OOFEM  2.4
OOFEM.org - Object Oriented Finite Element Solver
oofem::Eurocode2CreepMaterial Class Reference

This class implements a model for concrete creep and shrinkage according to EuroCode 2 The creep is assumed to be linear (formula from section 3.7 is not considered here) with aging. More...

#include <eurocode2creep.h>

+ Inheritance diagram for oofem::Eurocode2CreepMaterial:
+ Collaboration diagram for oofem::Eurocode2CreepMaterial:

Public Member Functions

 Eurocode2CreepMaterial (int n, Domain *d)
 
virtual ~Eurocode2CreepMaterial ()
 
virtual void giveRealStressVector (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedStrain, TimeStep *tStep)
 Computes the real stress vector for given total strain and integration point. More...
 
virtual void giveShrinkageStrainVector (FloatArray &answer, GaussPoint *gp, TimeStep *tStep, ValueModeType mode)
 Computes, for the given integration point, the strain vector induced by stress-independent shrinkage. More...
 
virtual const char * giveClassName () const
 
virtual const char * giveInputRecordName () const
 
virtual IRResultType initializeFrom (InputRecord *ir)
 Initializes receiver according to object description stored in input record. More...
 
virtual MaterialStatusCreateStatus (GaussPoint *gp) const
 Creates new copy of associated status and inserts it into given integration point. More...
 
virtual double computeConcreteStrengthAtAge (double age)
 evaluates concrete strength at given age More...
 
virtual double computeMeanElasticModulusAtAge (double age)
 evaluates concrete mean elastic modulus at given age More...
 
virtual double computeCreepFunction (double t, double t_prime, GaussPoint *gp, TimeStep *tStep)
 Evaluation of the compliance function. More...
 
virtual double computeCreepCoefficient (double t, double t_prime, GaussPoint *gp, TimeStep *tStep)
 Evaluation of the compliance function (according to appendix B from the EC) More...
 
- Public Member Functions inherited from oofem::KelvinChainMaterial
 KelvinChainMaterial (int n, Domain *d)
 
virtual ~KelvinChainMaterial ()
 
virtual int hasNonLinearBehaviour ()
 Returns nonzero if receiver is non linear. More...
 
virtual void giveEigenStrainVector (FloatArray &answer, GaussPoint *gp, TimeStep *tStep, ValueModeType mode)
 Computes, for the given integration point, the strain vector induced by the stress history (typically creep strain). More...
 
void computeHiddenVars (GaussPoint *gp, TimeStep *tStep)
 
- Public Member Functions inherited from oofem::RheoChainMaterial
 RheoChainMaterial (int n, Domain *d)
 
virtual ~RheoChainMaterial ()
 
virtual void giveRealStressVector_3d (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 Default implementation relies on giveRealStressVector for second Piola-Kirchoff stress. More...
 
virtual void giveRealStressVector_PlaneStrain (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 Default implementation relies on giveRealStressVector_3d. More...
 
virtual void giveRealStressVector_PlaneStress (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 Default implementation relies on giveRealStressVector_StressControl. More...
 
virtual void giveRealStressVector_1d (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 Default implementation relies on giveRealStressVector_StressControl. More...
 
virtual void giveRealStressVector_2dBeamLayer (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 Default implementation relies on giveRealStressVector_StressControl. More...
 
virtual void giveRealStressVector_PlateLayer (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 Default implementation relies on giveRealStressVector_StressControl. More...
 
virtual void giveThermalDilatationVector (FloatArray &answer, GaussPoint *gp, TimeStep *tStep)
 Returns a vector of coefficients of thermal dilatation in direction of each material principal (local) axis. More...
 
virtual int hasMaterialModeCapability (MaterialMode mode)
 Tests if material supports material mode. More...
 
virtual int hasCastingTimeSupport ()
 Tests if material supports casting time. More...
 
virtual int giveIPValue (FloatArray &answer, GaussPoint *gp, InternalStateType type, TimeStep *tStep)
 Returns the integration point corresponding value in Reduced form. More...
 
virtual contextIOResultType saveIPContext (DataStream &stream, ContextMode mode, GaussPoint *gp)
 Stores integration point state to output stream. More...
 
virtual contextIOResultType restoreIPContext (DataStream &stream, ContextMode mode, GaussPoint *gp)
 Reads integration point state to output stream. More...
 
virtual void give3dMaterialStiffnessMatrix (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)
 Computes full 3d material stiffness matrix at given integration point, time, respecting load history in integration point. More...
 
