ansys.mapdl.core.Mapdl.xfenrich

Mapdl.xfenrich(enrichmentid='', compname='', mat_id='', method='', radius='', snaptoler='', **kwargs)

Defines parameters associated with crack propagation using XFEM

Mechanical APDL Command: XFENRICH

Parameters:

enrichmentidstr

An alphanumeric name assigned to identify the enrichment. The name can contain up to 32 characters and must begin with an alphabetic character. Alphabetic characters, numbers, and underscores are valid.

compnamestr

Name of the element set component for which initial cracks are defined and possibly propagated.

mat_idstr

Material ID number referring to cohesive zone material behavior on the initial crack. If 0 or not specified, the initial crack is assumed to be free of cohesive zone behavior. Used only with the phantom-node XFEM method ( Method ).

methodstr

PHAN – Use phantom-node-based XFEM (default).

SING – Use singularity-based XFEM.

radiusstr

Radius defining the region around the crack tip encompassing the set of elements to be influenced by the crack-tip singularity effects. Default = 0.0. Used only in singularity-based XFEM.

snaptolerstr

Snap tolerance to snap the crack tip to the closest crack face along the extension direction. Default = 1.0E-6. Used only in singularity-based XFEM.

Notes

If MAT_ID is specified, the cohesive zone behavior is described by the bilinear cohesive law.

If issuing multiple xfenrich commands, the element components ( CompName ) should not intersect (that is, the element components should not have any common elements between them).

When multiple xfenrich commands are issued in an analysis, combining the phantom-node-based method ( Method = PHAN) and the singularity-based method ( Method = SING) is not valid. Only one XFEM method per analysis is allowed.

This command is valid in PREP7 ( prep7 ) only.