import typing
from abaqusConstants import *
from .ElemType import ElemType
from .MeshEdge import MeshEdge
from .MeshElement import MeshElement
from .MeshFace import MeshFace
from .MeshNode import MeshNode
from ..Assembly.AssemblyBase import AssemblyBase
from ..Assembly.PartInstance import PartInstance
from ..BasicGeometry.Cell import Cell
from ..BasicGeometry.Edge import Edge
from ..BasicGeometry.Face import Face
from ..BasicGeometry.IgnoredVertex import IgnoredVertex
[docs]class MeshAssembly(AssemblyBase):
"""An Assembly object is a container for instances of parts. The Assembly object has no
constructor command. Abaqus creates the *rootAssembly* member when a Model object is
created.
Notes
-----
This object can be accessed by:
.. code-block:: python
import assembly
mdb.models[name].rootAssembly
"""
[docs] def assignStackDirection(self, cells: tuple[Cell], referenceRegion: Face):
"""This method assigns a stack direction to geometric cells. The stack direction will be
used to orient the elements during mesh generation.
Parameters
----------
cells
A sequence of Cell objects specifying regions where to assign the stack direction.
referenceRegion
A Face object specifying the top side of the stack direction.
"""
pass
[docs] def associateMeshWithGeometry(self, geometricEntity: str, elements: tuple[MeshElement] = (),
elemFaces: tuple[MeshFace] = (), elemEdges: tuple[MeshEdge] = (),
node: MeshNode = MeshNode((0, 0, 0))):
"""This method associates a geometric entity with mesh entities that are either orphan
elements, bounds orphan elements, or were created using the bottom-up meshing technique.
Parameters
----------
geometricEntity
A Cell , a Face, an Edge, or a ConstrainedSketchVertex object specifying geometric entity to be
associated with one or more mesh entities.If the geometric entity is a Cell object then
the argument *elements* must be specified.If the geometric entity is a Face object then
the argument *elemFaces* must be specified.If the geometric entity is an Edge object
then the argument *elemEdges* must be specified.If the geometric entity is a ConstrainedSketchVertex
object then the argument *node* must be specified.
elements
A sequence of MeshElement objects specifying the elements to be associated with the
geometric cell.
elemFaces
A sequence of MeshFace objects specifying the element faces to be associated with the
geometric face.
elemEdges
A sequence of MeshEdge objects specifying the element edges to be associated with the
geometric edge.
node
A MeshNode object specifying the mesh node to be associated with the geometric vertex.
"""
pass
[docs] def createVirtualTopology(self, regions: tuple[Face], mergeShortEdges: Boolean = False,
shortEdgeThreshold: float = None, mergeSmallFaces: Boolean = False,
smallFaceAreaThreshold: float = None, mergeSliverFaces: Boolean = False,
faceAspectRatioThreshold: float = None, mergeSmallAngleFaces: Boolean = False,
smallFaceCornerAngleThreshold: float = None, mergeThinStairFaces: Boolean = False,
thinStairFaceThreshold: float = None, ignoreRedundantEntities: Boolean = False,
cornerAngleTolerance: float = 30, applyBlendControls: Boolean = False,
blendSubtendedAngleTolerance: float = None, blendRadiusTolerance: float = None):
"""This method creates a virtual topology feature by automatically merging faces and edges
based on a set of geometric parameters. The edges and vertices that are being merged
will be ignored during mesh generation.
Parameters
----------
regions
A sequence of Face objects or PartInstance objects specifying the domain to search for
geometric entities that need to be merged. Entities identified as candidates to be
merged may be merged with entities from outside the specified region.
mergeShortEdges
A Boolean specifying whether to merge short edges. The default value is False.
shortEdgeThreshold
A Float specifying a threshold that determines which edges are considered to be short.
These edges are the candidate entities to be merged. This argument is a required
argument if the argument *mergeShortEdges* equals True and it is ignored if the argument
*mergeShortEdges* equals False.
mergeSmallFaces
A Boolean specifying whether to merge faces with small area. The default value is False.
smallFaceAreaThreshold
A Float specifying a threshold that determines which faces are considered to have a
small area. These faces are the candidate entities to be merged. This argument is a
required argument if the argument *mergeSmallFaces* equals True and it is ignored if the
argument *mergeSmallFaces* equals False.
mergeSliverFaces
A Boolean specifying whether to merge faces with high aspect ratio. The default value is
False.
faceAspectRatioThreshold
A Float specifying a threshold that determines which faces are considered to have high
aspect ratio. These faces are candidate entities to be merged. This argument is a
required argument if the argument *mergeSliverFaces* equals True and it is ignored if
the argument *mergeSliverFaces* equals False.
mergeSmallAngleFaces
A Boolean specifying whether to merge faces that have a sharp corner angle. The default
value is False.
smallFaceCornerAngleThreshold
A Float specifying a threshold that determines which face corner angles are considered
to be small. These faces will be candidate entities to be merged. This argument is a
required argument if the argument *mergeSmallAngleFaces* equals True and it is ignored
if the argument *mergeSmallAngleFaces* equals False.
mergeThinStairFaces
A Boolean specifying whether to merge faces that represent a thin stair-like feature.