virtual void givePlaneStressStiffMtrx (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 Method for computing plane stress stiffness matrix of receiver. More...
 
virtual void givePlaneStrainStiffMtrx (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 Method for computing plane strain stiffness matrix of receiver. More...
 
virtual void give1dStressStiffMtrx (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 Method for computing 1d stiffness matrix of receiver. More...
 
virtual void give2dLatticeStiffMtrx (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 Method for computing 2d lattice stiffness matrix of receiver. More...
 
virtual void give3dLatticeStiffMtrx (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 Method for computing 3d lattice stiffness matrix of receiver. More...
 
virtual void computeStressIndependentStrainVector (FloatArray &answer, GaussPoint *gp, TimeStep *tStep, ValueModeType mode)
 Computes reduced strain vector in given integration point, generated by internal processes in material, which are independent on loading in particular integration point. More...
 
double giveAlphaOne () const
 
double giveAlphaTwo () const
 
virtual bool isActivated (TimeStep *tStep)
 
- Public Member Functions inherited from oofem::StructuralMaterial
 StructuralMaterial (int n, Domain *d)
 Constructor. More...
 
virtual ~StructuralMaterial ()
 Destructor. More...
 
virtual void giveInputRecord (DynamicInputRecord &input)
 Setups the input record string of receiver. More...
 
virtual void giveStiffnessMatrix (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)
 Computes the stiffness matrix for giveRealStressVector of receiver in given integration point, respecting its history. More...
 
virtual void giveRealStressVector_StressControl (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, const IntArray &strainControl, TimeStep *tStep)
 Iteratively calls giveRealStressVector_3d to find the stress controlled equal to zero¬∑ More...
 
virtual void giveRealStressVector_ShellStressControl (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, const IntArray &strainControl, TimeStep *tStep)
 
virtual void giveRealStressVector_Warping (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 Default implementation relies on giveRealStressVector_StressControl. More...
 
virtual void giveRealStressVector_Fiber (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 Default implementation relies on giveRealStressVector_StressControl. More...
 
virtual void giveRealStressVector_Lattice2d (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 
virtual void giveRealStressVector_Lattice3d (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 
virtual void giveRealStressVector_2dPlateSubSoil (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 Default implementation is not provided. More...
 
virtual void giveRealStressVector_3dBeamSubSoil (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedE, TimeStep *tStep)
 
virtual void giveEshelbyStressVector_PlaneStrain (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedF, TimeStep *tStep)
 Prototype for computation of Eshelby stress. More...
 
void give_dPdF_from (const FloatMatrix &dSdE, FloatMatrix &answer, GaussPoint *gp)
 
void convert_dSdE_2_dPdF (FloatMatrix &answer, const FloatMatrix &dSdE, const FloatArray &S, const FloatArray &F, MaterialMode matMode)
 
double giveReferenceTemperature ()
 Returns the reference temperature of receiver. More...
 
virtual void computeStressIndependentStrainVector_3d (FloatArray &answer, GaussPoint *gp, TimeStep *tStep, ValueModeType mode)
 
virtual void give3dMaterialStiffnessMatrix_dPdF (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)
 
virtual void give3dMaterialStiffnessMatrix_dCde (FloatMatrix &answer, MatResponseMode mode, GaussPoint *gp, TimeStep *tStep)
 
void giveStressDependentPartOfStrainVector (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedStrainVector, TimeStep *tStep, ValueModeType mode)
 Method for subtracting from reduced space strain vector its stress-independent parts (caused by temperature, shrinkage, creep and possibly by other phenomena). More...
 
void giveStressDependentPartOfStrainVector_3d (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedStrainVector, TimeStep *tStep, ValueModeType mode)
 
virtual int setIPValue (const FloatArray &value, GaussPoint *gp, InternalStateType type)
 Sets the value of a certain variable at a given integration point to the given value. More...
 
virtual void give2dBeamLayerStiffMtrx (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 Method for computing 2d beam layer stiffness matrix of receiver. More...
 
virtual void givePlateLayerStiffMtrx (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 Method for computing 2d plate layer stiffness matrix of receiver. More...
 
virtual void giveFiberStiffMtrx (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 Method for computing 1d fiber stiffness matrix of receiver. More...
 
virtual void give2dPlateSubSoilStiffMtrx (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 Method for computing stiffness matrix of plate subsoil model. More...
 
