HyperWorks Release Notes

ANSYS Interface 14.0.130 Release Notes

ANSYS Interface 14.0.130 Release Notes

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ANSYS Interface 14.0.130 Release Notes

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Highlights

In this release, ANSYS interface sees two significant enhancements in model set up process.

•Defining and importing contact surfaces for ANSYS models is completely changed.
•Part replacement is now available in ANSYS interface.

 

hmtoggle_arrow1Contact Surface Setup in ANSYS Interface

In ANSYS, solver contact surfaces are identified as elements overlaid on the faces of solid or shell elements that represent the geometry of the FE model. Prior to this release, HyperMesh followed the same principle as the solver to provide interface with ANSYS.  Hence both CONTACT (defined as master in HyperMesh) and TARGET (defined as slave in HyperMesh) regions were elements over FE model that represent the geometry of the model.

This has been changed. Now these contact regions are no longer a set of elements in HyperMesh. Both contact and target regions are identified as CONTACT SURFACES. A pair of contact and target surfaces that interact with each other in analysis are defined by CONTACT PAIR in HyperMesh. Users needs to create contact surfaces for both CONTACT and TARGET regions. Then they are paired together under “Contact Pair” to successfully define the contacts. In the contact pair, users will define the element type for the master and slave. During export to the ANSYS solver file (*.CDB file), these surfaces will be converted to contact elements of type defined in contact pair. ANSYS solver files with contacts are imported in HyperMesh, which then identifies the contact regions from the contact elements and shows those regions as contact surfaces. Each contact pair is listed in the table area of the Contact browser.

The image below highlights the differences in support of contact surfaces from previous to current releases:

ansys_14_130_01

With this new contact support in HyperMesh, users can create surface to surface, edge to edge, point to surface and rigid (pilot node) contacts. To create point to surface contacts “contact masses” need to be defined for contact surfaces. Contact masses are node sets. To define rigid contacts with pilot node option users need to create a node set with single node in it. Options to create all these surfaces and node sets are available in the Contact browser.

The Contact browser can list, create and manage contact surfaces and pairs in HyperMesh. All components in the model, contact surfaces, contact properties, contact mass and pilot nodes are listed in the browser. The table lists and creates the contact pairs, or guides user to use the Auto Contact tool. The Entity Editor shows the details of the entity picked in browser or table. The Contact browser, table and Entity Editor has many options that can be accessed from the context sensitive menus. More information is available on online help about these options.

Options to create symmetry contacts is available via the context sensitive menu on eligible contact pairs. Using this option creates a replica of the selected contact pair but the master (contact) surface and slave (target) surfaces are swapped.

Using this new contact support, users can review, adjust and reverse the normals of the contacts of both surface to surface (3D) and edge to edge (2D) contacts.

ansys_14_130_02

Please refer to the online help for more information on how to create contact surfaces and contact pairs.

 
hmtoggle_arrow1Auto Contact

This release introduces the newer version of the Auto Contact tool. This tool creates surface to surface contact regions automatically using user inputs, including proximity distance or shell thickness option and maximum reverse angle. Access the Auto Contact tool by right-clicking in the Table area in the Contact browser. The Auto Contact tool now uses a newer contact detection procedure which is more accurate and faster than the earlier versions.

The following new options are available:

•Vicinity tolerance distance or “Shell thickness option”.
•Consolidation of the contact regions in one component to one contact surface using the Consolidate Contact Pairs option
•Assign element types and properties – you can now choose to create ET types and properties automatically, or you can choose the existing property and ET type to attach to the contact pairs generated. If more than one pair are created by Auto Contact, then for next pair duplicate of ET type and property of first pair generated and attached to the subsequent contact pairs.
•Penetration checks can be run to check for interferences between contact regions, before identifying them

ansys_14_130_03

 

Known Limitations:

•During import, any ANSYS model with contact elements that has contact and/or target elements not attached to their base geometry model elements, HyperMesh does not create contact surfaces from those contact/target elements. In these cases, you need to merge/equivalence the nodes that share contact / base elements and then run utility “Convert Legacy contacts” available in Utility page to create contact surfaces.
•If there are contact/target elements in the model, and there are no base geometry elements, then during import the models' contact surfaces will not be created. However these elements are still imported as “elements”. On export those elements will also be exported and thus there is no data loss.
•If there are loads and boundary conditions (such as point load or pressure load) applied on contact/target element, those loads are not supported and are not imported in HyperMesh.
•During import/export, the contact/target element numbers are not retained.

 
hmtoggle_arrow1Part Replacement Tool

The Part Replacement tool is now available for ANSYS interface. This tool has been customized for use with ANSYS.

•Option of assigning Et type of source component to Et type of target component is available.
•The option “Organize target component include to source component include” is removed as the ANSYS interface does not support the include feature.
•If ANSYS SURF elements types –SURF152 and SURF154 are created on faces of solid elements, and the solid element component is replaced, then SURF152/SURF154 elements are updated to match the source component mesh.

 

 

Post-Processing

hmtoggle_arrow1Display Results at Middle Nodes of Second Order Elements

HyperView now has the option to display results at middle nodes of edges of second order elements.

This option is active for tensor results. An ANSYS results file does not have results at middle nodes of second order elements for tensors, but HyperView calculates it as the average of results at corner nodes. By default this option is on, but it can also be turned off.

ansys_14_130_04