*PIEZORESISTIVITY

Products Abaqus/Standard

Type Model data

LevelModel

Optional parameters

DEPENDENCIES

Set this parameter equal to the number of field variables included in the definition of piezoresistivity. If this parameter is omitted, the piezoresistivity is assumed not to depend on any field variables but may still depend on temperature. See Material Data Definition for more information.

TYPE

Set TYPE=ISOTROPIC (default) to define isotropic behavior.

Set TYPE=CUBIC to define cubic behavior.

Set TYPE=ORTHOTROPIC to define orthotropic behavior.

Set TYPE=ANISOTROPIC to define fully anisotropic behavior.

Data lines to define isotropic piezoresistivity (TYPE=ISOTROPIC)

First line

$π_{1111}$ . (Units of F^-1L².)
$π_{1122}$ .
Temperature, $θ$ .
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 piezoresistivity behavior as a function of temperature and other predefined field variables.

Data lines to define cubic piezoresistivity (TYPE=CUBIC)

First line

$π_{1111}$ . (Units of F^-1L².)
$π_{1122}$ .
$π_{1212}$ .
Temperature, $θ$ .
First field variable.
Second 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 piezoresistivity behavior as a function of temperature and other predefined field variables.

Data lines to define fully anisotropic piezoresistivity directly (TYPE=ANISOTROPIC)

First line

$π_{1111}$ . (Units of F^-1L².)
$π_{1122}$ .
$π_{2222}$ .
$π_{1133}$ .
$π_{2233}$ .
$π_{3333}$ .
$π_{1112}$ .
$π_{2212}$ .

Second line

$π_{3312}$ .
$π_{1212}$ .
$π_{1113}$ .
$π_{2213}$ .
$π_{3313}$ .
$π_{1213}$ .
$π_{1313}$ .
$π_{1123}$ .

Third line

$π_{2223}$ .
$π_{3323}$ .
$π_{1223}$ .
$π_{1323}$ .
$π_{2323}$ .
Temperature.
First field variable.
Second field variable.

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

Third field variable.
Etc., up to eight field variables per line.

Repeat this set of data lines as often as necessary to define the piezoresistivity behavior as a function of temperature and other predefined field variables.

Data lines to define orthotropic piezoresistivity directly (TYPE=ORTHOTROPIC)

First line

$π_{1111}$ . (Units of F^-1L².)
$π_{1122}$ .
$π_{2222}$ .
$π_{1133}$ .
$π_{2233}$ .
$π_{3333}$ .
$π_{1212}$ .
$π_{1313}$ .

Second line

$π_{2323}$ .
Temperature.
First field variable.
Second 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 piezoresistivity behavior as a function of temperature and other predefined field variables.