The default value is False.
thinStairFaceThreshold
A Float specifying a threshold that determines which faces representing small stair-like
features are considered thin. These faces will be candidate entities to be merged. This
argument is required if the argument *mergeThinStairFaces* is True and it is ignored if
*mergeThinStairFaces* is False.
ignoreRedundantEntities
A Boolean specifying whether to abstract away redundant edges and vertices. The default
value is False.
cornerAngleTolerance
A Float specifying the angle deviation from 180 degrees at a vertex or at an edge such
that the two edges radiating from the vertex or the two faces bounded by the edge can be
merged. The default value is 30.0 degrees.
applyBlendControls
A Boolean specifying whether to verify that blend faces can be merged with neighboring
faces. If *applyBlendControls* is True then all faces that have angle larger than
*blendSubtendedAngleTolerance* and a radius smaller than *blendRadiusTolerance* will not
be merged with neighboring faces unless the neighboring faces are also blend faces with
similar geometric characteristics. The default value is False.
blendSubtendedAngleTolerance
A Float specifying the largest subtended angle of blend faces that can be merged with
neighboring faces. This argument is a required argument if the argument
*applyBlendControls* equals True and it is ignored if the argument *applyBlendControls*
equals False.
blendRadiusTolerance
A Float specifying the smallest radius of curvature of blend faces that can be merged
with neighboring faces. This argument is a required argument if the argument
*applyBlendControls* equals True and it is ignored if the argument *applyBlendControls*
equals False.
Returns
-------
feature: Feature
A Feature object
"""
pass
[docs] def deleteBoundaryLayerControls(self, regions: tuple[Cell]):
"""This method deletes the control parameters for boundary layer mesh for all the specified
regions.
Parameters
----------
regions
A sequence of Cell objects specifying the regions for which to set the boundary layer
mesh control parameters.
"""
pass
[docs] def deleteMesh(self, regions: tuple[PartInstance]):
"""This method deletes a subset of the mesh that contains the native elements from the
given part instances or regions.
Parameters
----------
regions
A sequence of PartInstance objects or Region objects specifying the part instances or
regions from where the native mesh is to be deleted.
"""
pass
[docs] def deleteMeshAssociationWithGeometry(self, geometricEntities: tuple[Cell], addBoundingEntities: Boolean = False):
"""This method deletes the association of geometric entities with mesh entities.
Parameters
----------
geometricEntities
A sequence of Cell objects, Face objects, Edge objects, or ConstrainedSketchVertex objects specifying the
geometric entities that will be disassociated from the mesh.
addBoundingEntities
A Boolean specifying whether the mesh will also be disassociated from the geometric
entities that bounds the given *geometricEntities*. For example, if the argument
*geometricEntities* contains a face, this boolean indicates whether the edges and
vertices that bound the face will also be disassociated from the mesh. The default value
is False.
"""
pass
[docs] def deletePreviewMesh(self):
"""This method deletes all boundary meshes in the assembly. See the *boundaryPreview*
argument of generateMesh for information about generating boundary meshes.
"""
pass
[docs] def deleteSeeds(self, regions: tuple[PartInstance]):
"""This method deletes the global edge seeds from the given part instances or deletes the
local edge seeds from the given edges.
Parameters
----------
regions
A sequence of PartInstance objects or Edge objects specifying the part instances or
edges from which the seeds are to be deleted.
"""
pass
[docs] def generateBottomUpExtrudedMesh(self, cell: Cell, numberOfLayers: int, extrudeVector: tuple,
geometrySourceSide: str = '',
elemFacesSourceSide: tuple[MeshFace] = (), elemSourceSide: tuple = (),
depth: float = None, targetSide: str = '', biasRatio: float = 1,
extendElementSets: Boolean = False):
"""This method generates solid elements by extruding a 2D mesh along a vector, either on an
orphan mesh or within a cell region using a bottom-up technique.
Parameters
----------
cell
A Cell object specifying the geometric region where the mesh is to be generated. This
argument is valid only for native part instances.
numberOfLayers
An Int specifying the number of layers to be generated along the extrusion vector.
extrudeVector
A sequence of sequences of Floats specifying the start point and end point of a vector.
