Defining the Gasket Behavior Using a Material Model

The gasket behavior defined by a material model:

  • can be specified in terms of a built-in material model or a user-defined small-strain material model;

  • considers only the thickness behavior and assumes a uniaxial stress state for gasket elements that model thickness-direction behavior only;

  • admits both compressive and tensile stresses in the thickness direction;

  • is defined in terms of small-strain measures and, hence, finite-strain material models such as hyperelastic and hyperfoam cannot be used;

  • is restricted to small-strain elasticity models for line gasket elements that use the built-in material models;

  • causes Abaqus/Standard to use the reference thickness to convert the relative displacements at the top and bottom surfaces of the gasket to strains and uses these strains in conjunction with the constitutive law to obtain the stresses; and

  • makes the notions of “initial gap” and “initial void” in the thickness direction irrelevant (consequently, Abaqus/Standard ignores such data specified as part of the gasket section property definition).

This page discusses:

See Also
About Gasket Elements
In Other Guides
UMAT

ProductsAbaqus/Standard