*CRUSHABLE FOAM HARDENING

Optional parameters

DEPENDENCIES: Set this parameter equal to the number of field variable dependencies included in the definition of the yield surface size, in addition to temperature. If this parameter is omitted, it is assumed that the size of the yield surface depends only on the volumetric plastic strain and, possibly, on the temperature. See Material Data Definition for more information.

Data lines to define crushable foam hardening

First line

$σ_{c}$ , yield stress in uniaxial compression, given as a positive value.
Absolute value of the corresponding plastic strain. (The first tabular value entered must always be zero.)
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 dependence of the yield stress in uniaxial compression on the corresponding axial plastic strain and, if needed, on temperature and other predefined field variables.