Required parameters
- PROPERTY
-
Use this parameter to specify the property type being assigned. To modify
more than one type of surface property, include the
SURFACE PROPERTY ASSIGNMENT option
more than once with different values for this parameter.
Set PROPERTY=BEAM SMOOTHING to control smoothing of beam segments in beam-to-beam contact.
This parameter value applies only to
Abaqus/Standard
analyses.
Set PROPERTY=CRUSH TRIGGER to control crush initiation of a crushable surface. This
parameter value applies only to
Abaqus/Explicit
analyses.
Set
PROPERTY=DISTRIBUTION FACTOR
to specify the preferred fraction of frictional work directed to this surface. This
parameter value applies only to Abaqus/Explicit analyses.
Set PROPERTY=FEATURE EDGE CRITERIA to control which primary feature edges and secondary feature
edges should be activated in the general contact domain.
Set PROPERTY=FRICTION to assign a surface-based friction coefficient. This parameter
value applies only to
Abaqus/Explicit
analyses.
Set PROPERTY=GEOMETRIC CORRECTION to assign geometric corrections.
Set PROPERTY=OFFSET FRACTION to assign the surface offset as a fraction of the surface
thickness.
Set PROPERTY=ORIENTATION to assign a coordinate system for local tangent directions to
the surface and/or specify preferential frictional directions to the surface in
the context of surface-based anisotropic friction. This parameter value applies
only to
Abaqus/Explicit
analyses.
Set PROPERTY=THICKNESS to assign the surface thickness.
Set PROPERTY=VERTEX CRITERIA to control which nodes of feature edges should be considered
vertex nodes in the general contact domain. This parameter value applies only
to
Abaqus/Standard
analyses.
Optional parameters
- DEFINITION
-
This parameter is relevant only for surface properties defined using PROPERTY=GEOMETRIC CORRECTION.
Set DEFINITION=COORDINATES (default) to define the parameters for the geometry correction
by giving the coordinates of one or more points, depending on the surface
shape.
Set DEFINITION=NODES to define the parameters for the geometry correction by giving
the global number of one or more nodes, depending on the surface shape.
- FRICTION ANISOTROPY
-
This parameter applies only to
Abaqus/Explicit
analyses with PROPERTY=ORIENTATION.
Set FRICTION ANISOTROPY=EPSILON (default) to define the frictional directional preference
factor
on the data lines.
Set FRICTION ANISOTROPY=RATIO to define the ratio r on the data lines.
Data lines for PROPERTY=BEAM SMOOTHING
- First
line
-
-
Surface name.
-
A scalar value between 0.0 and 0.5 (0.2 is the default).
Repeat this data line as often
as necessary. If the beam smoothing assignments overlap, the last assignment
applies in the overlap
region.
Data lines for
PROPERTY=CRUSH TRIGGER
- First line
-
-
Surface name or material name.
-
Specify TRIGGER (default),
NO TRIGGER, or NO
CRUSH. If NO TRIGGER or
NO CRUSH is specified, no further entries are
needed.
-
A scalar value representing the stress required to initiate crushable
behavior as a factor of the crush stress (CRUSH STRESS) defined on the material associated with the surface.
- Crush
initiation angle.
- Crush continuation
angle.
-
Specify SURFACE (default) or omit if the
first entry is a surface name. Specify
MATERIAL if the first entry is a material
name.
Repeat this data line as often
as necessary. If the crush trigger assignments overlap, the last assignment
applies in the overlap
region.
Data lines for
PROPERTY=DISTRIBUTION FACTOR
- First line
-
Surface name or material name.
Preferred fraction of frictional work of an interaction directed to this
surface. The default value is 0.5.
Specify SURFACE (default) or omit if the
first entry is a surface name. Specify MATERIAL
if the first entry is a material name.
Repeat this data line as often as necessary. If the distribution
factor assignments overlap, the last assignment applies in the overlap
region.
