Boundary Data

Prescribed values for boundary data can be entered by using the following FEMGEN command:

PROPERTY BOUNDARY PRESCRIBE [name] part_name/ALL idof arg [loadcase_no]

Argument Meaning

name Optional name identifier (for reference purposes).

part_name/ALL Any geometry containing nodes.

idof Degree of freedom to which the prescribed value applies.

arg Prescribed value.

loadcase_no Optional FEMGEN loadcase No. (ABAQUS step), default is all loadcases.

The command has the same effect as the 'PROPERTY LOAD DISPLACE' command but is much more general in that any degree of freedom may be referenced. The degree of freedom names are listed in table below. Further information on how to modify these defaults may be found in the FEMGV Users Manual.

The Interface Program produces a node set for each prescribed boundary definition and then defines and attaches the prescribed boundary to the node set using a '*BOUNDARY' card.

Example FEMGEN Command:

PROPERTY BOUNDARY PRESCRIBE CO1 S8 2 30

Corresponding ABAQUS Input Deck:

**
**********************
** PRESCRIBED VALUES *
**********************
**
*NSET, NSET=CO1     
   22   43   44   45    1   23   46   47   48    2   24   49   50   51    3   52
   53   54   55   31   56   57   58   10   59   60   61   62   32   63   64   65
   11   66   67   68   69
*BOUNDARY
CO1     ,   2,   2,  30.0000

Degree of freedom name Meaning

1 or X x-translation

2 or Y y-translation

3 or Z z-translation

4 or RX x-rotation

5 or RY y-rotation

6 or RZ z-rotation

7 or W beam warping

8 or P pore pressure

10 or E electrical potential

11 or T temperature