ProductsAbaqus/StandardAbaqus/ExplicitAbaqus/CAE
TypeModel data
LevelPartPart instanceAssembly
Abaqus/CAEElement-based surfaces are supported by
the
Surface toolset.
Node-based surfaces are not supported; if node-based surfaces are imported into
Abaqus/CAE,
they are treated as sets.
Required parameters
- NAME
-
Set this parameter equal to a label that will be used to refer to the
surface.
Required parameter for cavity radiation simulations
- PROPERTY
-
This parameter applies only to
Abaqus/Standard
analyses.
Set this parameter equal to the name of the
SURFACE PROPERTY definition associated with this surface. See
Cavity Radiation in Abaqus/Standard.
Optional parameters
- COMBINE
-
Set COMBINE=UNION to create a surface based on the union of two or more surfaces
of the same type.
Set COMBINE=INTERSECTION to create a surface based on the intersection of two surfaces
of the same type.
Set COMBINE=DIFFERENCE to create a surface based on the difference of two surfaces of
the same type (the second surface is subtracted from the first).
Only the NAME parameter and, in cavity radiation simulations, the PROPERTY parameter can be used in conjunction with this parameter.
- CROP
-
Include this parameter to create a new surface that will contain only those
faces from an existing surface that have nodes in a specified rectangular box.
Only the NAME parameter and, in cavity radiation simulations, the PROPERTY parameter can be used in conjunction with this parameter.
- DEFINITION
-
This parameter is relevant only for surfaces defined using TYPE=CUTTING SURFACE.
Set DEFINITION=COORDINATES (default) to define the cutting plane by giving the
coordinates of a point on the cutting plane and the normal to the cutting
plane.
Set DEFINITION=NODES to define the cutting plane by giving global node numbers for
point a on the cutting plane and point
b that lies off the cutting plane with the cutting plane
normal determined by the vector from a to
b.
- FILLET RADIUS
-
This parameter can be used with TYPE=SEGMENTS, TYPE=CYLINDER, or TYPE= REVOLUTION to define a radius of curvature to smooth discontinuities
between adjoining straight-line segments, adjoining circular-arc segments, and
adjoining straight-line and circular-arc segments.
- INTERNAL
-
Abaqus/CAE
uses the INTERNAL parameter to identify surfaces that are created internally. The
INTERNAL parameter is used only in models defined in terms of an
assembly of part instances. The default is to omit the INTERNAL parameter.
- REGION TYPE
-
This parameter is relevant only for surfaces defined on the boundary of an
adaptive mesh domain. A surface defined in the interior of an adaptive mesh
domain will move independently of the material unless the surface is
constrained by mesh constraints. See
Defining ALE Adaptive Mesh Domains in Abaqus/Explicit.
Set REGION TYPE=LAGRANGIAN to create a Lagrangian boundary region. The edge of a
Lagrangian boundary region will follow the material while allowing adaptive
meshing along the edge and within the interior of the region.
Set REGION TYPE=SLIDING (default) to create a sliding boundary region. The edge of a
sliding boundary region will slide over the material. Adaptive meshing will
occur on the edge and within the interior of the region. Mesh constraints are
typically applied on the edge of a sliding boundary region to fix it spatially.
Set REGION TYPE=EULERIAN to create an Eulerian boundary region in an adaptive mesh
domain. This option is used to create a boundary region across which material
can flow. Mesh constraints must be used normal to an Eulerian boundary region
to allow material to flow through the region. If no mesh constraints are
applied, an Eulerian boundary region will behave in the same way as a sliding
boundary region.
- TRIM
-
Set
TRIM=YES
to invoke trimming of open free surfaces. Set
TRIM=NO
to suppress surface trimming. The default value is
TRIM=YES
unless the surface is used as a main surface in a finite-sliding contact formulation
in Abaqus/Standard or the surface is used with the contact pair algorithm in Abaqus/Explicit.
TRIM=YES
has no effect on surfaces used with the contact pair algorithm in Abaqus/Explicit.
- TYPE
-
Set TYPE=ELEMENT (default) to define a free surface automatically for the
elements specified or to define a surface on the elements by using element face
identifiers.
Set TYPE=NODE to define a surface by specifying a list of nodes or node set
labels.
Set TYPE=SEGMENTS to create a two-dimensional analytical surface in the
plane for planar models or in the
plane for axisymmetric models by defining connected line segments.
