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PHYSICAL C ONSTANTS
16.7
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PHYSICAL CONSTANTS: Specify physical constants.
This option is used to define physical constants necessary for an analysis; since ABAQUS has no built-in
units, no default values are provided. If a physical constant required for the analysis is not given, ABAQUS
will issue a fatal error message. The units used for the constants must be consistent with the remaining input
data.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
References:
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“Uncoupled heat transfer analysis,” Section 6.5.2 of the ABAQUS A nalysis User’s Manual
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“Mass diffusion analysis,” Section 6.8.1 of the ABAQ US Analysis User ’s Manual
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“Modeling fluid-filled cavities,” Section 11.5.1 of the ABAQUS Analysis U ser’s Manual
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“Rate-dependent plasticity: creepand swelling,” Section 18.2.4 of the ABAQUS AnalysisUser’s Manual
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“Hydrostatic fluid models,” Section 20.4.1 of the ABAQUS Analysis User’s Manual
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“Diffusivity,” Section 20.5.1 of the ABAQUS Analysis User’s Manual
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“Solubility,” Section 20.5.2 of the ABAQUS Analysis User’s Manual
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“Thermal contact properties,” Section 30.2.1 of the A BAQ US Analysis User’s Manual
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“Cavity radiation,” Section 32.1.1 of the ABAQUS Analysis User’s Manual
Optional parameters:
ABSOLUTE ZERO
Set this parameter equal to the absolute zero on the temperature scale chosen. For example, if the
analysis uses temperature in degrees Celsius, set ABSOLUTE ZERO=−273.15.
STEFAN BOLTZMANN
Set this parameter equal to the Stefan Boltzmann constant. For exam ple, STEFAN
BOLTZMANN=5.669 × 10
−8
Joule per sec m
2
Kelvin
4
in SI units.
UNIVERSAL GA S CONSTANT
Set this parameter equal to the universal gas constant. For example, UNIVERSAL GAS
CONSTANT=8.31434 Joule per mole Kelvin in SI units.
There are no data lines associated with this option.
16.7–1
ABAQUS Version 6.1 Module:
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