Walker kinematic hardening models

Overview

Models providing the kinematic hardening contribution in the Walker Alloy 617 model subsystem.

Base class

class KinematicHardening : public neml::InternalVariable<Symmetric>

Subclassed by neml::FAKinematicHardening, neml::WalkerKinematicHardening

Public Functions

KinematicHardening(ParameterSet &params)

inline void set_scaling(std::shared_ptr<ThermalScaling> scale)

virtual Symmetric ratet(VariableState &state)

Return zero for time rate by default.

virtual SymSymR4 d_ratet_d_h(VariableState &state)

Return zero for the time rate derivatives by default.

virtual Symmetric d_ratet_d_a(VariableState &state)

Return zero for the time rate derivatives by default.

virtual Symmetric d_ratet_d_adot(VariableState &state)

Return zero for the time rate derivatives by default.

virtual Symmetric d_ratet_d_D(VariableState &state)

Return zero for the time rate derivatives by default.

virtual SymSymR4 d_ratet_d_s(VariableState &state)

Return zero for the time rate derivatives by default.

virtual SymSymR4 d_ratet_d_g(VariableState &state)

Return zero for the time rate derivatives by default.

virtual Symmetric rateT(VariableState &state)

Return zero for temperature rate by default.

virtual SymSymR4 d_rateT_d_h(VariableState &state)

Return zero for the temperature rate derivatives by default.

virtual Symmetric d_rateT_d_a(VariableState &state)

Return zero for the temperature rate derivatives by default.

virtual Symmetric d_rateT_d_adot(VariableState &state)

Return zero for the temperature rate derivatives by default.

virtual Symmetric d_rateT_d_D(VariableState &state)

Return zero for the temperature rate derivatives by default.

virtual SymSymR4 d_rateT_d_s(VariableState &state)

Return zero for the temperature rate derivatives by default.

virtual SymSymR4 d_rateT_d_g(VariableState &state)

Return zero for the temperature rate derivatives by default.

Frederick-Armstrong hardening

The Frederick-Armstrong [FA2007] model, implemented in the Walker subsystem:

Parameters

Parameter	Object type	Description	Default
c	neml::Interpolate	Hardening constant	No
g	neml::Interpolate	Dynamic recover constant	No
scale	neml::ThermalScaling	Thermal scaling model	No scaling

Class description

class FAKinematicHardening : public neml::KinematicHardening

Standard Frederick-Armstrong hardening.

Public Functions

FAKinematicHardening(ParameterSet &params)

virtual Symmetric initial_value()

virtual Symmetric ratep(VariableState &state)

virtual SymSymR4 d_ratep_d_h(VariableState &state)

virtual Symmetric d_ratep_d_a(VariableState &state)

virtual Symmetric d_ratep_d_adot(VariableState &state)

virtual Symmetric d_ratep_d_D(VariableState &state)

virtual SymSymR4 d_ratep_d_s(VariableState &state)

virtual SymSymR4 d_ratep_d_g(VariableState &state)

Public Static Functions

static std::string type()

String type for the object system.

static std::unique_ptr<NEMLObject> initialize(ParameterSet &params)

Initialize from a parameter set.

static ParameterSet parameters()

Return default parameters.

Walker’s specific model

The specific kinematic hardening model described in Walker Alloy 617 model subsystem.

Parameters

Parameter	Object type	Description	Default
c0	neml::Interpolate	Constant hardening parameter	No
c1	neml::Interpolate	Hardening evolution prefactor	No
c2	neml::Interpolate	Hardening evolution exponent	No
l0	neml::Interpolate	Dynamic recovery exponential rate	No
l1	neml::Interpolate	Dynamic recovery evolution prefactor	No
l	neml::Interpolate	Constant dynamic recovery coeficient	No
b0	neml::Interpolate	Recovery direction constant	No
x0	neml::Interpolate	Static recovery prefactor	No
x1	neml::Interpolate	Static recovery exponent	No
softening	neml::SofteningModel	Softening model	No
scale	neml::ThermalScaling	Thermal scaling model	No scaling

Class description

class WalkerKinematicHardening : public neml::KinematicHardening

Walker’s kinematic hardening model.

Public Functions

WalkerKinematicHardening(ParameterSet &params)

virtual Symmetric initial_value()

virtual Symmetric ratep(VariableState &state)

virtual SymSymR4 d_ratep_d_h(VariableState &state)

virtual Symmetric d_ratep_d_a(VariableState &state)

virtual Symmetric d_ratep_d_adot(VariableState &state)

virtual Symmetric d_ratep_d_D(VariableState &state)

virtual SymSymR4 d_ratep_d_s(VariableState &state)

virtual SymSymR4 d_ratep_d_g(VariableState &state)

virtual Symmetric ratet(VariableState &state)

Return zero for time rate by default.

virtual SymSymR4 d_ratet_d_h(VariableState &state)

Return zero for the time rate derivatives by default.

virtual Symmetric d_ratet_d_a(VariableState &state)

Return zero for the time rate derivatives by default.

virtual Symmetric d_ratet_d_adot(VariableState &state)

Return zero for the time rate derivatives by default.

virtual Symmetric d_ratet_d_D(VariableState &state)

Return zero for the time rate derivatives by default.

virtual SymSymR4 d_ratet_d_s(VariableState &state)

Return zero for the time rate derivatives by default.

virtual SymSymR4 d_ratet_d_g(VariableState &state)

Return zero for the time rate derivatives by default.

Public Static Functions

static std::string type()

String type for the object system.

static std::unique_ptr<NEMLObject> initialize(ParameterSet &params)

Initialize from a parameter set.

static ParameterSet parameters()

Return default parameters.