J2 creep

Overview

This interface specializes a generic creep rate model to flow. The model creeps in the direction of the deviatoric stress and the scalar creep rate is defined by an additional interface. The creep rate for these types of models is then

with the scalar creep rate a function of effective stress

effective strain

time, and temperature.

Scalar creep models

• Scalar creep models
  • Overview
  • Implementations
    • Power law creep
      • Overview
      • Parameters
      • Class description
        • PowerLawCreep
          • PowerLawCreep::PowerLawCreep()
          • PowerLawCreep::g()
          • PowerLawCreep::dg_ds()
          • PowerLawCreep::dg_de()
          • PowerLawCreep::A()
          • PowerLawCreep::n()
          • PowerLawCreep::type()
          • PowerLawCreep::initialize()
          • PowerLawCreep::parameters()
    • Power law creep
      • Overview
      • Parameters
      • Class description
        • NormalizedPowerLawCreep
          • NormalizedPowerLawCreep::NormalizedPowerLawCreep()
          • NormalizedPowerLawCreep::g()
          • NormalizedPowerLawCreep::dg_ds()
          • NormalizedPowerLawCreep::dg_de()
          • NormalizedPowerLawCreep::type()
          • NormalizedPowerLawCreep::initialize()
          • NormalizedPowerLawCreep::parameters()
    • Regime switching Kocks-Mecking creep
      • Overview
      • Parameters
      • Class description
        • RegionKMCreep
          • RegionKMCreep::RegionKMCreep()
          • RegionKMCreep::g()
          • RegionKMCreep::dg_ds()
          • RegionKMCreep::dg_de()
          • RegionKMCreep::type()
          • RegionKMCreep::initialize()
          • RegionKMCreep::parameters()
    • Norton-Bailey creep
      • Overview
      • Parameters
      • Class description
        • NortonBaileyCreep
          • NortonBaileyCreep::NortonBaileyCreep()
          • NortonBaileyCreep::g()
          • NortonBaileyCreep::dg_ds()
          • NortonBaileyCreep::dg_de()
          • NortonBaileyCreep::A()
          • NortonBaileyCreep::m()
          • NortonBaileyCreep::n()
          • NortonBaileyCreep::type()
          • NortonBaileyCreep::initialize()
          • NortonBaileyCreep::parameters()
    • Mukherjee creep
      • Overview
      • Parameters
      • Class description
        • MukherjeeCreep
          • MukherjeeCreep::MukherjeeCreep()
          • MukherjeeCreep::g()
          • MukherjeeCreep::dg_ds()
          • MukherjeeCreep::dg_de()
          • MukherjeeCreep::A()
          • MukherjeeCreep::n()
          • MukherjeeCreep::D0()
          • MukherjeeCreep::Q()
          • MukherjeeCreep::b()
          • MukherjeeCreep::k()
          • MukherjeeCreep::R()
          • MukherjeeCreep::type()
          • MukherjeeCreep::initialize()
          • MukherjeeCreep::parameters()
    • Generic creep law
      • Overview
      • Parameters
      • Class Description
        • GenericCreep
          • GenericCreep::GenericCreep()
          • GenericCreep::g()
          • GenericCreep::dg_ds()
          • GenericCreep::dg_de()
          • GenericCreep::type()
          • GenericCreep::initialize()
          • GenericCreep::parameters()
    • Blackburn minimum creep rate model
      • Overview
      • Parameters
      • Class description
        • BlackburnMinimumCreep
          • BlackburnMinimumCreep::BlackburnMinimumCreep()
          • BlackburnMinimumCreep::g()
          • BlackburnMinimumCreep::dg_ds()
          • BlackburnMinimumCreep::dg_de()
          • BlackburnMinimumCreep::dg_dT()
          • BlackburnMinimumCreep::type()
          • BlackburnMinimumCreep::initialize()
          • BlackburnMinimumCreep::parameters()
    • Swindeman minimum creep rate model
      • Overview
      • Parameters
      • Class description
        • SwindemanMinimumCreep
          • SwindemanMinimumCreep::SwindemanMinimumCreep()
          • SwindemanMinimumCreep::g()
          • SwindemanMinimumCreep::dg_ds()
          • SwindemanMinimumCreep::dg_de()
          • SwindemanMinimumCreep::dg_dT()
          • SwindemanMinimumCreep::type()
          • SwindemanMinimumCreep::initialize()
          • SwindemanMinimumCreep::parameters()
    • Minimum creep law for 2.25Cr-1Mo steel
      • Overview
      • Parameters
      • Class description
        • MinCreep225Cr1MoCreep
          • MinCreep225Cr1MoCreep::MinCreep225Cr1MoCreep()
          • MinCreep225Cr1MoCreep::g()
          • MinCreep225Cr1MoCreep::dg_ds()
          • MinCreep225Cr1MoCreep::dg_de()
          • MinCreep225Cr1MoCreep::type()
          • MinCreep225Cr1MoCreep::initialize()
          • MinCreep225Cr1MoCreep::parameters()
  • Class description
    • ScalarCreepRule

Class description

class J2CreepModel : public neml::CreepModel

J2 creep based on a scalar creep rule.

Public Functions

J2CreepModel(ParameterSet &params)

Parameters: scalar creep rule, nonlinear tolerance, maximum solver iterations, and a verbosity flag

virtual void f(const double *const s, const double *const e, double t, double T, double *const f) const

creep_rate = dev(s) / ||dev(s)|| * scalar(effective_strain, effective_stress, time, temperature)

virtual void df_ds(const double *const s, const double *const e, double t, double T, double *const df) const

Derivative of creep rate wrt stress.

virtual void df_de(const double *const s, const double *const e, double t, double T, double *const df) const

Derivative of creep rate wrt strain.

virtual void df_dt(const double *const s, const double *const e, double t, double T, double *const df) const

Derivative of creep rate wrt time.

virtual void df_dT(const double *const s, const double *const e, double t, double T, double *const df) const

Derivative of creep rate wrt temperature.

Public Static Functions

static std::string type()

String type for the object system.

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

Initialize an object from a parameter set.

static ParameterSet parameters()

Return the default parameters.