29.56 GasketThicknessBehavior object

The GasketThicknessBehavior object defines the behavior in the thickness direction for a gasket.

Access

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

29.56.1 GasketThicknessBehavior(...)

This method creates a GasketThicknessBehavior object.

Path

mdb.models[name].materials[name].GasketThicknessBehavior
session.odbs[name].materials[name].GasketThicknessBehavior

Required argument

table

A sequence of sequences of Floats specifying loading data. The first sequence must contain only 0. At least two sequences must be specified if type=DAMAGE, and at least 3 sequences must be specified if type=ELASTIC_PLASTIC. The items in the table data are described below.

Optional arguments

temperatureDependency

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

dependencies

An Int specifying the number of field variable dependencies included in the definition of the loading data, in addition to temperature. The default value is 0.

tensileStiffnessFactor

A Float specifying the fraction of the initial compressive stiffness that defines the stiffness in tension. The default value is 10^–3.

type

A SymbolicConstant specifying a damage elasticity model or an elastic-plastic model for gasket thickness-direction behavior. Possible values are ELASTIC_PLASTIC and DAMAGE. The default value is ELASTIC_PLASTIC.

unloadingDependencies

An Int specifying the number of field variable dependencies included in the definition of the unloading data, in addition to temperature. The default value is 0.

unloadingTemperatureDependency

A Boolean specifying whether unloading data depends on temperature. The default value is OFF.

variableUnits

A SymbolicConstant specifying the behavior in terms of units of force (or force in unit length) versus closure or pressure versus closure. Possible values are STRESS and FORCE. The default value is STRESS.

yieldOnset

A Float specifying the closure value at which the onset of yield occurs or the relative drop in slope on the loading curve that defines the onset of plastic deformation (depending on the value of yieldOnsetMethod). The default value is 0.1.

yieldOnsetMethod

A SymbolicConstant specifying the method used to determine yield onset. Possible values are RELATIVE_SLOPE_DROP and CLOSURE_VALUE. The default value is RELATIVE_SLOPE_DROP.

unloadingTable

A sequence of sequences of Floats specifying unloading data. The items in the table data are described below. The default value is an empty sequence.

Table data

If variableUnits=STRESS, the loading table data specify the following:

Pressure; this value must be positive.
Closure; this value must be positive.
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 variableUnits=FORCE, the loading table data specify the following:

Force or force per unit length; this value must be positive.
Closure; this value must be positive.
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 variableUnits=STRESS and type=ELASTIC_PLASTIC, the unloadingTable data specify the following:

Pressure; this value must be positive.
Closure; this value must be positive.
Plastic closure; this value must be positive.
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 variableUnits=FORCE and type=ELASTIC_PLASTIC, the unloadingTable data specify the following:

Pressure; this value must be positive.
Closure; this value must be positive.
Plastic closure; this value must be positive.
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 variableUnits=STRESS and type=DAMAGE, the unloadingTable data specify the following:

Pressure; this value must be positive.
Closure; this value must be positive.
Maximum closure reached while loading the gasket; this value must be positive.
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 variableUnits=FORCE and type=DAMAGE, the unloadingTable data specify the following:

Force or force per unit length; this value must be positive.
Closure; this value must be positive.
Maximum closure reached while loading the gasket; this value must be positive.
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.

Return value

A GasketThicknessBehavior object.

Exceptions

RangeError.

29.56.2 setValues(...)

This method modifies the GasketThicknessBehavior object.

Required arguments

None.

Optional arguments

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

Return value

None

Exceptions

RangeError.

29.56.3 Members

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

In addition, the GasketThicknessBehavior object can have the following member:

contactArea

A ContactArea object.

29.56.4 Corresponding analysis keywords

*GASKET THICKNESS BEHAVIOR