This option is used to apply surface radiation boundary conditions between a nonconcave surface and a nonreflecting environment in fully coupled thermal-stress analysis or to define an approximate cavity radiation interaction. In Abaqus/Standard it is also used for heat transfer, coupled thermal-electrical, and coupled thermal-electrical-structural analyses.
It must be used in conjunction with the *PHYSICAL CONSTANTS option, which is used to define the Stefan-Boltzmann constant.
Products: Abaqus/Standard Abaqus/Explicit Abaqus/CAE
Type: History data
Level: Step
Abaqus/CAE: Interaction module
“Thermal loads,” Section 32.4.4 of the Abaqus Analysis User's Manual
“Cavity radiation,” Section 39.1.1 of the Abaqus Analysis User's Manual
Set this parameter equal to the name of the *AMPLITUDE option that gives the variation of the ambient temperature with time.
If this parameter is omitted in an Abaqus/Standard analysis, the reference magnitude is applied immediately at the beginning of the step or linearly over the step, depending on the value assigned to the AMPLITUDE parameter on the *STEP option (see “Procedures: overview,” Section 6.1.1 of the Abaqus Analysis User's Manual). If this parameter is omitted in an Abaqus/Explicit analysis, the reference magnitude is applied immediately at the beginning of the step.
First line:
Surface name.
Radiation type label R.
Reference ambient temperature value, 
. (Units of 
.)
Emissivity, 
.
Repeat this data line as often as necessary to define radiation conditions for different surfaces.
First line:
Surface name.
Radiation type label AVG.
Leave this field blank.
Emissivity, .
Repeat this data line as often as necessary to define radiation conditions for different surfaces.