Each point is defined by a tuple of three coordinates indicating its position. The
direction of the mesh extrusion operation is from the first point to the second point.
geometrySourceSide
A Region of Face objects specifying the geometric domain to be used as the source for
the extrude meshing operation.
elemFacesSourceSide
A sequence of MeshFace objects specifying the faces of 3D elements to be used as the
source for the extrude meshing operation.
elemSourceSide
A sequence of 2D MeshElement objects specifying the elements to be used as the source
for the extrude meshing operation.
depth
A Float specifying the distance of the mesh extrusion. If unspecified, the vector length
of the *extrudeVector* argument is assumed.
targetSide
A datum plane, a sequence of Face objects, a sequence of MeshFace objects, or a sequence
of 2D MeshElement objects specifying the target of the extrude meshing operation. If
specified, this argument overrides the *depth* argument, and all points on the source
will be extruded in the direction of the extrusion vector until meeting the target.
biasRatio
A Float specifying a ratio of the element size in the extrusion direction between the
source and the target sides of the extrusion. The default is 1.0, meaning no bias.
extendElementSets
A Boolean specifying whether existing element sets that include source elements will be
extended to also include extruded elements. This argument is ignored for native part
instances. The default value is False.
"""
pass
[docs] def generateBottomUpSweptMesh(self, cell: Cell, geometrySourceSide: str = '',
elemFacesSourceSide: tuple[MeshFace] = (),
elemSourceSide: tuple = (), geometryConnectingSides: str = '',
elemFacesConnectingSides: tuple[MeshFace] = (), elemConnectingSides: tuple = (),
targetSide: Face = Face(), numberOfLayers: int = None,
extendElementSets: Boolean = False):
"""This method generates solid elements by sweeping a 2D mesh, either on an orphan mesh or
within a cell region using a bottom-up technique.
Parameters
----------
cell
A Cell object specifying the geometric region where the mesh is to be generated. This
argument is valid only for native part instances.
geometrySourceSide
A Region of Face objects specifying the geometric domain to be used as the source for
the sweep meshing operation.
elemFacesSourceSide
A sequence of MeshFace objects specifying the faces of 3D elements to be used as the
source for the sweep meshing operation.
elemSourceSide
A sequence of 2D MeshElement objects specifying the elements to be used as the source
for the sweep meshing operation.
geometryConnectingSides
A Region of Face objects specifying the connecting sides of the sweep meshing operation.
elemFacesConnectingSides
A sequence of MeshFace objects specifying connecting sides of the sweep meshing
operation.
elemConnectingSides
A sequence of 2D MeshElement objects specifying connecting sides of the sweep meshing
operation.
targetSide
A Face object specifying the target side of the sweep meshing operation.
numberOfLayers
An Int specifying the number of layers to be generated along the sweep direction.
extendElementSets
A Boolean specifying whether existing element sets that include source elements will be
extended to also include swept elements. This argument is ignored for native part
instances. The default value is False.
"""
pass
[docs] def generateBottomUpRevolvedMesh(self, cell: Cell, numberOfLayers: int, axisOfRevolution: tuple,
angleOfRevolution: float,
geometrySourceSide: str = '', elemFacesSourceSide: tuple[MeshFace] = (),
elemSourceSide: tuple = (), extendElementSets: Boolean = False):
"""This method generates solid elements by revolving a 2D mesh around an axis, either on an
orphan mesh or within a cell region using a bottom-up technique.
Parameters
----------
cell
A Cell object specifying the geometric region where the mesh is to be generated. This
argument is valid only for native part instances.
numberOfLayers
An Int specifying the number of layers of elements to be generated around the axis of
revolution.
axisOfRevolution
A sequence of sequences of Floats specifying the two points of the vector that describes
the axis of revolution. Each point is defined by a tuple of three coordinates indicating
its position. The direction of the axis of revolution is from the first point to the
second point. The orientation of the revolution operation follows the right-hand-rule
about the axis of revolution.
angleOfRevolution
A Float specifying the angle of revolution.
geometrySourceSide
A Region of Face objects specifying the geometric domain to be used as the source for
the revolve meshing operation.
elemFacesSourceSide
A sequence of MeshFace objects specifying the faces of 3D elements to be used as the
source for the revolve meshing operation.
elemSourceSide
A sequence of 2D MeshElement objects specifying the elements to be used as the source
for the revolve meshing operation.
extendElementSets
A Boolean specifying whether existing element sets that include source elements will be
extended to also include extruded elements. This argument is ignored for native part
instances. The default value is False.
"""
pass
[docs] def generateMesh(self, regions: tuple[PartInstance] = (), seedConstraintOverride: Boolean = OFF,
meshTechniqueOverride: Boolean = OFF, boundaryPreview: Boolean = OFF,
boundaryMeshOverride: Boolean = OFF):
"""This method generates a mesh in the given part instances or regions.
Parameters
----------
regions
A sequence of PartInstance objects or Region objects specifying the part instances or
regions where the mesh is to be generated.
seedConstraintOverride
A Boolean specifying whether mesh generation is allowed to modify seed constraints. The
default value is OFF.
meshTechniqueOverride
A Boolean specifying whether mesh generation is allowed to modify the existing mesh
techniques so that a compatible mesh can be generated. The default value is OFF.
boundaryPreview
A Boolean specifying whether the generated mesh should be a boundary mesh. This option
will only have an effect if any of the specified regions are to be meshed with
tetrahedral elements or using the bottom-up technique with hexahedral or wedge elements.