virtual void give3dBeamSubSoilStiffMtrx (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 Method for computing stiffness matrix of beam3d subsoil model. More...
 
virtual void giveFirstPKStressVector_3d (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedF, TimeStep *tStep)
 Default implementation relies on giveRealStressVector for second Piola-Kirchoff stress. More...
 
virtual void giveFirstPKStressVector_PlaneStrain (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedF, TimeStep *tStep)
 Default implementation relies on giveFirstPKStressVector_3d. More...
 
virtual void giveFirstPKStressVector_PlaneStress (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedF, TimeStep *tStep)
 Default implementation relies on giveFirstPKStressVector_3d. More...
 
virtual void giveFirstPKStressVector_1d (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedF, TimeStep *tStep)
 Default implementation relies on giveFirstPKStressVector_3d. More...
 
virtual void giveCauchyStressVector_3d (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedF, TimeStep *tStep)
 
virtual void giveCauchyStressVector_PlaneStrain (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedF, TimeStep *tStep)
 
virtual void giveCauchyStressVector_PlaneStress (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedF, TimeStep *tStep)
 
virtual void giveCauchyStressVector_1d (FloatArray &answer, GaussPoint *gp, const FloatArray &reducedF, TimeStep *tStep)
 
virtual void givePlaneStressStiffMtrx_dPdF (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 
virtual void givePlaneStressStiffMtrx_dCde (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 
virtual void givePlaneStrainStiffMtrx_dPdF (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 
virtual void givePlaneStrainStiffMtrx_dCde (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 
virtual void give1dStressStiffMtrx_dPdF (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 
virtual void give1dStressStiffMtrx_dCde (FloatMatrix &answer, MatResponseMode mmode, GaussPoint *gp, TimeStep *tStep)
 
- Public Member Functions inherited from oofem::Material
 Material (int n, Domain *d)
 Constructor. More...
 
virtual ~Material ()
 Destructor. More...
 
virtual bool isCharacteristicMtrxSymmetric (MatResponseMode rMode)
 Returns true if stiffness matrix of receiver is symmetric Default implementation returns true. More...
 
virtual double give (int aProperty, GaussPoint *gp)
 Returns the value of material property 'aProperty'. More...
 
virtual bool hasProperty (int aProperty, GaussPoint *gp)
 Returns true if 'aProperty' exists on material. More...
 
virtual void modifyProperty (int aProperty, double value, GaussPoint *gp)
 Modify 'aProperty', which already exists on material. More...
 
double giveCastingTime ()
 
virtual void printYourself ()
 Prints receiver state on stdout. Useful for debugging. More...
 
virtual int checkConsistency ()
 Allows programmer to test some internal data, before computation begins. More...
 
virtual int initMaterial (Element *element)
 Optional function to call specific procedures when initializing a material. More...
 
virtual MaterialStatusgiveStatus (GaussPoint *gp) const
 Returns material status of receiver in given integration point. More...
 
virtual int packUnknowns (DataStream &buff, TimeStep *tStep, GaussPoint *ip)
 Pack all necessary data of integration point (according to element parallel_mode) into given communication buffer. More...
 
virtual int unpackAndUpdateUnknowns (DataStream &buff, TimeStep *tStep, GaussPoint *ip)
 Unpack and updates all necessary data of given integration point (according to element parallel_mode) into given communication buffer. More...
 
virtual int estimatePackSize (DataStream &buff, GaussPoint *ip)
 Estimates the necessary pack size to hold all packed data of receiver. More...
 
virtual double predictRelativeComputationalCost (GaussPoint *gp)
 Returns the weight representing relative computational cost of receiver The reference material model is linear isotropic material - its weight is set to 1.0 The other material models should compare to this reference model. More...
 
virtual double predictRelativeRedistributionCost (GaussPoint *gp)
 Returns the relative redistribution cost of the receiver. More...
 
virtual void initTempStatus (GaussPoint *gp)
 Initializes temporary variables stored in integration point status at the beginning of new time step. More...
 
- Public Member Functions inherited from oofem::FEMComponent
 FEMComponent (int n, Domain *d)
 Regular constructor, creates component with given number and belonging to given domain. More...
 
virtual ~FEMComponent ()
 Virtual destructor. More...
 
