Eos object

Eos(...)

This method creates an Eos object.

Path

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

Required arguments

None.

Optional arguments

type

A SymbolicConstant specifying the equation of state. Possible values are USUP, JWL, IDEALGAS, TABULAR, and IGNITIONANDGROWTH. The default value is IDEALGAS.

temperatureDependency

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

dependencies

An Int specifying the number of field variable dependencies for the data in gasSpecificTable. The default value is 0.

detonationEnergy

A Float specifying the detonation energy text field. The default value is 0.0.

solidTable

A sequence of sequences of Floats specifying the following:

$A_{s}$.
$B_{s}$.
${\omega}_{s}$.
$R_{1s}$.
$R_{2s}$.

The default value is an empty sequence.

gasTable

A sequence of sequences of Floats specifying the following:

$A_{g}$.
$B_{g}$.
${\omega}_{g}$.
$R_{1g}$.
$R_{2g}$.

The default value is an empty sequence.

reactionTable

A sequence of sequences of Floats specifying the following:

Initial Pressure, $I$.
Product co-volume, $a$.
Exponent on the unreacted fraction (ignition term), $x$.
First burn rate coefficient, $G_{1}$
Exponent on the unreacted fraction (growth term), $c$.
Exponent on the reacted fraction (growth term), $d$.
Pressure exponent (growth term), $y$.
Second burn rate coefficient, $G_{2}$.
Exponent on the unreacted fraction (completion term), $e$.
Exponent on the reacted fraction (completion term), $g$.
Pressure exponent (completion term), $z$.
Initial reacted fraction, ${F^{max}}_{ig}$.
Maximum reacted fraction for the growth term, ${F^{max}}_{G1}$.
Minimum reacted fraction, ${F^{min}}_{G2}$.

The default value is an empty sequence.

gasSpecificTable

A sequence of sequences of Floats specifying the following:

Specific Heat per unit mass.
Temperature dependent data.
Value of first field variable.
Value of second field variable.
Etc.

The default value is an empty sequence.

table

A sequence of sequences of Floats specifying the items described below. The default value is an empty sequence.

Table data

If type=IDEALGAS, the table data represents the following:

Gas constant, $R$ .
The ambient pressure, $p_{A}$ . If this field is left blank, a default of 0.0 is used.

If type=JWL, the table data represents the following:

Detonation wave speed, $C_{d}$ .
$A$ .
$B$ .
$ω$ . (Dimensionless.)
$R_{1}$ . (Dimensionless.)
$R_{2}$ . (Dimensionless.)
Pre-detonation bulk modulus, $K_{p d}$ .
Detonation energy density, $E_{0}$ .

If type=USUP, the table data represents the following:

$c_{0}$ .
$s$ . (Dimensionless.)
$Γ_{0}$ . (Dimensionless.)

If type=TABULAR, the table data represents the following:

$F_{1}$ .
$F_{2}$ .
$ε_{v o l}^{c}$ . (Dimensionless.)

Return value

An Eos object.

Exceptions

None.

setValues(...)

This method modifies the Eos object.

Required arguments

None.

Optional arguments

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

Return value

None.

Exceptions

None.

Members

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

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

detonationPoint: A DetonationPoint object.
eosCompaction: An EosCompaction object.
tensileFailure: A TensileFailure object.

Eos object

Access

Eos(...)

Path

Required arguments

Optional arguments

Table data

Return value

Exceptions

setValues(...)

Required arguments

Optional arguments

Return value

Exceptions

Members

Corresponding analysis keywords