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CAD Import Module
and LiveLink™ for CAD V4.3a
LiveLink™ for AutoCAD®, LiveLink™ for Creo™ Parametric,
LiveLink™ for Inventor®, LiveLink™ for Pro/ENGINEER®,
LiveLink™ for Solid Edge®, LiveLink™ for SolidWorks®,
LiveLink™ for SpaceClaim®
Contents
• Feature Guide
• LiveLink Interface
• One Window Interface
• File Import
• CAD Import Module Kernel
• Defeaturing and Repair
• Virtual Geometry and Mesh Control
Operations
*LiveLink for AutoCAD, LiveLink for Creo Parametric, LiveLink for Inventor, LiveLink for Pro/ENGINEER, LiveLink for Solid Edge,
LiveLink for SolidWorks, and LiveLink for SpaceClaim **LiveLink for SolidWorks
COMSOL Multiphysics
CAD Import Module
LiveLink for CAD*
LiveLink interface X
One Window interface X**
CAD File Import X X
CAD dedicated geometry kernel
X X
Defeaturing and Repair X X
Export to Parasolid X X
Virtual geometry and mesh control operations
X
Feature Guide
LiveLink Interface
Benefits
• Set up your COMSOL model only once for multiple CAD design configurations
• Optimize the CAD design by automatically sweeping over, and solving the model,
for a range of design variations
• No need to keep track of several CAD files with variations of the same design
• Transferred geometry can be defeatured and modified in COMSOL
• Leverage COMSOL’s capability of server and cluster computing
• Integrate with LiveLink for MATLAB® for even greater flexibility
CAD Software and Version
LiveLink for AutoCAD AutoCAD 2012, 2013
LiveLink for Creo Parametric Creo Parametric 1.0, 2.0
LiveLink for Inventor Inventor 2012, 2013
LiveLink for Pro/ENGINEER Pro/ENGINEER Wildfire 4.0, 5.0 Creo Elements/Pro 5.0
LiveLink for Solid Edge Solid Edge ST5
LiveLink for SolidWorks SolidWorks 2011, 2012
LiveLink for SpaceClaim SpaceClaim 2011+, 2012
LiveLink for CAD: Supported Software
New
CAD program
active CAD file
COMSOL Multiphysics
Updated geometry
Parameters
A bidirectional Interface
• Transfer parameters to CAD program
• Transfer geometry to COMSOL
CAD program
active CAD file
COMSOL Multiphysics
Updated geometry
Parameters
Automatic Parametric Sweep
• Physics settings retained in COMSOL
model
• Automatic mesh
• Automatic solve
• Automatic result plots
Top CAD assembly file
Part 1
Part 2
Part 1
Sub-assembly 1
Part 2
Geometry Parameters
COMSOL Multiphysics
* Available with LiveLink for Creo Parametric, LiveLink for Inventor,
LiveLink for Pro/ENGINEER, LiveLink for SolidWorks
Parameter Update
• Update, in both CAD assemblies and
CAD parts, parameters that are
- User defined, or
- Model generated
• Interactively link parameters in the CAD
program to COMSOL*
• Available with LiveLink for SolidWorks
• Create multiphysics models inside the SolidWorks user interface
One Window Interface
* Needs license for File Import for CATIA V5
Format Extension Version
Parasolid® .x_t, .x_b up to V25
SAT® (ACIS®) .sat, .sab up to R22
STEP .step, .stp AP203, AP214
IGES .igs, .iges up to 5.3
Autodesk Inventor part .ipt 6 – 11, 2008 – 2012
Autodesk Inventor
assembly
.iam 11, 2008 – 2012
Pro/ENGINEER .prt, .asm 16 to Wildfire 5.0
Creo Parametric .prt, .asm 1.0
SolidWorks .sldprt, .sldasm 98-2012
CATIA V5* .CATPart, .CATProduct R6 to R22
File Import: Supported Formats
• Import solids, surfaces, curves, and
points
- Form solids from
surfaces
• Length unit from CAD file or from
COMSOL geometry
• Automatic repair during import
- Healing gaps, removing
spikes, short edges,
slivers, etc.
• Location and type of errors in geometry
reported after import
File Import
• Integration of the Parasolid kernel,
which is one of the leading 3D
modeling kernels
• Used by default with a license for the
CAD Import Module or a LiveLink for
CAD Product
• Enables defeaturing and repair of
imported CAD geometry
• Enables combining imported
geometry with geometry generated in
COMSOL
Dedicated Geometry Kernel
• Click on a node in the Model Builder to
access and modify the settings for the
geometry operations
• Enable or disable geometry operations in the
sequence
• Delete operations or insert new ones
• Fully parameterized geometries
Geometry Sequence
Defeaturing and Repair
Heal gap and
create solid
CAD Repair
• Perform after import of CAD files - Repair – similar to the automatic repair during import
- Knit to solid – heals gaps to create closed surfaces or solids
Delete
Fillets
Defeaturing tools
• Interactively search for and remove
- Fillets
- Small faces
- Sliver faces
- Spikes
- Short edges
Remove face and
extend other faces
to fill gap
Delete Sliver Faces
Faces are deleted and the wound is
healed by growing surrounding faces
Delete Faces
• Select faces to be deleted
• Use to remove holes
• Use to remove larger features from the geometry
Faces are detached into separate
objects. New faces are created by
growing surrounding faces.
Detach Faces
• Select faces to be detached into a new solid object
• Use to create a solid for fluid calculation in a channel or hole
• Use to create a domain to apply different materials
Cap Faces
• Select edges to form new faces on solid or surface objects
• Use to create a domain for fluid calculation in a channel or hole
• Use to create a domain to apply different materials
• Use to close a surface object and create a solid
Virtual Geometry and
Mesh Control Operations
Virtual Geometry Operations
• Complements defeaturing and repair operations
• “Hides” geometry features from the mesher
• Use to get rid of – Sliver faces
– Short edges
– Small faces
– Undesired surface partitioning
– Small domains due to overlapping solids
• Difference from defeaturing – Works on the finalized geometry that is seen by the mesher
– Keeps the underlying surface curvature
• Gain precise control over mesh layout and density in regions of known rapid changes
or steep gradients, which may occur for example in CFD simulations
• Selected geometry features are available exclusively to control local mesh properties
and do not affect the subdivision of edges, faces, or domains when applying physics
settings
Domain for mesh control in benchmark model of turbulent flow field around a car-like object
Mesh Control Operations
Recommended