The default value is OFF.
boundaryMeshOverride
A Boolean specifying whether mesh generation is allowed to modify an existing boundary
preview mesh. This option will only have an effect if any of the specified regions are
to be meshed with tetrahedral elements and a boundary preview mesh already exists. The
default value is OFF.
"""
pass
[docs] def getEdgeSeeds(self, edge: Edge, attribute: typing.Union[SymbolicConstant, float]):
"""This method returns an edge seed parameter for a specified edge of an assembly.
Parameters
----------
edge
An Edge object specifying the edge to be queried.
attribute
A SymbolicConstant specifying the type of edge seed attribute to return. Possible values
are:
- EDGE_SEEDING_METHOD
- BIAS_METHOD
- NUMBER
- AVERAGE_SIZE
- DEVIATION_FACTOR
- MIN_SIZE_FACTOR
- BIAS_RATIO
- BIAS_MIN_SIZE
- BIAS_MAX_SIZE
- VERTEX_ADJ_TO_SMALLEST_ELEM
- SMALLEST_ELEM_LOCATION
- CONSTRAINT
The return value is dependent on the *attribute* argument.
- If *attribute*=EDGE_SEEDING_METHOD, the return value is a SymbolicConstant specifying
the edge seeding method used to create the seeds along the edge. Possible values are:
- UNIFORM_BY_NUMBER
- UNIFORM_BY_SIZE
- CURVATURE_BASED_BY_SIZE
- BIASED
- NONE
- If *attribute*=BIAS_METHOD, the return value is a SymbolicConstant specifying the bias
type used to create the seeds along the edge. Possible values are:
- SINGLE
- DOUBLE
- NONE
- If *attribute*=NUMBER, the return value is an Int specifying the number of element
seeds along the edge.
- If *attribute*=AVERAGE_SIZE, the return value is a Float specifying the average
element size along the edge.
- If *attribute*=DEVIATION_FACTOR, the return value is a Float specifying the deviation
factor h/Lh/L, where hh is the chordal deviation and LL is the element length. If edge
seeds are not defined, the return value is zero.
- If *attribute*=MIN_SIZE_FACTOR, the return value is a Float specifying the size of the
smallest allowable element as a fraction of the specified global element size. If edge
seeds are not defined, the return value is zero.
- If *attribute*=BIAS_RATIO, the return value is a Float specifying the length ratio of
the largest element to the smallest element.
- If *attribute*=BIAS_MIN_SIZE, the return value is a Float specifying the length of the
largest element; only applicable if the EDGE_SEEDING_METHOD is BIASED and seeds were
specified by minimum and maximum sizes.
- If *attribute*=BIAS_MAX_SIZE, the return value is a Float specifying the length of the
largest element; only applicable if the EDGE_SEEDING_METHOD is BIASED and seeds were
specified by minimum and maximum sizes.
- If *attribute*=VERTEX_ADJ_TO_SMALLEST_ELEM, the return value is an Int specifying the
ID of the vertex next to the smallest element; only applicable if the
EDGE_SEEDING_METHOD is BIASED.
- If *attribute*=SMALLEST_ELEM_LOCATION, the return value is a SymbolicConstant
specifying the location of smallest elements for double bias seeds; only applicable if
the EDGE_SEEDING_METHOD is BIASED and BIAS_METHOD is DOUBLE. Possible values are:
- SMALLEST_ELEM_AT_CENTER
- SMALLEST_ELEM_AT_ENDS
- NONE
- If *attribute*=CONSTRAINT, the return value is a SymbolicConstant specifying how close
the seeds must be matched by the mesh. Possible values are:
- FREE
- FINER
- FIXED
- NONE
A value of NONE indicates that the edge is not seeded.
Returns
-------
The return value is a Float, an Int, or a SymbolicConstant depending on the value of the
*attribute* argument.
"""
pass
[docs] def getElementType(self, region: str, elemShape: SymbolicConstant):
"""This method returns the ElemType object of a given element shape assigned to a region of
the assembly.
Parameters
----------
region
A Cell, a Face, or an Edge object specifying the region to be queried.
elemShape
A SymbolicConstant specifying the shape of the element for which to return the element
type. Possible values are:LINEQUADTRIHEXWEDGETET
Returns
-------
ElemType object.
Raises
------
- TypeError
If the region cannot be associated with element types or if the *elemShape* is not
consistent with the dimension of the *region*.
"""
pass
[docs] def getIncompatibleMeshInterfaces(self, cells: tuple[Cell] = ()):
"""This method returns a sequence of face objects that are meshed with incompatible
elements.
Parameters
----------
cells
A sequence of Cell objects which will be used to search the incompatible faces.
Returns
-------
A sequence of Face objects.
"""
pass
[docs] def getMeshControl(self, region: str, attribute: SymbolicConstant):
"""This method returns a mesh control parameter for the specified region of the assembly.
