To create or edit a symmetry/antisymmetry/encastre boundary condition:

Display the symmetry/antisymmetry/encastre boundary condition editor using one of the following methods:

To create a new symmetry/antisymmetry/encastre boundary condition, follow the procedure outlined in “Creating boundary conditions,” Section 16.8.2 (Category: Mechanical; Types for Selected Step: Symmetry/Antisymmetry/Encastre).

To edit an existing symmetry/antisymmetry/encastre boundary condition using menus or managers, see “Editing step-dependent objects,” Section 3.4.12. You can edit the symmetry/antisymmetry/encastre boundary condition only in the step in which it was created.

If you are creating the boundary condition in a buckling step, select the Use BC for option that specifies the calculations for which you want the boundary condition used. For more information, see “Boundary conditions,” in “Eigenvalue buckling prediction,” Section 6.2.3 of the ABAQUS Analysis User's Manual.

Select one of the following options:

XSYMM: Symmetry about a plane X = constant (U1 = UR2 = UR3 = 0).

YSYMM: Symmetry about a plane Y = constant (U2 = UR1 = UR3 = 0).

ZSYMM: Symmetry about a plane Z = constant (U3 = UR1 = UR2 = 0).

XASYMM: Antisymmetry about a plane with X = constant (U2 = U3 = UR1 = 0;ABAQUS/Standard only).

YASYMM: Antisymmetry about a plane with Y = constant (U1 = U3 = UR2 = 0;ABAQUS/Standard only).

ZASYMM: Antisymmetry about a plane with Z = constant (U1 = U2 = UR3 = 0;ABAQUS/Standard only).

PINNED: Pinned (U1 = U2 = U3 = 0).

ENCASTRE: Fully built-in (U1 = U2 = U3 = UR1 = UR2 = UR3 = 0).

Click OK to save your data and to exit the editor.