/EREF
Block Format Keyword 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 | |||||
Definitions
| 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) |
Comments
- Reference state will be applied to shell and solid elements only.
- Multiple /EREF entries are allowed in Radioss input.
- 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. The node IDs must be unique and are only used to define the reference geometry.
- The list does not need to contain all elements of a part, the initial state coordinates are taken for the missing elements.
- If an element does not belong to the specified part it will be ignored.
- Reference state is available:
- for shells using law /MAT/LAW1 (ELAST), /MAT/LAW19 (FABRI) or /MAT/LAW58 (FABR_A)
- 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 (FOAM_VISC), /MAT/LAW38 (VISC_TAB), /MAT/LAW42 (OGDEN) or /MAT/LAW70 (FOAM_TAB)