Data lines for PROPERTY=FEATURE EDGE CRITERIA in
Abaqus/Standard
- First line
-
-
Surface name or material name. If this entry is omitted, a default surface
that encompasses the entire general contact domain is assumed.
-
A scalar value between 0° and 180° representing the cutoff feature angle (in
degrees), PERIMETER EDGES, or
NO FEATURE EDGES. The default is 45°. This
field activates edges to participate in edge-to-surface contact.
-
This field is intentionally left blank and is unused.
-
A scalar value between 0° and 180° representing the cutoff feature angle (in
degrees), PERIMETER EDGES, or
NO FEATURE EDGES. The entry on this field
activates edges to participate in edge-to-edge contact. The default is
NO FEATURE EDGES.
-
Specify SURFACE (default) or omit if the
first entry is a surface name. Specify
MATERIAL if the first entry is a material
name.
Repeat this data line as often
as necessary. If the feature edge criteria assignments overlap, the last
assignment applies in the overlap
region.
Data lines for PROPERTY=FEATURE EDGE CRITERIA in
Abaqus/Explicit
- First line
-
-
Surface name or material name. If this entry is omitted, a default surface
that encompasses the entire general contact domain is assumed. A non-blank
entry is required if the ALL EDGES or
PICKED EDGES options are specified for the
second entry and ORIGINAL is in effect for the
fifth entry.
-
The criterion for primary feature edges. A scalar value representing the
cutoff feature angle in degrees (the default value is 30° if
CURRENT is specified for the fifth entry),
PERIMETER EDGES (the default option if
ORIGINAL is in effect for the fifth entry),
ALL EDGES, PICKED
EDGES, or NO FEATURE EDGES.
-
The criterion for secondary feature edges. A scalar value representing the
cutoff feature angle in degrees (the default is 20° if
CURRENT is specified for the fifth entry),
ALL REMAINING EDGES, PERIMETER
EDGES, or PICKED EDGES. The
default secondary feature edge criterion matches the primary feature edge
criterion if ORIGINAL is in effect for the
fifth entry.
- This
field is intentionally left blank and is unused.
- The word
ORIGINAL (default except when ALL
EDGES is specified for the second entry) to apply feature edge
criteria statically or the word CURRENT to apply
feature edge criteria for this surface dynamically.
-
This field is intentionally left blank and is unused.
-
Specify SURFACE (default) or omit if the
first entry is a surface name. Specify
MATERIAL if the first entry is a material
name.
Repeat this data line as
often as necessary. If the feature edge criteria assignments overlap, the last
assignment applies in the overlap
region.
Data lines for
PROPERTY=FRICTION
- First line
-
-
Surface name or material name.
-
Surface-based friction coefficient.
-
Specify SURFACE (default) or omit if the
first entry is a surface name. Specify
MATERIAL if the first entry is a material
name.
Repeat this data line as often
as necessary. If the feature edge criteria assignments overlap, the last
assignment applies in the overlap
region.
Data
lines for PROPERTY=GEOMETRIC CORRECTION, DEFINITION=COORDINATES to define smoothing on regions of surfaces
- First line
-
-
Surface name.
-
Specify CIRCUMFERENTIAL,
SPHERICAL,
TOROIDAL,
NONE, or leave blank. If
NONE or blank is specified, no further entries
are required.
-
Global X-coordinate of point a
(see
Figure 1
through
Figure 4,
depending on surface shape).
-
Global Y-coordinate of point a.
-
Global Z-coordinate of point a
(only for three-dimensional).
-
Global X-coordinate of point b
(only for three-dimensional circumferential or toroidal; see
Figure 2
or
Figure 4,
depending on surface shape).
-
Global Y-coordinate of point b
(only for three-dimensional circumferential or toroidal).
-
Global Z-coordinate of point b
(only for three-dimensional circumferential or toroidal).
-
Distance R (only for three-dimensional toroidal; see
Figure 4).
Repeat this data line as often
as necessary. If the geometry correction assignments overlap, the last
assignment applies in the overlap region. For toroidal shapes the line joining
point a and the center of the circular arc should be
perpendicular to the axis of
revolution.
