2-node, three-dimensional gasket element with thickness-direction behavior
only
Active Degrees of Freedom
1 for gasket elements with thickness-direction behavior only.
1, 2, 3 for other gasket elements.
Additional Solution Variables
None.
Line Elements
GK3D4L
4-node, three-dimensional line gasket element
GK3D4LN
4-node, three-dimensional line gasket element with thickness-direction
behavior only
GK3D6L
6-node, three-dimensional line gasket element
GK3D6LN
6-node, three-dimensional line gasket element with thickness-direction
behavior only
Active Degrees of Freedom
1 for gasket elements with thickness-direction behavior only.
1, 2, 3 for other gasket elements.
Additional Solution Variables
None.
Area Elements
GK3D6
6-node, three-dimensional gasket element
GK3D6N
6-node, three-dimensional gasket element with thickness-direction behavior
only
GK3D8
8-node, three-dimensional gasket element
GK3D8N
8-node, three-dimensional gasket element with thickness-direction behavior
only
GK3D12M
12-node, three-dimensional gasket element
GK3D12MN
12-node, three-dimensional gasket element with thickness-direction behavior
only
GK3D18
18-node, three-dimensional gasket element
GK3D18N
18-node, three-dimensional gasket element with thickness-direction behavior
only
Active Degrees of Freedom
1 for gasket elements with thickness-direction behavior only.
1, 2, 3 for other gasket elements.
Additional Solution Variables
None.
Coupled Temperature-Displacement Area Elements
GK3D6T
6-node, three-dimensional displacement and temperature gasket element
GK3D6TN
6-node, three-dimensional displacement and temperature gasket element with
thickness-direction behavior only
GK3D8T
8-node, three-dimensional displacement and temperature gasket element
GK3D8TN
8-node, three-dimensional displacement and temperature gasket element with
thickness-direction behavior only
Active Degrees of Freedom
1, 11 for gasket elements with thickness-direction behavior only.
1, 2, 3, 11 for other gasket elements.
Additional Solution Variables
None.
Nodal Coordinates Required
Element Property Definition
You must
define the element's initial gap and initial void, as well as the
cross-sectional area (for link elements) or width (for line elements).
You can specify the thickness direction as part of the gasket section
definition or by specifying a normal direction at the nodes; you can specify
the element thickness as part of the gasket section definition. Otherwise,
Abaqus/Standard
will calculate the thickness direction and the thickness. For link elements the
thickness direction is the direction from the first to the second node and the
thickness is the distance between the nodes. For line elements the thickness
direction is the direction from the bottom node to the top node associated with
the integration point and the thicknesses are the distances between these same
bottom and top nodes. For area elements the thickness direction is based on the
midsurface of the element and the thicknesses at the integration points are
based on the nodal positions. See
Defining the Gasket Element's Initial Geometry
for more details.
Pressure or thickness-direction force in the gasket element.
CS11
Contact pressure in the gasket element (only available if S11 is a force and the gasket response is not defined using a
material model).
S12
Shear stress or shear force.
S13
Shear stress or shear force.
E11
Gasket closure if the gasket response is defined directly using a gasket
behavior model; strain if the gasket response is defined using a material
model.
E12
Shear motion if the gasket response is defined directly using a gasket
behavior model; strain if the gasket response is defined using a material
model.
E13
Shear motion if the gasket response is defined directly using a gasket
behavior model; strain if the gasket response is defined using a material
model.
NE11
Effective thickness-direction strain in the gasket element.
NE12
Effective shear strain.
NE13
Effective shear strain.
GK3D2N Elements
S11
Pressure or thickness-direction force in the gasket element.
CS11
Contact pressure in the gasket element (only available if S11 is a force and the gasket response is not defined using a
material model.)
E11
Gasket closure if the gasket response is defined directly using a gasket
behavior model; strain if the gasket response is defined using a material
model.
NE11
Effective thickness-direction strain in the gasket element.
Line Elements with Thickness-Direction Behavior Only
S11
Pressure or thickness-direction force per unit length in the gasket element.
CS11
Contact pressure in the gasket element (only available if S11 is a force per unit length and the gasket response is not
defined using a material model).
E11
Gasket closure if the gasket response is defined directly using a gasket
behavior model; strain if the gasket response is defined using a material
model.
NE11
Effective thickness-direction strain in the gasket element.
Other Line Elements
S11
Pressure or thickness-direction force per unit length in the gasket element.
CS11
Contact pressure in the gasket element (only available if S11 is a force per unit length and the gasket response is not
defined using a material model).
S22
Direct membrane stress.
S12
Shear stress or shear force per unit length.
S13
Shear stress or shear force per unit length.
E11
Gasket closure if the gasket response is defined directly using a gasket
behavior model; strain if the gasket response is defined using a material
model.
E22
Direct membrane strain.
E12
Shear motion if the gasket response is defined directly using a gasket
behavior model; strain if the gasket response is defined using a material
model.
E13
Shear motion if the gasket response is defined directly using a gasket
behavior model; strain if the gasket response is defined using a material
model.
NE11
Effective thickness-direction strain in the gasket element.
NE22
Direct membrane strain.
NE12
Effective shear strain.
NE13
Effective shear strain.
Area Elements with Thickness-Direction Behavior Only
S11
Pressure in the gasket element.
E11
Gasket closure if the gasket response is defined directly using a gasket
behavior model; strain if the gasket response is defined using a material
model.
NE11
Effective thickness-direction strain in the gasket element.
Other Area Elements
S11
Pressure in the gasket element.
S22
Direct membrane stress.
S33
Direct membrane stress.
S12
Transverse shear stress.
S13
Transverse shear stress.
S23
Membrane shear stress.
E11
Gasket closure if the gasket response is defined directly using a gasket
behavior model; strain if the gasket response is defined using a material
model.
E22
Direct membrane strain.
E33
Direct membrane strain.
E12
Transverse shear motion if the gasket response is defined directly using a
gasket behavior model; strain if the gasket response is defined using a
material model.
E13
Transverse shear motion if the gasket response is defined directly using a
gasket behavior model; strain if the gasket response is defined using a
material model.
E23
Membrane shear strain.
NE11
Effective thickness-direction strain in the gasket element.
NE22
Direct membrane strain.
NE33
Direct membrane strain.
NE12
Effective shear strain.
NE13
Effective shear strain.
NE12
Membrane shear strain.
Node Ordering and Face Numbering on Elements
Link Elements
Line Elements
Area Elements
Table 1. 6-node element
Face 1 (SPOS)
4 – 6 – 5 face
Face 2 (SNEG)
1 – 2 – 3 face
Table 2. 8-node element
Face 1 (SPOS)
5 – 8 – 7 – 6 face
Face 2 (SNEG)
1 – 2 – 3 – 4 face
Table 3. 12-node element
Face 1 (SPOS)
7 – 12 – 9 – 11 – 8 – 10 face
Face 2 (SNEG)
1 – 4 – 2 – 5 – 3 – 6 face
Table 4. 18-node element
Face 1 (SPOS)
9 – 16 – 12 – 15 – 11 – 14 – 10 – 13
face
Face 2 (SNEG)
1 – 5 – 2 – 6 – 3 – 7 – 4 – 8 face
Numbering of Integration Points for Output
Link Elements
Line Elements
Area Elements
Integration points are indicated with an X and have the same numbers as the
bottom face nodes, except that the point between nodes 17 and 18 in the 18-node
gasket element is integration point number 9.
