)

Description

The BSSEG entry defines a contact surface comprised of quadrilateral or triangular segments (faces) that can come in contact with another contact surface. Each segment (face) is defined by a set of grid points. optional

Format

1	2	3	4	5	6	7	8	9	10
BSSEG	CSID	G1A	G2A	G3A optional	G4A optional	G1B optional	G2B optional	G3B optional	optional
	G4B optional	G1C optional	G2C optional	G3C optional

Example

BSSEG	2	3	5	7	9	11	13	15
		21	27	33	38

Alternate Format and Example

BSSEG

CSID

G1

THRU

G2

BY optional

INC optional

unused

unused

unused

BSSEG

10

23

THRU

55

BY

2

unused

unused

unused

Field	Definition	Type	Default
CSID	Contact surface identification number.	Integer > 0	Required
Gi	Grid point identification numbers. Grid points define quadrilateral or triangular segments (faces) of a surface and must be ordered so that the normal to the segment points outward. See Remark 3.	Integer > 0	Required

Remarks

1. Contact surface identifiers, CSID, must be unique with respect to all other BSSEG entries. They must also be unique with respect to the CSID’s generated with a CONTACTGENERATE command. See the description of the CONTACTGENERATE command.
2. A triangular segment is defined by specifying a zero or blank for the fourth node.
3. The normal to the segment is determined by the ordering of the segment nodes using the right hand rule. Each segment normal of a contact surface must define the outward normal of the face.