Data
lines for PROPERTY=GEOMETRIC CORRECTION, DEFINITION=NODES to define smoothing on regions of surfaces
- First line
-
-
Surface name.
-
Specify CIRCUMFERENTIAL,
SPHERICAL,
TOROIDAL,
NONE, or leave blank. If
NONE or blank is specified, no further entries
are required.
-
Node number of the node at point a (see
Figure 1
through
Figure 4,
depending on surface shape).
-
Node number of the node at point b (only for
three-dimensional circumferential or toroidal; see
Figure 2
or
Figure 4,
depending on surface shape).
-
Distance R (only for three-dimensional toroidal; see
Figure 4).
Repeat this data line as often
as necessary. If the geometry correction assignments overlap, the last
assignment applies in the overlap region. For toroidal shapes the line joining
point a and the center of the circular arc should be
perpendicular to the axis of
revolution.
Data lines for PROPERTY=OFFSET FRACTION
- First
line
-
-
Surface name or material name. If this entry is omitted, a default surface
that encompasses the entire general contact domain is assumed. Faces specified
on elements other than shell elements, membrane elements, rigid elements, and
surface elements will be ignored.
-
ORIGINAL (default),
SPOS, SNEG,
or a value between –0.5 and 0.5. The offset defines the distance (as a fraction
of the thickness) from the midsurface to the reference surface (containing the
nodes of the element). Positive values of the offset are in the positive
element normal direction. The default is
ORIGINAL, which indicates that the offset
specified in element section definitions (via the OFFSET parameter on
SHELL SECTION or
RIGID BODY) will be used.
-
Specify SURFACE (default) or omit if the
first entry is a surface name. Specify
MATERIAL if the first entry is a material
name.
Repeat this data line as often
as necessary. If the offset fraction assignments overlap, the last assignment
applies in the overlap
region.
Data lines for PROPERTY=ORIENTATION
- First
line
-
- Surface name or
material name.
- A valid orientation
system name. If the orientation system name is omitted or the surface is an
analytic rigid one, a default orientation is used.
- Scalar value of the
extra rotation (in degrees) applied to the orientation system once it has been
projected to the surface. The default value is 0.
- Scalar value of the
frictional directional preference factor
(within the range –1.0 to 1.0, default 0.0) or the friction coefficients ratio
r (greater than 0.0, default 1.0) depending on the value
of the FRICTION ANISOTROPY parameter.
-
Specify SURFACE (default) or omit if the
first entry is a surface name. Specify
MATERIAL if the first entry is a material
name.
Repeat this data line as
often as necessary. If the directional preference assignments overlap, the last
assignment applies in the overlap
region.
Data lines for PROPERTY=THICKNESS
- First
line
-
-
Surface name or material name. If this entry is omitted, a default surface
that encompasses the entire general contact domain is assumed.
-
ORIGINAL (default),
THINNING (available only in
Abaqus/Explicit),
or a scalar value representing a nominal thickness.
-
A constant scaling factor (default is 1.0).
-
Specify SURFACE (default) or omit if the
first entry is a surface name. Specify
MATERIAL if the first entry is a material
name.
Repeat this data line as often
as necessary. If the thickness assignments overlap, the last assignment applies
in the overlap
region.
Data lines for
PROPERTY=VERTEX CRITERIA
- First line
-
-
Surface name or material name. If this entry is omitted, a default surface
that encompasses the entire general contact domain is assumed.
-
ALL VERTICES, NO
VERTICES, or a scalar value between 10° and 90° representing
the vertex angle threshold (in degrees). The default is 20°. This field
activates vertex nodes to participate in vertex-to-surface contact.
-
Specify SURFACE (default) or omit if the
first entry is a surface name. Specify
MATERIAL if the first entry is a material
name.
Repeat this data line as often
as necessary. If the vertex criteria assignments overlap, the last assignment
applies in the overlap
region.
|