Parameters
----------
region
A Cell, a Face, or an Edge object specifying the region to be queried.
attribute
A SymbolicConstant specifying the mesh control attribute to return. Possible values are:
- ELEM_SHAPE
- TECHNIQUE
- ALGORITHM
- MIN_TRANSITION
The return value is dependent on the *attribute* argument.
- If *attribute*=ELEM_SHAPE, the return value is a SymbolicConstant specifying the
element shape used during meshing. Possible values are:
- LINE
- QUAD
- TRI
- QUAD_DOMINATED
- HEX
- TET
- WEDGE
- HEX_DOMINATED
- If *attribute*=TECHNIQUE, the return value is a SymbolicConstant specifying the
meshing technique to be used during meshing. Possible values are:
- FREE
- STRUCTURED
- SWEEP
- UNMESHABLE
Where UNMESHABLE indicates that no meshing technique is applicable with the currently
assigned element shape.
- If *attribute*=ALGORITHM, the return value is a SymbolicConstant specifying the
meshing algorithm to be used during meshing. Possible values are:
- MEDIAL_AXIS
- ADVANCING_FRONT
- DEFAULT
- NON_DEFAULT
- NONE
Where NONE indicates that no algorithm is applicable.
- If *attribute*=MIN_TRANSITION, the return value is a Boolean indicating whether
minimum transition will be used during meshing. This option is applicable only to the
following:
- Free quadrilateral meshing or sweep hexahedral meshing with *algorithm*=MEDIAL_AXIS.
- Structured quadrilateral meshing.
Returns
-------
The return value is a SymbolicConstant or a Boolean depending on the value of the
*attribute* argument.
Raises
------
- TypeError
The region cannot carry mesh controls.
"""
pass
[docs] def getMeshStats(self, regions: tuple):
"""This method returns the mesh statistics for the given part instances or regions.
Parameters
----------
regions
A sequence or tuple of PartInstance objects or ConstrainedSketchGeometry regions for which mesh
statistics should be returned.
Returns
-------
A MeshStats object.
"""
pass
[docs] def getPartSeeds(self, region: PartInstance, attribute: typing.Union[SymbolicConstant, float]):
"""This method returns a part seed parameter for the specified instance.
Parameters
----------
region
A PartInstance object specifying the part instance to be queried.
attribute
A SymbolicConstant specifying the type of part seed attribute to return. Possible values
are:
- SIZE
- DEFAULT_SIZE
- DEVIATION_FACTOR
- MIN_SIZE_FACTOR
The return value is dependent on the value of the *attribute* argument.
- If *attribute*=SIZE, the return value is a Float specifying the assigned global
element size. If part seeds are not defined, the return value is zero.
- If *attribute*=DEFAULT_SIZE, the return value is a Float specifying a suggested
default global element size based upon the part geometry.
- If *attribute*=DEVIATION_FACTOR, the return value is a Float specifying the deviation
factor h/Lh/L, where hh is the chordal deviation and LL is the element length. If part
seeds are not defined, the return value is zero.
- If *attribute*=MIN_SIZE_FACTOR, the return value is a Float specifying the size of the
smallest allowable element as a fraction of the specified global element size. If part
seeds are not defined, the return value is zero.
Returns
-------
The return value is a Float, and its value is dependent on the *attribute* argument.
Raises
------
- An exception occurs if the part instance does not contain native geometry.
Error: Part instance does not contain native geometry
"""
pass
[docs] def getUnmeshedRegions(self):
"""This method returns all geometric regions in the assembly that require a mesh for
submitting an analysis but are either unmeshed or are meshed incompletely.
Returns
-------
A Region object, or None.
"""
pass
[docs] def ignoreEntity(self, entities: tuple):
"""This method creates a virtual topology feature. Virtual topology allows unimportant
entities to be ignored during mesh generation. You can combine two adjacent faces by
specifying a common edge to ignore. Similarly, you can combine two adjacent edges by
specifying a common vertex to ignore.
Parameters
----------
entities
A sequence of vertices and edges specifying the entities to be ignored during meshing.
Returns
-------
feature: Feature
A Feature object
"""
pass
[docs] def restoreIgnoredEntity(self, entities: tuple[IgnoredVertex]):
"""This method restores vertices and edges that have been merged using a virtual topology
feature.
Parameters
----------
entities
A sequence of IgnoredVertex objects and IgnoredEdge objects specifying the entities to
be restored.
Returns
-------
feature: Feature
A Feature object
"""
pass
[docs] def seedEdgeByBias(self, biasMethod: SymbolicConstant, end1Edges: tuple[Edge], end2Edges: tuple[Edge],
centerEdges: tuple[Edge], endEdges: tuple[Edge], ratio: float, number: int,
minSize: float, maxSize: float, constraint: SymbolicConstant = FREE):
"""This method seeds the given edges nonuniformly using the specified number of elements
and bias ratio or the specified minimum and maximum element sizes.
Parameters
----------
biasMethod
A SymbolicConstant specifying whether single- or double-biased seed distribution will be
applied. If unspecified, single-biased seed distribution will be applied. Possible
values are:
- SINGLE: Single-biased seed distribution will be applied.
