This option is used to define thermal expansion or field expansion in Abaqus/Standard for a material or for the behavior of a gasket. In an Abaqus/Standard analysis spatially varying thermal expansion can be defined for solid continuum elements using a distribution (“Distribution definition,” Section 2.8.1 of the Abaqus Analysis User's Guide). In an Abaqus/CFD analysis this option is used to define thermal expansion for computing bouyancy forces.
Products: Abaqus/Standard Abaqus/Explicit Abaqus/CFD Abaqus/CAE
Type: Model data
Level: Model
Abaqus/CAE: Property module
This parameter applies only to Abaqus/Standard and Abaqus/Explicit analyses.
Set this parameter equal to the number of field variables, in addition to temperature, on which the coefficients depend. If this parameter is omitted, it is assumed that the thermal expansion is constant or depends only on temperature.
This parameter is not relevant if the USER parameter is included or if in an Abaqus/Standard analysis spatially varying thermal expansion is defined using a distribution (see “Distribution definition,” Section 2.8.1 of the Abaqus Analysis User's Guide).
This parameter applies only to Abaqus/Standard analyses.
Set this parameter equal to the predefined field variable number for which field expansion is being defined.
This parameter applies only to Abaqus/Standard analyses.
Include this parameter if the thermal expansion of the pore fluid in a porous medium is being defined. The thermal expansion of a fluid must be isotropic, so TYPE=ORTHO and TYPE=ANISO cannot be used if this parameter is included.
Set TYPE=ISO (default) to define isotropic expansion. The only option that is available in an Abaqus/CFD analysis is TYPE=ISO.
Set TYPE=ORTHO to define orthotropic expansion.
Set TYPE=ANISO to define fully anisotropic expansion in an Abaqus/Standard analysis.
Set TYPE=SHORT FIBER to define laminate material properties for each layer in each shell element. This parameter setting is applicable only when using Abaqus/Standard in conjunction with the abaqus moldflow execution procedure. Any data lines will be ignored. Material properties will be read from the ASCII neutral file identified as jobid.shf. See “Translating Moldflow data to Abaqus input files,” Section 3.2.41 of the Abaqus Analysis User's Guide for more information.
In an Abaqus/Standard analysis spatially varying isotropic, orthotropic, or anisotropic expansion can be defined using a distribution. When using a distribution, the TYPE parameter must be used to indicate the level of anisotropy of thermal expansion. The level of anisotropy must be consistent with that defined in the distribution. See “Distribution definition,” Section 2.8.1 of the Abaqus Analysis User's Guide.
This parameter applies only to Abaqus/Standard analyses.
Include this parameter to indicate that user subroutine UEXPAN will be used to define increments of thermal strain. The TYPE parameter should be used to indicate the level of anisotropy of thermal expansion. The PORE FLUID parameter can also be used to indicate that the thermal expansion of the pore fluid is being defined.
The DEPENDENCIES and ZERO parameters are not relevant if this parameter is used.
If the thermal expansion is temperature- or field-variable-dependent, set this parameter equal to the value of . The default is ZERO=0.
This parameter is not relevant if the USER parameter is included.
In Abaqus/CFD this parameter should be set equal to the reference temperature used for the Boussinesq approximation of buoyancy forces.
First line:
in Abaqus/Standard or Abaqus/Explicit analysis, or in Abaqus/CFD analysis. (Units of –1.)
Temperature.
First field variable.
Etc., up to six field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than six):
Seventh field variable.
Etc., up to eight field variables per line.
Repeat this set of data lines as often as necessary to define the thermal expansion coefficient as a function of temperature and other predefined field variables.
First line:
. (Units of –1.)
.
. (Not used for plane stress and shell cases.)
Temperature.
First field variable.
Etc., up to four field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than four):
Fifth field variable.
Etc., up to eight field variables per line.
Repeat this set of data lines as often as necessary to define the thermal expansion coefficients as functions of temperature and other predefined field variables.
First line:
. (Units of –1.)
.
. (Not used for plane stress and shell cases.)
.
. (Not used for plane stress and shell cases.)
. (Not used for plane stress and shell cases.)
Temperature.
First field variable.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than one):
Second field variable.
Etc., up to eight field variables per line.
Repeat this set of data lines as often as necessary to define the thermal expansion coefficients as functions of temperature and other predefined field variables.
First (and only) line:
Distribution name. The data defined in the distribution must be in units of –1 and must be consistent with the level of anisotropy prescribed by the TYPE parameter.
No data lines are used with this option when the USER parameter is specified. Instead, user subroutine UEXPAN must be used to define the thermal expansion.
First line:
. (Units of –1.)
Temperature.
First field variable.
Etc., up to six field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than six):
Seventh field variable.
Etc., up to eight field variables per line.
Repeat this set of data lines as often as necessary to define the field expansion coefficient as a function of temperature and other predefined field variables.
First line:
. (Units of –1.)
.
.
Temperature.
First field variable.
Etc., up to four field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than four):
Fifth field variable.
Etc., up to eight field variables per line.
Repeat this set of data lines as often as necessary to define the field expansion coefficients as functions of temperature and other predefined field variables.
First line:
. (Units of –1.)
.
. (Not used for plane stress case.)
.
.
.
Temperature.
First field variable.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than one):
Second field variable.
Etc., up to eight field variables per line.
Repeat this set of data lines as often as necessary to define the field expansion coefficients as functions of temperature and other predefined field variables.
No data lines are used with this option when the USER parameter is specified. Instead, user subroutine UEXPAN must be used to define the field expansion.