*extend_elements

Extends, connects and optionally remeshes source 2D elements to target 2D elements.

Syntax

*extend_elements mark_id_source entity_type_target mark_id_target ?options?

Type

HyperMesh Tcl Modify Command

Description

Extends, connects and optionally remeshes 2D elements onto target 2D elements.

Additionally, this detects whether the elements to be extended intersect the target elements. If they do intersect, small penetrations are also removed during the extension and connection. Such small penetrations are defined as ≥ half of the average element size.

Inputs

mark_id_source
The mark ID containing the source nodes to extend over. Valid values are 1 and 2.
entity_type_target
The entity type to use as the target (destination) for the extension. Valid values are components and elements.
mark_id_target
The mark ID containing the target entities to extend to. Valid values are 1 and 2.
options
Additional strings defining extended parameters/options. Options are defined in "name value(s)" format. Valid options are:
projection value
  • 0 - Extend along tangent direction (default, if not provided).
  • 1 - Project normal to destination.
  • 2 - Use direction specified by projection_vector.
projection_vector x y z
3 doubles defining the vector direction. Must be defined, if projection is 2.
angle value
The angle used to define feature edges on the mesh. If not defined, 25.0 is used.
remesh_extension value
0 - Do not remesh extension.
1 - Remesh extension (default if not provided).
remesh_dest_mode value
  • 0 - Do not remesh destination. Destination mesh is stitched to maintain element connectivity.
  • 1 - Remesh all input destination elements.
  • 2 - Remesh destination elements defined by remesh_dest_layers.
remesh_dest_layers value
Must be defined, if remesh_dest_mode is 2.
  • 0 - Remesh only the destination elements attached to the extended element edges.
  • > 0 - Remesh additional layers in addition to the destination elements attached to the extended element edges.
mesh_dest_type value
Automatically detected from input mesh, if not provided.
  • 0 - tria
  • 1 - quad
  • 2 - mixed
  • 3 - R-tria
  • 4 - quad only
mesh_dest_size value
Automatically detected from input mesh, if not provided.

Example

To extend using nodes 704-734, targeting elements 381-605, using a tangent projection, a feature angle of 30, remeshing the extension, and remeshing the destination using 2 layers:
*createmark nodes 1 704-734
*createmark elements 2 381-605
*extend_elements 1 elements 2 "projection 0 angle 30.000000 remesh_extension 1 remesh_dest_mode 2 remesh_dest_layers 2"

Errors

Incorrect usage results in a Tcl error. To detect errors, you can use the catch command:
if { [ catch {command_name...} ] } {
   # Handle error
}

Version History

11.0.130