- DOUBLE: Double-biased seed distribution will be applied.
end1Edges
A sequence of Edge objects specifying the edges to seed. The smallest elements will be
positioned near the end where the normalized curve parameter=0.0. You must provide
either the *end1Edges* or the *end2Edges* argument or both when *biasMethod*=SINGLE and
omit both of them when *biasMethod*=DOUBLE.Note:You can determine which end is which by
the order of the vertex indices returned by
[getVertices()](https://help.3ds.com/2022/english/DSSIMULIA_Established/SIMACAEKERRefMap/simaker-c-edgepyc.htm?ContextScope=all#simaker-edgegetverticespyc).
end2Edges
A sequence of Edge objects specifying the edges to seed. The smallest elements will be
positioned near the end where the normalized curve parameter=1.0.
centerEdges
A sequence of Edge objects specifying the edges to seed. The smallest elements will be
positioned near edge center. You must provide either the *centerEdges* or the *endEdges*
argument or both when *biasMethod*=DOUBLE and omit both of them when
*biasMethod*=SINGLE.
endEdges
A sequence of Edge objects specifying the edges to seed. The smallest elements will be
positioned near edge ends.
ratio
A Float specifying the ratio of the largest element to the smallest element. Possible
values are 1.0 ≤≤ *ratio* ≤≤ 106.
number
An Int specifying the number of elements along each edge. Possible values are 1 ≤≤
*number* ≤≤ 104.
minSize
A Float specifying the desired smallest element size.
maxSize
A Float specifying the desired largest element size.Note:You must specify either the
*ratio* and *number* or *minSize* and *maxSize* pair of arguments.
constraint
A SymbolicConstant specifying how closely the seeds must be matched by the mesh. The
default value is FREE. If unspecified, the existing constraint will remain unchanged.
Possible values are:
- FREE: The resulting mesh can be finer or coarser than the specified seeds.
- FINER: The resulting mesh can be finer than the specified seeds.
- FIXED: The seeds must be exactly matched by the mesh (only with respect to the number
of elements, not to the nodal positioning).
"""
pass
[docs] def seedEdgeByNumber(self, edges: tuple[Edge], number: int, constraint: SymbolicConstant = FREE):
"""This method seeds the given edges uniformly based on the number of elements along the
edges.
Parameters
----------
edges
A sequence of Edge objects specifying the edges to seed.
number
An Int specifying the number of elements along each edge. Possible values are 1 ≤≤
*number* ≤≤ 104.
constraint
A SymbolicConstant specifying how closely the seeds must be matched by the mesh. The
default value is FREE. If unspecified, the existing constraint will remain unchanged.
Possible values are:FREE: The resulting mesh can be finer or coarser than the specified
seeds.FINER: The resulting mesh can be finer than the specified seeds.FIXED: The seeds
must be exactly matched by the mesh (only with respect to the number of elements, not to
the nodal positioning).
"""
pass
[docs] def seedEdgeBySize(self, edges: tuple[Edge], size: float, deviationFactor: float = None,
minSizeFactor: float = None, constraint: SymbolicConstant = FREE):
"""This method seeds the given edges either uniformly or following edge curvature
distribution, based on the desired element size.
Parameters
----------
edges
A sequence of Edge objects specifying the edges to seed.
size
A Float specifying the desired element size.
deviationFactor
A Float specifying the deviation factor h/Lh/L, where hh is the chordal deviation and LL
is the element length.
minSizeFactor
A Float specifying the size of the smallest allowable element as a fraction of the
specified global element size.
constraint
A SymbolicConstant specifying how closely the seeds must be matched by the mesh. The
default value is FREE. If unspecified, the existing constraint will remain unchanged.
Possible values are:FREE: The resulting mesh can be finer or coarser than the specified
seeds.FINER: The resulting mesh can be finer than the specified seeds.FIXED: The seeds
must be exactly matched by the mesh (only with respect to the number of elements, not to
the nodal positioning).
"""
pass
[docs] def seedPartInstance(self, regions: tuple[PartInstance], size: float, deviationFactor: float = None,
minSizeFactor: float = None, constraint: SymbolicConstant = FREE):
"""This method assigns global edge seeds to the given part instances.
Parameters
----------
regions
A sequence of PartInstance objects specifying the part instances to seed.
size
A Float specifying the desired global element size for the edges.
deviationFactor
A Float specifying the deviation factor h/Lh/L, where hh is the chordal deviation and LL
is the element length.
minSizeFactor
A Float specifying the size of the smallest allowable element as a fraction of the
specified global element size.
constraint
A SymbolicConstant specifying how closely the seeds must be matched by the mesh. The
default value is FREE. If unspecified, the existing constraint will remain unchanged.
Possible values are:FREE: The resulting mesh can be finer or coarser than the specified
seeds.FINER: The resulting mesh can be finer than the specified seeds.
