| Abaqus Keywords Reference Guide |
|
| How to find keyword examples |
| Abaqus Keywords Reference Guide |
|
| How to find keyword examples |
This option is used to define the dashpot behavior for dashpot elements.
In Abaqus/Standard analyses it is also used to define the dashpot behavior for ITS and JOINTC elements. If the *DASHPOT option is being used to define part of the behavior of ITS or JOINTC elements, it must be used in conjunction with the *ITS or *JOINT options and the ELSET and ORIENTATION parameters should not be used.
Products: Abaqus/Standard Abaqus/Explicit Abaqus/CAE
Type: Model data
Level: Part, Part instance, Assembly
Abaqus/CAE:
Set this parameter equal to the name of the element set containing the dashpot elements for which this behavior is being defined.
Set this parameter equal to the number of field variable dependencies included in the definition of the dashpot coefficient, in addition to temperature. If this parameter is omitted, it is assumed that the dashpot coefficient is independent of field variables. See “Specifying field variable dependence” in “Material data definition,” Section 21.1.2 of the Abaqus Analysis User's Guide, for more information.
Include this parameter to define nonlinear dashpot behavior. Omit this parameter to define linear dashpot behavior.
This parameter applies only to Abaqus/Standard analyses.
If the option is being used to define the behavior of DASHPOT1 or DASHPOT2 elements, this parameter can be used to refer to an orientation definition so that the dashpot is acting in a local system. Set this parameter equal to the name of the *ORIENTATION definition (“Orientations,” Section 2.2.5 of the Abaqus Analysis User's Guide).
This parameter applies only to Abaqus/Explicit analyses.
Set this parameter equal to the tolerance to be used for regularizing the material data. The default is RTOL=0.03. See “Material data definition,” Section 21.1.2 of the Abaqus Analysis User's Guide, for a discussion of data regularization.
First line:
Enter a blank line.
Second line:
Dashpot coefficient (force per relative velocity).
In an Abaqus/Standard analysis this field corresponds to frequency (in cycles per time, for *STEADY STATE DYNAMICS, DIRECT and *STEADY STATE DYNAMICS, SUBSPACE PROJECTION analyses only). Leave this field blank in an Abaqus/Explicit analysis.
Temperature.
First field variable.
Second field variable.
Etc., up to five field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than five):
Sixth field variable.
Etc., up to eight field variables per line.
Repeat this set of data lines as often as necessary to define the dashpot coefficient as a function of frequency, temperature, and other predefined field variables.
First line:
Enter a blank line.
Second line:
Force.
Relative velocity.
Temperature.
First field variable.
Second field variable.
Etc., up to five field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than five):
Sixth field variable.
Etc., up to eight field variables per line.
Repeat this set of data lines as often as necessary to define the dashpot coefficient as a function of temperature and other predefined field variables.
First line:
Give the degree of freedom with which the dashpots are associated at their first nodes or, for JOINTC elements, the degree of freedom in the local corotational system for which the dashpot behavior is being defined.
For DASHPOT2 elements give the degree of freedom with which the dashpots are associated at their second nodes.
If the ORIENTATION parameter is included on the *DASHPOT option when defining dashpot elements or on the *JOINT option when defining joint elements, the degrees of freedom specified here are in the local system defined by the *ORIENTATION option referenced.
Second line:
Dashpot coefficient (force per relative velocity).
Frequency (in cycles per time, for *STEADY STATE DYNAMICS, DIRECT and *STEADY STATE DYNAMICS, SUBSPACE PROJECTION analyses only).
Temperature.
First field variable.
Second field variable.
Etc., up to five field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than five):
Sixth field variable.
Etc., up to eight variables per line.
Repeat this set of data lines as often as necessary to define the dashpot coefficient as a function of frequency, temperature, and other predefined field variables.
First line:
Give the degree of freedom with which the dashpots are associated at their first nodes or, for JOINTC elements, the degree of freedom in the local corotational system for which the dashpot behavior is being defined.
For DASHPOT2 elements give the degree of freedom with which the dashpots are associated at their second nodes.
If the ORIENTATION parameter is included on the *DASHPOT option when defining dashpot elements or on the *JOINT option when defining joint elements, the degrees of freedom specified here are in the local system defined by the *ORIENTATION option referenced.
Second line:
Force.
Relative velocity.
Temperature.
First field variable.
Second field variable.
Etc., up to five field variables.
Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than five):
Sixth field variable.
Etc., up to eight field variables per line.
Repeat this set of data lines as often as necessary to define the dashpot coefficient as a function of temperature and other predefined field variables.