latt

Mapdl.latt(mat='', real='', type_='', kb='', ke='', secnum='', **kwargs)

Associates element attributes with the selected, unmeshed lines.

APDL Command: LATT

Parameters
  • mat – Material number, real constant set number, and type number to be associated with selected, unmeshed lines.

  • real – Material number, real constant set number, and type number to be associated with selected, unmeshed lines.

  • type_ – Material number, real constant set number, and type number to be associated with selected, unmeshed lines.

  • kb – Beginning and ending orientation keypoints to be associated with selected, unmeshed lines. ANSYS uses the location of these keypoints to determine how to orient beam cross sections during beam meshing. Beam elements may be created along a line with a constant orientation by specifying only one orientation keypoint (KB), or a pre-twisted beam may be created by selecting different orientation keypoints at each end of the line (KB and KE). (For a line bounded by two keypoints (KP1 and KP2), the orientation vector at the beginning of the line extends from KP1 to KB, and the orientation vector at the end of the line extends from KP2 to KE. The orientation vectors are used to compute the orientation nodes of the elements.)

  • ke – Beginning and ending orientation keypoints to be associated with selected, unmeshed lines. ANSYS uses the location of these keypoints to determine how to orient beam cross sections during beam meshing. Beam elements may be created along a line with a constant orientation by specifying only one orientation keypoint (KB), or a pre-twisted beam may be created by selecting different orientation keypoints at each end of the line (KB and KE). (For a line bounded by two keypoints (KP1 and KP2), the orientation vector at the beginning of the line extends from KP1 to KB, and the orientation vector at the end of the line extends from KP2 to KE. The orientation vectors are used to compute the orientation nodes of the elements.)

  • secnum – Section identifier to be associated with selected, unmeshed lines. For details, see the description of the SECTYPE and SECNUM commands.

Notes

The element attributes specified by the LATT command will be used when the lines are meshed.

Lines subsequently generated from the lines will also have the attributes specified by MAT, REAL, TYPE, and SECNUM. If a line does not have these attributes associated with it (by this command) at the time it is meshed, the attributes are obtained from the then current MAT, REAL, TYPE, and SECNUM command settings.

In contrast, the values specified by KB and KE apply only to the selected lines; that is, lines subsequently generated from these lines will not share these attributes. Similarly, if a line does not have KB and KE attributes associated with it via the LATT command at the time it is meshed, ANSYS cannot obtain the attributes from elsewhere. See the discussion on beam meshing in Meshing Your Solid Model in the Modeling and Meshing Guide for more information.

Reissue the LATT command (before lines are meshed) to change the attributes. A zero (or blank) argument removes the corresponding association. If any of the arguments are defined as -1, then that value will be left unchanged in the selected set.

In some cases, ANSYS can proceed with a line meshing operation even when no logical element type has been assigned via LATT,,,TYPE or TYPE. See Meshing Your Solid Model in the Modeling and Meshing Guide for more information about setting element attributes.