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Errors, Glue, Analysis

[ Edited ]

I am getting these errors during the analysis. I think this is probably due to the glue contact I am trying to do. I am not sure whether what I am doing is correct or not. Kindly help.

3 REPLIES

Re: Errors, Glue, Analysis

Hello!,

The error is clear: you have defined a region based in surfaces without mesh, not mesh exist, then the error. FEMAP try to write the nastran input deck with the surface-to-surface GLUE contact definition on regions, but  the mesh is missing.

In the MODEL INFO clik in CONNECTIONS > REGIONS and issue command SHOW EXPANDED, this way you can check the validity of your connection regions.

Best regards,
Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director
IBERISA • 48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog Femap-NX Nastran: http://iberisa.wordpress.com/

Re: Errors, Glue, Analysis

How do I solve the problem? Do I have to solve it from the start or I can make some adjustments?

I am confused about joining parts, the main case is  mid-surfaced and rest are solids.

Should I mesh them separately or as a unified part? 

 

And should gluing be done after meshing?

Re: Errors, Glue, Analysis

Hello!,

You can define GLUE SURFACE-TO-SURFACE at any time (before solving, of course!), you need to make sure the surfaces used to define the GLUE regions are properly meshed using either Shell or Solid mesh, if not FEMAP will fail to send NX NASTRAN solver the collection of nodes & element faces that form the glue surfaces.

A surface glue region is a collection of element free faces in a section of the model where you expect glue to occur. These regions can be created using the shell elements (BSURF and BCPROP) and using solid element free faces (BSURFS and BCPROPS).
• The BSURF entry is a list or range of shell element IDs to include in the region.
• The BCPROP entry is a list of shell element property IDs. Shell elements which use any of these listed property IDs will be included in the region.
• The BSURFS entry is a list of solid element IDs each followed by 3 grid points defining which face of the 3-D element to include in the glue region.
• The BCPROPS entry is a list of solid element property IDs. The free faces of the solid elements selected with a property ID are automatically determined by the software.
An element should not appear more than once in the regions that are part of a glue/contact pair.

Best regards,
Blas.

Blas Molero Hidalgo, Ingeniero Industrial, Director
IBERISA • 48004 BILBAO (SPAIN)
WEB: http://www.iberisa.com
Blog Femap-NX Nastran: http://iberisa.wordpress.com/