Public Member Functions | Public Attributes | List of all members
MarmotMaterialHypoElasticAD Class Referenceabstract

#include <MarmotMaterialHypoElasticAD.h>

Inheritance diagram for MarmotMaterialHypoElasticAD:
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Public Member Functions

void setCharacteristicElementLength (double length)
 
virtual void computeStress (double *stress, double *dStressDDStrain, const double *FOld, const double *FNew, const double *timeOld, const double dT, double &pNewDT) override
 
virtual void computeStress (autodiff::dual *stress, const autodiff::dual *dStrain, const double *timeOld, const double dT, double &pNewDT)=0
 
virtual void computePlaneStress (double *stress2D, double *dStress_dStrain2D, const double *dStrain2D, const double *timeOld, const double dT, double &pNewDT)
 
virtual void computeUniaxialStress (double *stress1D, double *dStress_dStrain1D, const double *dStrain, const double *timeOld, const double dT, double &pNewDT)
 
virtual void computePlaneStress (double *stress2D, double *dStress_dF2DNew, const double *FOld2D, const double *FNew2D, const double *timeOld, const double dT, double &pNewDT)
 
virtual void computeUniaxialStress (double *stress1D, double *dStress1D_dF1DNew, const double *F1DOld, const double *F1DNew, const double *timeOld, const double dT, double &pNewDT)
 
- Public Member Functions inherited from MarmotMaterialMechanical
virtual void computePlaneStress (double *stress2D, double *dStress_dF2DNew, const double *FOld2D, const double *FNew2D, const double *timeOld, const double dT, double &pNewDT)
 
virtual void computeUniaxialStress (double *stress1D, double *dStress1D_dF1DNew, const double *F1DOld, const double *F1DNew, const double *timeOld, const double dT, double &pNewDT)
 
 MarmotMaterial (const double *materialProperties, int nMaterialProperties, int materialNumber)
 
- Public Member Functions inherited from MarmotMaterial
 MarmotMaterial (const double *materialProperties, int nMaterialProperties, int materialNumber)
 
virtual ~MarmotMaterial ()
 
virtual int getNumberOfRequiredStateVars ()=0
 
virtual void assignStateVars (double *stateVars, int nStateVars)
 
virtual StateView getStateView (const std::string &stateName)=0
 
double * getAssignedStateVars ()
 
int getNumberOfAssignedStateVars ()
 
virtual void initializeYourself ()
 

Public Attributes

double characteristicElementLength
 Characteristic element length. More...
 
- Public Attributes inherited from MarmotMaterial
const int materialNumber
 

Additional Inherited Members

- Protected Attributes inherited from MarmotMaterial
const double * materialProperties
 
const int nMaterialProperties
 
double * stateVars
 
int nStateVars
 

Detailed Description

Derived abstract base class for elastic materials expressed purely in rate form.

In general, the nominal stress rate tensor \( \sigRate \) can be written as a function of the nominal stress tensor \( \sig \), the stretching rate tensor \( \epsRate \) and the time \( t \).

\[ \displaystyle \sigRate = f( \sig, \epsRate, t, ...) \]

In course of numerical time integration, this relation will be formulated incrementally as

\[ \displaystyle \Delta \sig = f ( \sig_n, \Delta\eps, \Delta t, t_n, ...) \]

with

\[ \displaystyle \Delta\eps = \epsRate\, \Delta t \]

and the algorithmic tangent

\[ \displaystyle \frac{d \sig }{d \eps } = \frac{d \Delta \sig }{d \Delta \eps } \]

This formulation is compatible with an Abaqus interface.

Member Function Documentation

◆ setCharacteristicElementLength()

void MarmotMaterialHypoElasticAD::setCharacteristicElementLength ( double  length)

Set the characteristic element length at the considered quadrature point. It is needed for the regularization of materials with softening behavior based on the mesh-adjusted softening modulus.

Parameters
[in]lengthcharacteristic length; will be assigned to characteristicElementLength

◆ computeStress() [1/2]

void MarmotMaterialHypoElasticAD::computeStress ( double *  stress,
double *  dStressDDStrain,
const double *  FOld,
const double *  FNew,
const double *  timeOld,
const double  dT,
double &  pNewDT 
)
overridevirtual

For a given deformation gradient at the old and the current time, compute the Cauchy stress and the algorithmic tangent \(\frac{\partial\boldsymbol{\sigma}^{(n+1)}}{\partial\boldsymbol{F}^{(n+1)}}\).

Todo:
A default implementation is provided.
Parameters
[in,out]stressCauchy stress
[in,out]dSdEAlgorithmic tangent representing the derivative of the Cauchy stress tensor with respect to the deformation gradient \(\boldsymbol{F}\)
[in]FOldDeformation gradient at the old (pseudo-)time
[in]FNewDeformation gradient at the current (pseudo-)time
[in]timeOldOld (pseudo-)time
[in]dt(Pseudo-)time increment from the old (pseudo-)time to the current (pseudo-)time
[in,out]pNewDTSuggestion for a new time increment

Implements MarmotMaterialMechanical.

◆ computeStress() [2/2]

virtual void MarmotMaterialHypoElasticAD::computeStress ( autodiff::dual *  stress,
const autodiff::dual *  dStrain,
const double *  timeOld,
const double  dT,
double &  pNewDT 
)
pure virtual

For a given linearized strain increment \(\Delta\boldsymbol{\varepsilon}\) at the old and the current time, compute the Cauchy stress and the algorithmic tangent \(\frac{\partial\boldsymbol{\sigma}^{(n+1)}}{\partial\boldsymbol{\varepsilon}^{(n+1)}}\).

Parameters
[in,out]stressCauchy stress
[in,out]dStressDDstrainAlgorithmic tangent representing the derivative of the Cauchy stress tensor with respect to the linearized strain
[in]dStrainlinearized strain increment
[in]timeOldOld (pseudo-)time
[in]dt(Pseudo-)time increment from the old (pseudo-)time to the current (pseudo-)time
[in,out]pNewDTSuggestion for a new time increment

◆ computePlaneStress() [1/2]

void MarmotMaterialHypoElasticAD::computePlaneStress ( double *  stress2D,
double *  dStress_dStrain2D,
const double *  dStrain2D,
const double *  timeOld,
const double  dT,
double &  pNewDT 
)
virtual

◆ computeUniaxialStress() [1/2]

void MarmotMaterialHypoElasticAD::computeUniaxialStress ( double *  stress1D,
double *  dStress_dStrain1D,
const double *  dStrain,
const double *  timeOld,
const double  dT,
double &  pNewDT 
)
virtual

◆ computePlaneStress() [2/2]

void MarmotMaterialMechanical::computePlaneStress

Plane stress implementation of computeStress.

◆ computeUniaxialStress() [2/2]

void MarmotMaterialMechanical::computeUniaxialStress

Uniaxial stress implementation of computeStress.

Member Data Documentation

◆ characteristicElementLength

double MarmotMaterialHypoElasticAD::characteristicElementLength

Characteristic element length.

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