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TRS
19.14
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TRS: Used to define temperature-time shift for time history viscoelastic analysis.
This option can be used only in conjunction with the
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VISCOELASTIC option.
In an ABAQUS/Standard analysis, viscoelasticity must be defined in the time dom ain by using the
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VISCOELASTIC option with the TIME parameter.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
References:
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“Time domain viscoelasticity,” Section 17.7.1 of the ABAQUS Analysis User’s Manual
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“UTRS,” Section 1.1.43 of the ABAQUS User Subroutines Reference Manual
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VISCOELASTIC
Optional parameter:
DEFINITION
This parameter applies only to ABAQUS/Standard analyses. In an ABAQUS/E xplicit analysis the
Williams-Landell-Ferry approximation is the only available choice.
Set DEFINITION=WLF (default) to define the shift function by the Williams-Landell-Ferry
approximation.
Set DEFINITION=USER to define the shift function in user subroutine UTRS.
Data line to define the shift function by the Williams -Landell-Ferry approximation:
First (and only) line:
1. Reference temperature, .
2. Calibration constant,
.
3. Calibration constant,
.
To define a shift function not approximated by the WLF function:
No data lines are used with this option when DEFINITION=USER is specified. Instead, user
subroutine UTRS must be used to define the shift function.
19.14–1
ABAQUS Version 6.1 Module:
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