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/EREF

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/EREF
/EREF

Block Format Keyword

/EREF - Reference State Input with Elements

Description

Describes the reference state for elements belonging to a part using given element and node identifier.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/EREF/SHELL/part_ID
eref_title
shell_ID	node_ID1	node_ID2	node_ID3	node_ID4

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/EREF/SH3N/part_ID
eref_title
triang_ID	node_ID1	node_ID2	node_ID3

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/EREF/BRICK/part_ID
eref_title
brick_ID	node_ID1	node_ID2	node_ID3	node_ID4	node_ID5	node_ID6	node_ID7	node_ID8

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/EREF/TETRA4/part_ID
eref_title
tetra4_ID	node_ID1	node_ID2	node_ID3	node_ID4

Field	Contents	SI Unit Example
part_ID	Optional part identifier (Integer, maximum 10 digits)
eref_title	Title (Character, maximum 100 characters)
shell_ID	4-nodes Shell identifier (Integer)
triang_ID	3-nodes Shell identifier (Integer)
brick_ID	8-nodes Brick or 4-node tetrahedron element identifier (Integer)
tetra4_ID	4-nodes tetrahedron element identifier (Integer)
nodei	Node identifier i (Integer)

1.	Reference state will be applied to shell and solid elements only.

2.	Multiple /EREF entries are allowed in RADIOSS input.

3.	The element_ID is the same as in the initial state and node_ID coordinates defining the element in the reference state must be given in /NODE.

4.	The list does not need to contain all elements of a part, the initial state coordinates are taken for the missing elements.

5.	If an element does not belong to the specified part it will be ignored.

6.	Reference state is available:

•	for shells using law /MAT/LAW1, /MAT/LAW19 or /MAT/LAW58

•	for 4-node tetrahedron elements and 8-node bricks using Isolid =1, 2 or 24 and Iframe =2 (co-rotational formulation) and material laws /MAT/LAW35, /MAT/LAW38, /MAT/LAW42 or /MAT/LAW70