ABAQUS Volume II: I–Z - Manual (Page 617)

*VOLUMETRIC TEST DATA
21.7 *VOLUMETRIC TEST DATA: Provide volumetric test data.
This option can be used only in conjunction with the *HYPERELASTIC option, the *HYPERFOAM option,
or the *VISCOELASTIC option.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
Hyperelastic material model
Volumetric loading test data can be provided by this option to include user-defined material compressibility.
Compressibility can alternatively be included by using the POISSON parameter on the *HYPERELASTIC
option or, in the case of the Marlow model, by specifying the nominal lateral strain under the *UNIAXIAL
TEST DATA option. If none of these options is used to specify volumetric behavior, ABAQUS/Standard
assumes that the material is incompressible, while ABAQUS/Explicit will select a default value for the
compressibility.
See the discussion under “Compressibility” in “Hyperelastic behavior of rubberlike
materials,” Section 17.5.1 of the ABAQUS Analysis User’s Manual, before using this option in
ABAQUS/Explicit.
References:
•
“Hyperelastic behavior of rubberlike materials,” Section 17.5.1 of the ABAQUS Analysis User’s Manual
•
*HYPERELASTIC
Optional parameter:
SMOOTH
Include this parameter to apply a smoothing filter to the stress-strain data. If the parameter is omitted,
no smoothing is performed.
Set this parameter equal to the number n such that is equal to the total number of
data points in the moving window through which a cubic polynomial is fit using the least-squares
method. n should be larger than 1. The default is SMOOTH=3.
Optional parameter when the *VOLUMETRIC TEST DATA option is used in conjunction with the
*HYPERELASTIC, MARLOW option:
DEPENDENCIES
Set this parameter equal to the number of field variable dependencies included in the definition of
the test data. If this parameter is omitted, it is assumed that the test data depend only on temperature.
21.7–1
ABAQUS Version 6.1 Module: ID:
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