www.mooseframework.org
Public Member Functions | Protected Attributes | List of all members
PowerLawSoftening Class Reference

PowerLawSoftening is a smeared crack softening model that uses a power law equation to soften the tensile response. More...

#include <PowerLawSoftening.h>

Inheritance diagram for PowerLawSoftening:
[legend]

Public Member Functions

 PowerLawSoftening (const InputParameters &parameters)
 
virtual void computeCrackingRelease (Real &stress, Real &stiffness_ratio, const Real strain, const Real crack_initiation_strain, const Real crack_max_strain, const Real cracking_stress, const Real youngs_modulus) override
 Compute the effect of the cracking release model on the stress and stiffness in the direction of a single crack. More...
 
void resetQpProperties () final
 Retained as empty methods to avoid a warning from Material.C in framework. These methods are unused in all inheriting classes and should not be overwritten. More...
 
void resetProperties () final
 

Protected Attributes

const Real & _stiffness_reduction
 Reduction factor applied to the initial stiffness each time a new crack initiates. More...
 

Detailed Description

PowerLawSoftening is a smeared crack softening model that uses a power law equation to soften the tensile response.

It is for use with ComputeSmearedCrackingStress.

Definition at line 26 of file PowerLawSoftening.h.

Constructor & Destructor Documentation

◆ PowerLawSoftening()

PowerLawSoftening::PowerLawSoftening ( const InputParameters &  parameters)

Definition at line 30 of file PowerLawSoftening.C.

31  : SmearedCrackSofteningBase(parameters),
32  _stiffness_reduction(getParam<Real>("stiffness_reduction"))
33 {
34 }
const Real & _stiffness_reduction
Reduction factor applied to the initial stiffness each time a new crack initiates.
SmearedCrackSofteningBase(const InputParameters &parameters)

Member Function Documentation

◆ computeCrackingRelease()

void PowerLawSoftening::computeCrackingRelease ( Real &  stress,
Real &  stiffness_ratio,
const Real  strain,
const Real  crack_initiation_strain,
const Real  crack_max_strain,
const Real  cracking_stress,
const Real  youngs_modulus 
)
overridevirtual

Compute the effect of the cracking release model on the stress and stiffness in the direction of a single crack.

Parameters
stressStress in direction of crack
stiffness_ratioRatio of damaged to original stiffness in cracking direction
strainStrain in the current crack direction
crack_initiation_strainStrain in crack direction when crack first initiated
crack_max_strainMaximum strain in crack direction
cracking_stressThreshold tensile stress for crack initiation
youngs_modulusYoung's modulus

Implements SmearedCrackSofteningBase.

Definition at line 37 of file PowerLawSoftening.C.

44 {
45  if (stress > cracking_stress)
46  {
47  // This is equivalent to k = k_0 * (stiffness_reduction)^n, where n is the number of cracks
48  stiffness_ratio *= _stiffness_reduction;
49  stress = stiffness_ratio * youngs_modulus * strain;
50  }
51 }
const Real & _stiffness_reduction
Reduction factor applied to the initial stiffness each time a new crack initiates.

◆ resetProperties()

void SmearedCrackSofteningBase::resetProperties ( )
inlinefinalinherited

Definition at line 57 of file SmearedCrackSofteningBase.h.

57 {}

◆ resetQpProperties()

void SmearedCrackSofteningBase::resetQpProperties ( )
inlinefinalinherited

Retained as empty methods to avoid a warning from Material.C in framework. These methods are unused in all inheriting classes and should not be overwritten.

Definition at line 56 of file SmearedCrackSofteningBase.h.

56 {}

Member Data Documentation

◆ _stiffness_reduction

const Real& PowerLawSoftening::_stiffness_reduction
protected

Reduction factor applied to the initial stiffness each time a new crack initiates.

Definition at line 41 of file PowerLawSoftening.h.

Referenced by computeCrackingRelease().


The documentation for this class was generated from the following files: