Swindeman minimum creep rate model

Overview

This object implements the minimum creep rate model given in [S1999]:

$\dot{\varepsilon}^{cr} = C \sigma_{eq}^n \exp{V \sigma_{eq}} \exp{\frac{-Q}{T}}$

for constants $C$ , $n$ , $V$ , and $Q$ .

Parameter	Object type	Description	Default
`C`	`double`	Prefactor	No
`n`	`double`	Exponent	No
`V`	`double`	Exponential factor	No
`Q`	`double`	Activation energy	No

class SwindemanMinimumCreep : public neml::ScalarCreepRule 

Creep rate law from Swindeman 1999.

Public Functions

virtual void g(double seq, double eeq, double t, double T, double &g) const: rate = C * S^n * exp(V*S) * exp(-Q/T)

virtual void dg_ds(double seq, double eeq, double t, double T, double &dg) const: Derivative of rate wrt effective stress.

virtual void dg_de(double seq, double eeq, double t, double T, double &dg) const: Derivative of rate wrt effective strain = 0.

virtual void dg_dT(double seq, double eeq, double t, double T, double &dg) const: Derivative of rate wrt temperature.

Public Static Functions

static std::unique_ptr<NEMLObject> initialize(ParameterSet &params): Setup from a parameter set.