Power law creep

Overview

This object implements a better-normalized version of power law creep

$\dot{\varepsilon}^{cr} = \left(\frac{\sigma_{eq}}{\sigma_0}\right)^n$

for temperature dependent parameters $\sigma_0$ and $n$ .

Parameter	Object type	Description	Default
`s0`	`neml::Interpolate`	Normalization stress	No
`n`	`neml::Interpolate`	Exponent	No

class NormalizedPowerLawCreep : public neml::ScalarCreepRule 

Power law creep normalized in a slightly nicer way.

Public Functions

NormalizedPowerLawCreep(ParameterSet &params): Parameters: stress divisor s0 and exponent n.

virtual void g(double seq, double eeq, double t, double T, double &g) const: rate = (seq/s0)**n

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.

Public Static Functions

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