VocePerSystemHardening¶

Overview¶

This model provides a Voce hardening response on each individual slip system. The hardening evolution on each system is independent of all other systems and each slip system can have its own Voce parameters:

$\dot{\bar{\tau}}_{k} = k_k \left(1 - \frac{\bar{\tau}_k - \tau_{0,k}}{\tau_{sat,k} - \tau_{0,k}} \right)^{m}$

Parameters¶

Parameter	Object type	Description	Default
`k`	`std::vector`	Hardening prefactors	N
`saturation`	`std::vector`	Saturated hardening values	N
`m`	`std::vector`	Voce exponents	N
`initial`	`std::vector<double>`	Initial strengths	N

Class description¶

class VocePerSystemHardening : public neml::SlipHardening ¶

Voce model with one hardening variable per system.

Public Functions

VocePerSystemHardening(ParameterSet &params)¶

virtual std::vector<std::string> varnames() const¶: Report your variable names.

virtual void set_varnames(std::vector<std::string> vars)¶: Set new varnames.

virtual void populate_hist(History &history) const¶: Request whatever history you will need.

virtual void init_hist(History &history) const¶: Setup history.

virtual double hist_to_tau(size_t g, size_t i, const History &history, Lattice &L, double T, const History &fixed) const¶: Map the set of history variables to the slip system hardening.

virtual History d_hist_to_tau(size_t g, size_t i, const History &history, Lattice &L, double T, const History &fixed) const¶: Derivative of the map wrt to history.

virtual History hist(const Symmetric &stress, const Orientation &Q, const History &history, Lattice &L, double T, const SlipRule &R, const History &fixed) const¶: The rate of the history.

virtual History d_hist_d_s(const Symmetric &stress, const Orientation &Q, const History &history, Lattice &L, double T, const SlipRule &R, const History &fixed) const¶: Derivative of the history wrt stress.

virtual History d_hist_d_h(const Symmetric &stress, const Orientation &Q, const History &history, Lattice &L, double T, const SlipRule &R, const History &fixed) const¶: Derivative of the history wrt the history.

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()¶: Default parameters.