*CRUSHABLE FOAM

Specify the crushable foam plasticity model.

This option is used to specify the plastic part of the material behavior for elastic-plastic materials that use the crushable foam plasticity model. It must be used in conjunction with the CRUSHABLE FOAM HARDENING option.

This page discusses:

See Also
*CRUSHABLE FOAM HARDENING
In Other Guides
Crushable Foam Plasticity Models

ProductsAbaqus/StandardAbaqus/ExplicitAbaqus/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 crushable foam parameters, in addition to temperature. If this parameter is omitted, it is assumed that the crushable foam parameters are constant or depend only on temperature. See Material Data Definition for more information.

HARDENING

Set HARDENING=VOLUMETRIC (default) to specify the volumetric hardening model.

Set HARDENING=ISOTROPIC to specify the isotropic hardening model.

Data lines to define the crushable foam plasticity model with volumetric hardening (HARDENING=VOLUMETRIC)

First line

  1. k=σc0/pc0, yield stress ratio for compression loading; 0<k<3. Enter the ratio of initial yield stress in uniaxial compression to initial yield stress in hydrostatic compression.

  2. kt=pt/pc0, yield stress ratio for hydrostatic loading; kt≥0. Enter the ratio of yield stress in hydrostatic tension to initial yield stress in hydrostatic compression, given as a positive value. The default value is 1.0.

  3. Temperature.

  4. First field variable.

  5. Second field variable.

  6. Etc., up to five field variables.

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

  1. Sixth 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 crushable foam parameters on temperature and other predefined field variables.

Data lines to define the crushable foam plasticity model with isotropic hardening (HARDENING=ISOTROPIC)

First line

  1. k=σc0/pc0, yield stress ratio for compression loading; 0≤k<3. Enter the ratio of initial yield stress in uniaxial compression to initial yield stress in hydrostatic compression.

  2. νp, plastic Poisson's ratio; -1<νp≤0.5.

  3. Temperature.

  4. First field variable.

  5. Second field variable.

  6. Etc., up to five field variables.

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

  1. Sixth 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 crushable foam parameters on temperature and other predefined field variables.