ABAQUS Volume II: I–Z - Manual (Page 175)

*MULLINS EFFECT
13.23 *MULLINS EFFECT: Specify Mullins effect material parameters for elastomers.
This option is used to define material constants for the Mullins effect in filled rubber elastomers or for
modeling energy dissipation in elastomeric foams. It can be used only with the *HYPERELASTIC or the
*HYPERFOAM options.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
References:
•
“Hyperelastic behavior of rubberlike materials,” Section 17.5.1 of the ABAQUS Analysis User’s Manual
•
“Hyperelastic behavior in elastomeric foams,” Section 17.5.2 of the ABAQUS Analysis User’s Manual
•
“Mullins effect in rubberlike materials,” Section 17.6.1 of the ABAQUS Analysis User’s Manual
•
“Energy dissipation in elastomeric foams,” Section 17.6.2 of the ABAQUS Analysis User’s Manual
•
“UMULLINS,” Section 1.1.35 of the ABAQUS User Subroutines Reference Manual
•
*BIAXIAL TEST DATA
•
*PLANAR TEST DATA
•
*UNIAXIAL TEST DATA
Optional, mutually exclusive parameters:
TEST DATA INPUT
Include this parameter if the material constants are to be computed by ABAQUS from data taken
from simple tests on a material specimen. If this parameter is omitted in ABAQUS/Standard, the
material constants may be given directly on the data lines or the damage variable may be defined
through user subroutine UMULLINS. If this parameter is omitted in ABAQUS/Explicit, the material
constants must be given directly on the data lines.
USER
This parameter applies only to ABAQUS/Standard analyses.
Include this parameter if the damage variable defining the Mullins effect is defined in user
subroutine UMULLINS.
Optional parameters:
BETA
This parameter can be used only when the TEST DATA INPUT parameter is used; it defines the
value of
while the other coefficients of the Mullins effect model are fitted from the test data. It
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