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CUBIT Toolkit

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Announcing

Cubit 15.3 Logo

Release Date August 23, 2017

The CUBIT Team is pleased to announce Version 15.3 of the CUBIT Geometry and Mesh Generation Toolkit.

What's New...

The following is a sampling of some of the main new capabilities introduced with CUBIT 15.3. See the CUBIT 15.3 Release Notes for more details.

Sculpt Enhancements: Sculpt includes a variety of new tools and capabilities for supporting meshing of microstructure RVE (Representative Volume Element) models for computational materials modeling. These include capabilities for improving mesh quality from noisy input data as well as a new option to export a mesh-based geometry model for use with Cubit’s meshgems tetrahedral mesher. Sculpt 15.3 also includes new options for defining boundary conditions, specifying transformations as well as a new option for inserting high aspect ratio boundary layer hexes at material interfaces. It also includes completely updated and revised documentation which now matches the "sculpt –h” option available from the OS command line.

Mesh Scaling - Memory Requirements Reduced: The storage of data during the scale mesh command has been refactored allowing significantly larger meshes to be produced by mesh scaling. Scaled meshes will require roughly half the memory required in earlier versions of Cubit.

Mesh Scaling - New Maintain_structure Method: A new algorithm (maintain_structure)for scaling degrees of freedom in all-hexahedral meshes has been added to the scale mesh command, and the previously released . Specifying maintain_structure will result in a mesh that honors all unstructured node connectivity in the initial mesh, with a smoother scaled mesh than the previously released scaling methods.

New copy mesh capability: The copy mesh capability has been enhanced to better handle surfaces with multiple holes.

Revolve mesh with higher order elements: The revolve mesh capability has been enhanced to support the creation of higher order elements.

Higher order element quality: The Jacobian quality metric has been enhanced to support TETRA15, WEDGE21 and HEX27.

Spider blocks creation enhancements: The command for the creation of spider beam elements has been simplified. The joint node/vertex is now optional. If not specified, CUBIT will automatically create a joint node at the centroid of the specified spider nodes.

Lite Mesh Import/Export: A new "Lite" option has been added to the commands for importing exodus files. The command import mesh <exodus filename> lite will import the mesh orders of magnitude faster than all other exodus file import options, storing the mesh in a lite-weight datastructure designed for a subset of all CUBIT commands, including mesh-based model assembly and verification. Advanced mesh modification options are still available, but only if the previously released import mesh geometry <filename> or import mesh <filename> no_geom commands are used.

New Id/Collision Options for Mesh Import: The options for handling collisions between IDs and names of blocks, sidesets, nodesets, elements, and nodes between multiple mesh file imports have been refactored and made consistent between all mesh import options. Options for combining, auto-offsetting, and failure upon collision are now available.

High-order tet and wedge support: Cubit now supports TETRA15, WEDGE20 and WEDGE21 element types in the cub and ExodusII file formats.

Nastran Export Ids: When exporting mesh to a Nastran file, the global element IDs are now written to the file. This makes the Nastran export consistent with other file formats.

Export M2G Support OpenNurbs & MBG Files: The command export m2g has been enhanced to export either ACIS (*.sat) or OpenNurbs (*.3dm) geometry files.

Command Line Help Wildcards: The command help <string> has been enhanced to support wildcards making it easier to find the keywords you are looking for. For example, typing "help degen*" will now print all commands that have any keyword containing the string "degen".

Higher Resolution Graphics for Quality Commands: More colors have been added to element quality plots. Previously, elements were assigned to one of seven colors based on their quality. In Cubit 15.3, each element is assigned a color based on where its element quality lands on a continuous color spectrum.

Circle Selection: A new circle selection option has been added to the Cubit user interface to complement the existing box and polygon selection tools.

How to Get it...

CUBIT is available to anyone on the Sandia LANs. CUBIT 15.3 will now run automatically from the Linux command prompt, replacing CUBIT 15.2. It is also licensed free of charge for government use outside of Sandia. If you are a current CUBIT licensed user, you may download CUBIT 15.3 from the CUBIT Download Webpage. See CUBIT Licensing for information on obtaining a license.

How You Can Learn More...

The CUBIT 15.3 Release Notes provide a description of all the new features included in CUBIT 15.3. For detailed information follow the links to the online users manual.

Classroom tutorials are advertised on the CUBIT Tutorial Webpage, where you can also find a download for self-guided tutorials.

For more information contact Matt Staten at mlstate@sandia.gov.



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