VoceSlipHardening¶

Overview¶

This class implements a Voce hardening model with

$\tau_0 = \tau_0 f = b \left(\tau_{sat}-\tilde{\tau}\right) \tau_{nye} = k \sqrt{\left\Vert \bm{\alpha}\right\Vert _{F}}$

where $\tau_s$ , $b$ , $\tau_{sat}$ , and $k$ all temperature-dependent material properties.

The value of $k$ defaults to zero, which means by default the model is independent of the Nye tensor.

Parameter	Object type	Description	Default
`tau_sat`	`neml::Interpolate`	Saturation strength	N
`b`	`neml::Interpolate`	Rate parameter	N
`tau_0`	`neml::Interpolate`	Static strength	N
`k`	`neml::Interpolate`	Nye hardening constant	0

class VoceSlipHardening : public neml::PlasticSlipHardening ¶

Everyone’s favorite Voce model.

Public Functions

VoceSlipHardening(ParameterSet &params)¶: Initialize with the saturated strength, the rate constant, and a constant strength.

virtual double hist_factor(double strength, Lattice &L, double T, const History &fixed) const¶: Prefactor.

virtual double d_hist_factor(double strength, Lattice &L, double T, const History &fixed) const¶: Derivative of the prefactor.

virtual bool use_nye() const¶: Dynamically determine if we’re going to use the Nye tensor.

virtual double nye_part(const RankTwo &nye, double T) const¶: Actual nye contribution.

Public Static Functions

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