"""
pass
[docs] def setBoundaryLayerControls(self, regions: tuple[Cell], firstElemSize: float, growthFactor: float, numLayers: int,
inactiveFaces: tuple[Face] = (), setName: str = ''):
"""This method sets the control parameters for boundary layer mesh for the specified
regions.
Parameters
----------
regions
A sequence of Cell objects specifying the regions for which to set the boundary layer
mesh control parameters.
firstElemSize
A Float specifying the height of the first element layer off boundary. Possible values
are 0.0 << *firstElemSize* ≤≤ 106.
growthFactor
A Float specifying the ratio of heights of any two consecutive element layers. Possible
values are 1.0 ≤≤ *growthFactor* ≤≤ 10.0.
numLayers
An Int specifying the number of element layers to be generated. Possible values are 1 ≤≤
*numLayers* ≤≤ 104.
inactiveFaces
A sequence of Face objects specifying the faces where boundary layer should not be
generated. By default, boundary layer mesh will be generated on all faces of the
selected regions.
setName
A String specifying a unique name for a set that will contain boundary layer elements.
"""
pass
[docs] def setElementType(self, regions: tuple, elemTypes: tuple[ElemType]):
"""This method assigns element types to the specified regions.
Parameters
----------
regions
A sequence of ConstrainedSketchGeometry regions or MeshElement objects, or a Set object containing either
geometry regions or elements, specifying the regions to which element types are to be
assigned.
elemTypes
A sequence of ElemType objects, one for each element shape applicable to the
regions.Note:If an ElemType object has an UNKNOWN_*xxx* value for *elemCode*, its order
will be deduced from the order of other valid ElemType objects within the same
setElementType command. If no valid ElemType objects can be found, the order will remain
unchanged.
Raises
------
As a result of the element assignment, a region must have the same library, family, and
order for all its assigned element types. Otherwise, an exception will be thrown.
For example, suppose the Hex, Wedge, and Tet elements previously assigned to a cell are
all linear. The user now constructs an ElemType object with a quadratic Hex element and
includes only this object in the setElementType command. An exception will be thrown
because the Wedge and Tet elements will remain linear (i.e., As Is) and become
incompatible with the newly assigned quadratic Hex element.
"""
pass
[docs] def setLogicalCorners(self, region: str, corners: str):
"""This method sets the logical corners for a mappable face region.
Parameters
----------
region
A Face region.
corners
Three, four, or five ConstrainedSketchVertex objects defining the logical corners for a given mappable
face region.
"""
pass
[docs] def setMeshControls(self, regions: tuple, elemShape: SymbolicConstant = None, technique: SymbolicConstant = None,
algorithm: SymbolicConstant = None, minTransition: Boolean = ON,
sizeGrowth: SymbolicConstant = None, allowMapped: Boolean = OFF):
"""This method sets the mesh control parameters for the specified regions.
Parameters
----------
regions
A sequence of Face or Cell regions specifying the regions for which to set the mesh
control parameters.
elemShape
A SymbolicConstant specifying the element shape to be used for meshing. The default
value is QUAD for Face regions and HEX for Cell regions. If unspecified, the existing
element shape will remain unchanged. Possible values are:
- QUAD: Quadrilateral mesh.
- QUAD_DOMINATED: Quadrilateral-dominated mesh.
- TRI: Triangular mesh.
- HEX: Hexahedral mesh.
- HEX_DOMINATED: Hex-dominated mesh.
- TET: Tetrahedral mesh.
- WEDGE: Wedge mesh.
technique
A SymbolicConstant specifying the mesh technique to be used. The default value is FREE
for Face regions. For Cell regions the initial value depends on the geometry of the
regions and can be STRUCTURED, SWEEP, or unmeshable. If unspecified, the existing mesh
technique(s) will remain unchanged. Possible values are:
- FREE: Free mesh technique.
- STRUCTURED: Structured mesh technique.
- SWEEP: Sweep mesh technique.
- BOTTOM_UP: Bottom-up mesh technique. Only applicable for cell regions.
- SYSTEM_ASSIGN: Allow the system to assign a suitable technique. The actual technique
assigned can be STRUCTURED, SWEEP, or “unmeshable”.
algorithm
A SymbolicConstant specifying the algorithm used to generate the mesh for the specified
regions. Possible values are MEDIAL_AXIS, ADVANCING_FRONT, and NON_DEFAULT. If
unspecified, the existing value will remain unchanged. This option is applicable only to
the following:
- Free quadrilateral or quadrilateral-dominated meshing. In this case the possible
values are MEDIAL_AXIS and ADVANCING_FRONT.
- Sweep hexahedral or hexahedral-dominated meshing. In this case the possible values are
MEDIAL_AXIS and ADVANCING_FRONT.
