Abaqus Scripting Reference Guide  


29.77 Plastic object

The Plastic object specifies a metal plasticity model.

Access
import material
mdb.models[name].materials[name].plastic
import odbMaterial
session.odbs[name].materials[name].plastic


29.77.1 Plastic(...)

This method creates a Plastic object.

Path
mdb.models[name].materials[name].Plastic
session.odbs[name].materials[name].Plastic

Required argument

table

A sequence of sequences of Floats specifying the items described below.

Optional arguments

hardening

A SymbolicConstant specifying the type of hardening. Possible values are ISOTROPIC, KINEMATIC, COMBINED, JOHNSON_COOK, and USER. The default value is ISOTROPIC.

rate

A Boolean specifying whether the data depend on rate. The default value is OFF.

dataType

A SymbolicConstant specifying the type of combined hardening. This argument is only valid if hardening=COMBINED. Possible values are HALF_CYCLE, PARAMETERS, and STABILIZED. The default value is HALF_CYCLE.

strainRangeDependency

A Boolean specifying whether the data depend on strain range. This argument is only valid if hardening=COMBINED and dataType=STABILIZED. The default value is OFF.

numBackstresses

An Int specifying the number of backstresses. This argument is only valid if hardening=COMBINED. The default value is 1.

temperatureDependency

A Boolean specifying whether the data depend on temperature. The default value is OFF.

dependencies

An Int specifying the number of field variable dependencies. The default value is 0.

Table data

If hardening=ISOTROPIC, or if hardening=COMBINED and dataType=HALF_CYCLE, the table data specify the following:

  • Yield stress.

  • Plastic strain.

  • Equivalent plastic strain rate, .

  • Temperature, if the data depend on temperature.

  • Value of the first field variable, if the data depend on field variables.

  • Value of the second field variable.

  • Etc.

If hardening=COMBINED and dataType=STABILIZED, the table data specify the following:

  • Yield stress.

  • Plastic strain.

  • Strain range, if the data depend on strain range.

  • Temperature, if the data depend on temperature.

  • Value of the first field variable, if the data depend on field variables.

  • Value of the second field variable.

  • Etc.

If hardening=COMBINED and dataType=PARAMETERS, the table data specify the following:

  • Yield stress at zero plastic strain.

  • The first kinematic hardening parameter, .

  • The first kinematic hardening parameter, .

  • If applicable, the second kinematic hardening parameter, .

  • If applicable, the second kinematic hardening parameter, .

  • Etc.

  • Temperature, if the data depend on temperature.

  • Value of the first field variable, if the data depend on field variables.

  • Value of the second field variable.

  • Etc.

If hardening=KINEMATIC, the table data specify the following:

  • Yield stress.

  • Plastic strain.

  • Temperature, if the data depend on temperature.

If hardening=JOHNSON_COOK, the table data specify the following:

  • A.

  • B.

  • n.

  • m.

  • Melting temperature.

  • Transition temperature.

If hardening=USER, the table data specify the following:

  • Hardening properties.

Return value

A Plastic object.

Exceptions

RangeError.


29.77.2 setValues(...)

This method modifies the Plastic object.

Required arguments

None.

Optional arguments

The optional arguments to setValues are the same as the arguments to the Plastic method.

Return value

None

Exceptions

RangeError.


29.77.3  Members

The Plastic object has members with the same names and descriptions as the arguments to the Plastic method.

In addition, the Plastic object can have the following members:

rateDependent

A RateDependent object.

potential

A Potential object.

cyclicHardening

A CyclicHardening object.

ornl

An Ornl object.

cycledPlastic

A CycledPlastic object.

annealTemperature


29.77.4  Corresponding analysis keywords

*PLASTIC