18.6.8 Three-dimensional gasket element library

Products: ABAQUS/Standard  ABAQUS/CAE  

References

Element types

Link elements

GK3D22-node, three-dimensional gasket element
GK3D2N2-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

GK3D4L4-node, three-dimensional line gasket element
GK3D4LN4-node, three-dimensional line gasket element with thickness-direction behavior only
GK3D6L6-node, three-dimensional line gasket element
GK3D6LN6-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

GK3D66-node, three-dimensional gasket element
GK3D6N6-node, three-dimensional gasket element with thickness-direction behavior only
GK3D88-node, three-dimensional gasket element
GK3D8N8-node, three-dimensional gasket element with thickness-direction behavior only
GK3D12M12-node, three-dimensional gasket element
GK3D12MN12-node, three-dimensional gasket element with thickness-direction behavior only
GK3D1818-node, three-dimensional gasket element
GK3D18N18-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.

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, Section 18.6.4, for more details.

Input File Usage:           
*GASKET SECTION

ABAQUS/CAE Usage: 

Property module: Create Section: select Other as the section Category and Gasket as the section Type


Element-based loading

None.

Element output

GK3D2 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).

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 integration point numbering

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.