- Free tetrahedral meshing. In this case the only possible value is NON_DEFAULT, and it
indicates that the free tetrahedral-meshing technique available in Abaqus 6.4 or earlier
will be used. If algorithm is not specified, the default tetrahedral-meshing technique
will be used.
minTransition
A Boolean specifying whether minimum transition is to be applied. The default value is
ON. If unspecified, the existing value will remain unchanged. This option is applicable
only in the following cases:
- Free quadrilateral meshing or hexahedral sweep meshing with *algorithm*=MEDIAL_AXIS.
- Structured quadrilateral meshing.
sizeGrowth
A SymbolicConstant specifying element size growth to be applied when generating the
interior of a tetrahedral mesh. Possible values are MODERATE and MAXIMUM. If
unspecified, the existing value will remain unchanged. This option only applies to the
default tetrahedral mesher.
allowMapped
A Boolean specifying whether mapped meshing can be used to replace the selected mesh
technique. The *allowMapped* argument is applicable only in the following cases:
- Free triangular meshing.
- Free quadrilateral or quadrilateral-dominated meshing with
*algorithm*=ADVANCING_FRONT.
- Hexahedral or hexahedral-dominated sweep meshing with *algorithm*=ADVANCING_FRONT.
- Free tetrahedral meshing. *allowMapped*=True implies that mapped triangular meshing
can be used on faces that bound three-dimensional *regions*.
"""
pass
[docs] def setSweepPath(self, region: str, edge: Edge, sense: SymbolicConstant):
"""This method sets the sweep path for a sweepable region or the revolve path for a
revolvable region.
Parameters
----------
region
A sweepable region.
edge
An Edge object specifying the sweep or revolve path.
sense
A SymbolicConstant specifying the sweep sense. The sense will affect only how gasket
elements will be created; it will have no effect if gasket elements are not used.
Possible values are FORWARD or REVERSE.If *sense*=FORWARD, the sense of the given edge's
underlying curve will be used.
"""
pass
[docs] def verifyMeshQuality(self, criterion: SymbolicConstant, threshold: float = None,
elemShape: SymbolicConstant = None, regions: tuple = ()):
"""This method tests the quality of part instance meshes and returns poor-quality elements.
Parameters
----------
criterion
A SymbolicConstant specifying the criterion used for the quality check. Possible values
are:
- ANALYSIS_CHECKS
When this criterion is specified Abaqus/CAE will invoke the element quality checks
included with the input file processor for Abaqus/Standard and Abaqus/Explicit.
- ANGULAR_DEVIATION
The maximum amount (in degrees) that an element's face corner angles deviate from the
ideal angle. The ideal angle is 90° for quadrilateral element faces and 60° for
triangular element faces. Elements with an angular deviation larger than the specified
threshold will fail this test.
- ASPECT_RATIO
The ratio between the lengths of the longest and shortest edges of an element. Elements
with an aspect ratio larger than the specified threshold will fail this test.
- GEOM_DEVIATION_FACTOR
The largest geometric deviation factor evaluated along any of the element edges
associated with geometric edges or faces. The geometric deviation factor along an
element edge is calculated by dividing the maximum gap between the element edge and its
associated geometry by the length of the element edge. Elements with a geometric
deviation factor larger than the specified threshold will fail this test.
- LARGE_ANGLE
The largest corner angle on any of an element's faces. Elements with face angles larger
than the specified threshold (in degrees) will fail this test.
- LONGEST_EDGE
The length of an element's longest edge. Elements with an edge longer than the specified
threshold will fail this test.
- MAX_FREQUENCY
An estimate of an element's contribution to the initial maximum allowable frequency for
Abaqus/Standard analyses. This calculation requires appropriate section assignments and
material definitions. Elements whose maximum allowable frequency is smaller than the
given value will fail this test.
- SHAPE_FACTOR
The shape factor for triangular and tetrahedral elements. This is the ratio between the
element area or volume and the optimal element area or volume. Elements with a shape
factor smaller than the specified threshold will fail this test.
- SHORTEST_EDGE
The length of an element's shortest edge. Elements with an edge shorter than the
specified threshold will fail this test.
- SMALL_ANGLE
The smallest corner angle on any of an element's faces. Elements with face angles
smaller than the given value (in degrees) will fail this test.
- STABLE_TIME_INCREMENT
An estimate of an element's contribution to the initial maximum stable time increment
for Abaqus/Explicit analyses. This calculation requires appropriate section assignments
and material definitions. Elements that require a time increment smaller than the given
value will fail this test.
threshold
A Float value used to determine low quality elements according to the specified
criterion. This argument is ignored when the ANALYSIS_CHECKS criterion is used. For
other criterion, if this argument is unspecified then no list of failed elements will be
returned.
elemShape
A SymbolicConstant specifying an element shape for limiting the query. Possible values
are LINE, QUAD, TRI, HEX, WEDGE, and TET.
regions
A sequence of Region or MeshElement objects. If you do not specify the *regions*
argument, all meshes in the assembly are considered.
Returns
-------
A Dictionary object containing values for some number of the following keys:
failedElements, warningElements, naElements (sequences of MeshElement objects);
numElements (Int); average, worst (Float); worstElement (MeshElement object) .
"""
pass