Set TYPE=CYLINDER to define a three-dimensional analytical surface by sweeping
connected line segments defined in a local (x,
y) plane along a specified generator vector.
Set TYPE=REVOLUTION to define a three-dimensional analytical surface by providing
connected line segments, which are given in an
plane and are rotated about an axis.
Set TYPE=CUTTING SURFACE to generate an interior element-based surface using a cutting
plane passing through an element set. The generated surface is an approximation
to the cutting plane.
Set TYPE=EULERIAN MATERIAL to define a surface on the exterior boundary of an Eulerian
material instance. This option applies only to
Abaqus/Explicit.
Set TYPE=USER to define an analytical surface via user subroutine
RSURFU in
Abaqus/Standard.
Set TYPE=XFEM to generate a crack surface for enriched cracked elements.
This option applies only to
Abaqus/Standard.
Crack surfaces for XFEM are not supported with the
CONTACT PAIR option.
Data lines for COMBINE=UNION- First
line
-
List of surfaces.
Repeat this data line as often
as necessary. Up to 16 entries are allowed per
line.
Data line for COMBINE=INTERSECTION or COMBINE=DIFFERENCE- First (and
only) line
-
First surface name.
-
Second surface name.
For COMBINE=DIFFERENCE the second surface is subtracted from the
first.
Data lines to
define a surface when the CROP parameter is included
- First line
-
Surface name.
- Second line
-
X-coordinate of the lower box corner.
-
Y-coordinate of the lower box corner.
-
Z-coordinate of the lower box corner.
-
X-coordinate of the opposite box corner.
-
Y-coordinate of the opposite box corner.
-
Z-coordinate of the opposite box corner.
- Third line (optional)
-
-
X-coordinate of the first point defining the
orientation.
-
Y-coordinate of the first point defining the
orientation.
-
Z-coordinate of the first point defining the
orientation.
-
X-coordinate of the second point defining the
orientation.
-
Y-coordinate of the second point defining the
orientation.
-
Z-coordinate of the second point defining the
orientation.
Data lines to
define a surface using elements or element sets when the TYPE=ELEMENT parameter is used
- First line
-
Element set name or element number. In
Abaqus/Explicit
a blank data line can be specified to automatically generate the exterior
(free) faces of every element in the model.
-
Face or edge identifier label (see
Element-Based Surface Definition
for the face and edge identifiers for various elements) or the “word”
EDGE (optional).
Repeat this data line as often
as necessary to define the
surface.
Data lines to
define a surface using nodes or node sets when the TYPE=NODE parameter is used
- First line
-
Node set name or node number.
-
Cross-sectional area or distributing weight factor. In
Abaqus/Standard
contact calculations, the default is the area specified in the associated
SURFACE INTERACTION option if the surface is defined in a contact pair;
otherwise, a unit area is used. In
Abaqus/Explicit
the cross-sectional area used for contact pair calculations for node-based
surface nodes is always set to 1.0 regardless of the value specified here. If
the surface is used in a
COUPLING or
SHELL TO SOLID COUPLING definition, the default distributing weight factor is zero
in
Abaqus/Standard
and 1.0 in
Abaqus/Explicit.
Repeat this data line as often
as necessary to define the
surface.
Data lines to
define a surface using a plane cutting through the given element sets when TYPE=CUTTING SURFACE, DEFINITION=COORDINATES- First
line
-
X-coordinate of a point on the cutting plane in the
initial configuration.
-
Y-coordinate of a point on the cutting plane in the
initial configuration.
-
Z-coordinate of a point on the cutting plane in the
initial configuration.
-
X-component of a normal to the cutting plane in the
initial configuration.
-
Y-component of a normal to the cutting plane in the
initial configuration.
-
Z-component of a normal to the cutting plane in the
initial configuration.
- Second line
-
List of elements or element set labels to be cut by the cutting plane to
generate an element-based surface that is an approximation to the cutting
plane. A blank data line can be specified to generate a surface by cutting the
whole model.
Repeat this data line as often
as necessary. Up to 16 entries are allowed per
line.
Data lines to
define a surface using a plane cutting through the given element sets when TYPE=CUTTING SURFACE, DEFINITION=NODES- First
line
-
Node number of the node at point a.
-
Node number of the node at point b.
- Second line
-
List of elements or element set labels to be cut by the cutting plane to
generate an element-based surface that is an approximation to the cutting
plane. A blank data line can be specified to generate a surface by cutting the
whole model.
