10.7.3 Importing parts from an ACIS-format file

Many computer-aided modeling and drafting applications can read and write ACIS-format files; you can use these files to exchange geometry information between these applications and ABAQUS/CAE. Select FileImportPart from the main menu bar to import a part from an ACIS-format file. You can import multiple parts stored in an ACIS-format file. You can export parts and the assembly from ABAQUS/CAE into an ACIS-format file.

You cannot import parts of mixed modeling space from an ACIS-format file; for example, solids and axisymmetric surfaces. In addition, you cannot import parts of mixed type; for example, deformable bodies and discrete rigid surfaces.

An imported ACIS part forms the base feature of a new part in ABAQUS/CAE; you cannot modify this base feature directly, but you can add additional features to it, such as a solid extrusion or a blind cut.

To import a part from an ACIS-format file:

  1. From the main menu bar, select FileImportPart.

    The Import Part dialog box appears.

  2. From the File Filter menu at the bottom of the Import Part dialog box, select ACIS SAT (*.sat*).

    ABAQUS/CAE lists all the files in the selected directory with a .sat* file extension.

  3. Select the ACIS file containing the part or parts to import, and click OK.

    The Create Part from ACIS File dialog box appears.

  4. Click the Name-Repair tab to set the following:

    Name

    The name of the new part. For more information, see Using basic dialog box components, Section 3.2.1.

    Repair Options

    When you toggle on the Convert to precise representation option, ABAQUS/CAE tries to change neighboring entities so that their geometry matches exactly. Converting to a precise representation usually results in precise geometry; however, this operation can be lengthy and increases the complexity of the imported part, which means that processing of the part is slower. In most cases you should not select this option when importing an ACIS-format file. For more information, see What is a valid and precise part?, Section 10.2.1.

    Topology

    ABAQUS/CAE selects the topology—solid, shell, or wire—based on the entities that it finds in the file. In most cases you should accept the setting selected by ABAQUS/CAE. However, if the topology of the resulting part is not as expected, you can try importing the part again with a different topology selected.

    Part Filter

    An ACIS file can contain more than one part, and ABAQUS/CAE imports all of the parts in the file by default. Alternatively, you can toggle on Import part number and enter the number of a single part to import from the file.

  5. Click the Part Attributes tab to set the following:

    • The modeling space of the part being imported. When you import a part, ABAQUS/CAE scans the file and tries to determine the modeling space.

    • The type of the part being imported. ABAQUS/CAE always assumes that the part type is deformable. Toggle on Discrete rigid to import a discrete rigid part. For more information, see Part types, Section 11.4.2.

    Again, in most cases you should accept the default settings; for more information, see What are the part attributes?, Section 10.3.2.

  6. Click the Scale tab to scale the part during the import process.

    • Choose No scale to maintain the dimensions stored in the file.

    • Choose Use transform from file, including scale to read the scale factor, the rotation matrix, and the translation matrix from the ACIS file.

    • Choose Multiply all lengths by, and enter a scale factor. ABAQUS/CAE applies the scale factor to all of the coordinates in the file. As a consequence, any offset from the origin will be scaled accordingly.

  7. Click OK to import the ACIS part.

    ABAQUS/CAE enters the Part module, the imported part replaces the contents of the current viewport, and the part appears in the model's list of parts below the toolbar.

  8. When you import a single part, ABAQUS/CAE displays a message in the message area indicating if the part contains any validity or precision problems. If you import multiple parts from a single ACIS file, you can use the Part Manager to check if any of the parts are invalid or imprecise. The Query toolset provides a set of geometry diagnostic tools that allow you to locate areas of invalid and imprecise geometry. For more information, see Using the Query toolset in the Part module, Section 11.16.4. Use the Repair toolset to try to repair an imported part. For more information, see Chapter 47, The Repair toolset.”


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