ABAQUS Volume II: I–Z - Manual (Page 607)

*VISCOELASTIC
21.4 *VISCOELASTIC: Specify dissipative behavior for use with elasticity.
This option is used to generalize a material’s elastic response to include viscoelasticity. The viscoelasticity
can be defined as a function of frequency for steady-state small-vibration analyses or as a function of reduced
time for time-dependent analyses.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
References:
•
“Time domain viscoelasticity,” Section 17.7.1 of the ABAQUS Analysis User’s Manual
•
“Frequency domain viscoelasticity,” Section 17.7.2 of the ABAQUS Analysis User’s Manual
•
*COMBINED TEST DATA
•
*SHEAR TEST DATA
•
*TRS
•
*VOLUMETRIC TEST DATA
Required, mutually exclusive parameters:
FREQUENCY
This parameter applies only to ABAQUS/Standard analyses.
Use this parameter to choose the frequency domain definition. In this case the material’s long-
term elasticity must be defined using the *ELASTIC or the *HYPERELASTIC option.
Set FREQUENCY=CREEP TEST DATA to define the frequency domain response using
a Prony series representation of the relaxation moduli, if the Prony series parameters are to be
computed from shear and volumetric creep test data.
Set FREQUENCY=FORMULA to define the dissipative material parameters by the power law
formulæ.
Set FREQUENCY=PRONY to define the frequency domain response using a Prony series
representation of the relaxation moduli by specifying the Prony series parameters.
Set FREQUENCY=RELAXATION TEST DATA to define the frequency domain response
using a Prony series representation of the relaxation moduli, if the Prony series parameters are to
be computed from shear and volumetric relaxation test data.
Set FREQUENCY=TABULAR to provide tabular definition of the frequency domain
response.
21.4–1
ABAQUS Version 6.1 Module: ID:
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