Repeat this data line as often
as necessary. Up to 16 entries are allowed per
line.
Data line to define
surfaces created with TYPE=EULERIAN MATERIAL- First
line
-
Name of the material instance as defined in the
EULERIAN SECTION.
Abaqus/Explicit
will automatically create a surface on the exterior of the given material.
Data lines to
define a crack surface created with TYPE=XFEM- First
line
-
List of names of the enriched features as defined with the
ENRICHMENT option.
Abaqus/Standard
will automatically generate a crack surface as the enriched elements crack.
Repeat this data line as often
as necessary. Up to 16 entries are allowed per
line.
No
data lines are needed for TYPE=USER
Data lines to
define surfaces created with TYPE=SEGMENTS- First
line
-
The “word” START.
-
Global X-coordinate or
r-coordinate of the starting point of the line segments.
-
Global Y-coordinate or
z-coordinate of the starting point of the line segments.
Second and subsequent data lines define the various line, circular, and
parabolic segments (see below for their format) that form the profile of the
analytical surface.
Data lines to
define surfaces created with TYPE=CYLINDER- First line
(leave blank if this surface is being defined within a part or a part
instance)
-
Global X-coordinate of point a,
the origin of the local
system (see
Figure 1).
-
Global Y-coordinate of point a,
the origin of the local
system.
-
Global Z-coordinate of point a,
the origin of the local
system.
-
Global X-coordinate of point b on
the local x-axis.
-
Global Y-coordinate of point b on
the local x-axis.
-
Global Z-coordinate of point b on
the local x-axis.
- Second line (leave blank if this surface is being defined within
a part or a part instance)
-
Global X-coordinate of point c on
the local cylinder generator vector.
-
Global Y-coordinate of point c on
the local cylinder generator vector.
-
Global Z-coordinate of point c on
the local cylinder generator vector.
- Third line
-
The “word” START.
-
Local x-coordinate of the starting point of the line
segments.
-
Local y-coordinate of the starting point of the line
segments.
Fourth and subsequent data lines define the various line, circular, and
parabolic segments (see below for their format) that form the profile of the
analytical surface.
Data lines to
define surfaces created with TYPE=REVOLUTION- First line
(leave blank if this surface is being defined within a part or a part
instance)
-
Global X-coordinate of point a,
the origin of the local
system (see
Figure 2).
-
Global Y-coordinate of point a,
the origin of the local
system.
-
Global Z-coordinate of point a,
the origin of the local
system.
-
Global X-coordinate of point b on
the symmetry axis (the local z-axis).
-
Global Y-coordinate of point b on
the symmetry axis (the local z-axis).
-
Global Z-coordinate of point b on
the symmetry axis (the local z-axis).
- Second line
-
The “word” START.
-
Local r-coordinate of the starting point of the line
segments.
-
Local z-coordinate of the starting point of the line
segments.
Third and subsequent data lines define the various line, circular, and
parabolic segments (see below for their format) that form the profile of the
analytical surface.
Data lines that
define the line segments that form the analytical surface for TYPE=SEGMENTS, TYPE=CYLINDER, and TYPE=REVOLUTION- Data line
to define a straight line segment
-
The “word” LINE.
-
x-coordinate of the end point of the line.
-
y-coordinate of the end point of the line.
- Data line to define a circular arc segment (the arc must be less
than 179.74°)
-
The “word” CIRCL.
-
x-coordinate of the end point of the circular arc.
-
y-coordinate of the end point of the circular arc.
-
x-coordinate of the center (origin) of the circular
arc.
-
y-coordinate of the center (origin) of the circular
arc.
- Data line to define a parabolic arc segment
-
The “word” PARAB.
-
Local x-coordinate of the middle point along the
parabolic arc.
-
Local y-coordinate of the middle point along the
parabolic arc.
-
Local x-coordinate of the end point of the parabolic
arc.
-
Local y-coordinate of the end point of the parabolic
arc.
For surfaces created with TYPE=SEGMENTS, the x- and
y-coordinates are the global X- and
Y-coordinates or r- and
z-coordinates. For surfaces created with TYPE=CYLINDER, the x- and
y-coordinates are the local x- and
y-coordinates. For surfaces created with TYPE=REVOLUTION, the x- and
y-coordinates are the local r- and
z-coordinates.
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