*CAP CREEP

Specify a cap creep law and material properties.

This option is used to define a cap creep model and material properties. Creep behavior defined by this option is active only during SOILS, CONSOLIDATION; COUPLED TEMPERATURE-DISPLACEMENT; and VISCO procedures. It must be used in conjunction with the CAP PLASTICITY and the CAP HARDENING options.

Related Topics
*CAP PLASTICITY
*CAP HARDENING
In Other Guides
Modified Drucker-Prager/Cap model
CREEP

ProductsAbaqus/StandardAbaqus/CAE

TypeModel data

LevelModel

Abaqus/CAEProperty module

Optional parameters

DEPENDENCIES

Set this parameter equal to the number of field variable dependencies included in the definition of the creep constants, in addition to temperature. If this parameter is omitted, it is assumed that the creep constants depend only on temperature. See Material data definition for more information.

LAW

Set LAW=STRAIN (default) to choose a strain hardening power law.

Set LAW=TIME to choose a time hardening power law.

Set LAW=SINGHM to choose a Singh-Mitchell type law.

Set LAW=USER to input the creep law using user subroutine CREEP.

MECHANISM

Set MECHANISM=COHESION (default) to choose the cohesion creep mechanism, which is similar in behavior to Drucker-Prager creep.

Set MECHANISM=CONSOLIDATION to choose the consolidation creep mechanism, which is similar in behavior to the cap zone of plasticity.

TIME

This parameter is relevant only when LAW=TIME or LAW=SINGHM is used.

Set TIME=CREEP to use creep time.

Set TIME=TOTAL (default) to use total time.

Data lines for LAW=TIME or LAW=STRAIN

First line

  1. A. (Units of F−nL2nT−1−m.)

  2. n.

  3. m.

  4. Temperature.

  5. First field variable.

  6. Etc., up to four field variables.

Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than four)

  1. Fifth field variable.

  2. Etc., up to eight field variables per line.

Repeat this set of data lines as often as necessary to define the dependence of the creep constants on temperature and other predefined field variables.

Data lines for LAW=SINGHM

First line

  1. A. (Units of T−1.)

  2. α. (Units of F−1L2.)

  3. m.

  4. t1. (Units of T.)

  5. Temperature.

  6. First field variable.

  7. Etc., up to three field variables.

Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than three)

  1. Fourth field variable.

  2. Etc., up to eight field variables per line.

Repeat this set of data lines as often as necessary to define the dependence of the creep constants on temperature and other predefined field variables.