Combining Abaqus surfaces on import

This software supports the COMBINE parameter for the Abaqus *SURFACE keyword. In Abaqus, you use the *SURFACE keyword to define a surface or a region to facilitate defining boundary conditions, such as contact conditions and tied surface constraints.

In Abaqus, you can use the COMBINE parameter to create combined surfaces by performing a Boolean operation on existing surfaces. When you use the COMBINE parameter:

• The surfaces that you combine must be of the same type. For example:You can combine an element-based surface with another element based-surface.You cannot combine an element-based surface with a node-based surface.

• You can combine any number of existing surfaces to create a new surface.

• Abaqus automatically merges any overlap between the combined surfaces.

When you import an Abaqus input file that includes the COMBINE parameter, the software processes the union, intersection, or difference between the specified surfaces. It imports the resulting combined surface as a Simulation Region.

Note:

If you later export this file back to Abaqus, the exported Abaqus input file differs from the original Abaqus input file. The difference occurs because the software does not write the COMBINE parameter to the input file when it exports the Simulation Region that was created from the combined region. Instead it adds COMBINE to the surface name.

Where do I find it?

Application	Pre/Post
Prerequisites	A Simulation file as the work part and displayed partAbaqus as the specified solver
Menu	File→Import→Simulation

Learn more

Controlling the import of elements and nodes

Importing Abaqus assembly models

Import support for Abaqus load cases

Importing Abaqus equations

Importing the Abaqus *NMAP keyword

Controlling the import of element attributes

Controlling the import and export of SPRING2 elements

Compressing node sets when exported

Exporting material definitions

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Abaqus keywords supported for import and export

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Combining Abaqus surfaces on import, Simcenter 3D 2021.1 Series

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