DomaingiveDomain () const
 
virtual void setDomain (Domain *d)
 Sets associated Domain. More...
 
int giveNumber () const
 
void setNumber (int num)
 Sets number of receiver. More...
 
virtual void updateLocalNumbering (EntityRenumberingFunctor &f)
 Local renumbering support. More...
 
virtual contextIOResultType saveContext (DataStream &stream, ContextMode mode, void *obj=NULL)
 Stores receiver state to output stream. More...
 
virtual contextIOResultType restoreContext (DataStream &stream, ContextMode mode, void *obj=NULL)
 Restores the receiver state previously written in stream. More...
 
virtual void printOutputAt (FILE *file, TimeStep *tStep)
 Prints output of receiver to stream, for given time step. More...
 
virtual InterfacegiveInterface (InterfaceType t)
 Interface requesting service. More...
 
std::string errorInfo (const char *func) const
 Returns string for prepending output (used by error reporting macros). More...
 

Protected Types

enum  ec2ShrinkageType { EC2_NoShrinkage, EC2_TotalShrinkage, EC2_DryingShrinkage, EC2_AutogenousShrinkage }
 shrinkage option More...
 

Protected Member Functions

virtual int hasIncrementalShrinkageFormulation ()
 If only incremental shrinkage strain formulation is provided, then total shrinkage strain must be tracked in status in order to be able to compute total value. More...
 
virtual double giveEModulus (GaussPoint *gp, TimeStep *tStep)
 Evaluation of the incremental modulus. More...
 
virtual double computeEquivalentAge (GaussPoint *gp, TimeStep *tStep)
 implements B.9 More...
 
virtual double computeEquivalentMaturity (GaussPoint *gp, TimeStep *tStep)
 implements B.10 More...
 
void computeElasticityStrengthParams (int)
 sets parameters for elasticity and strength according to formulas from EC More...
 
void computeShrinkageParams (int, double)
 sets parameters for shrinkage according to formulas from EC More...
 
void computeCreepParams (int, double)
 sets parameters for creep according to formulas from EC More...
 
virtual void computeCharTimes ()
 computes retardation times of the aging Kelvin chain More...
 
double computeRetardationTimeCorrection (int mu)
 computes correction factor which multiplies the retardation times More...
 
double evaluateSpectrumAt (double tau)
 evaluates retardation spectrum at given time (t-t') More...
 
virtual void computeCharCoefficients (FloatArray &answer, double tPrime, GaussPoint *gp, TimeStep *tStep)
 Evaluation of characteristic moduli of the Kelvin chain. More...
 
void computeIncrementOfDryingShrinkageVector (FloatArray &answer, GaussPoint *gp, double tNow, double tThen)
 computes increment of drying shrinkage - the shrinkage strain is isotropic More...
 
void computeIncrementOfAutogenousShrinkageVector (FloatArray &answer, GaussPoint *gp, double tNow, double tThen)
 computes increment of autogenous shrinkage - the shrinkage strain is isotropic More...
 
- Protected Member Functions inherited from oofem::KelvinChainMaterial
LinearElasticMaterialgiveLinearElasticMaterial ()
 
- Protected Member Functions inherited from oofem::RheoChainMaterial
const FloatArraygiveDiscreteTimes ()
 
void computeDiscreteRelaxationFunction (FloatArray &answer, const FloatArray &tSteps, double t0, double tr, GaussPoint *gp, TimeStep *tSte)
 Evaluation of the relaxation function at given times. More...
 
void giveUnitComplianceMatrix (FloatMatrix &answer, GaussPoint *gp, TimeStep *tStep)
 Evaluation of elastic compliance matrix for unit Young's modulus. More...
 
void giveUnitStiffnessMatrix (FloatMatrix &answer, GaussPoint *gp, TimeStep *tStep)
 Evaluation of elastic stiffness matrix for unit Young's modulus. More...
 
virtual void updateEparModuli (double tPrime, GaussPoint *gp, TimeStep *tStep)
 Update of partial moduli of individual chain units. More...
 
double giveEparModulus (int iChain)
 Access to partial modulus of a given unit. More...
 
double giveCharTime (int) const
 Access to the characteristic time of a given unit. More...
 
virtual double giveCharTimeExponent (int i)
 Exponent to be used with the char time of a given unit, usually = 1.0. More...
 
LinearElasticMaterialgiveLinearElasticMaterial ()
 Access to the underlying linear elastic material with unit Young's modulus. More...
 
double giveEndOfTimeOfInterest ()
 Access to the time up to which the response should be accurate. More...
 
void computeTrueStressIndependentStrainVector (FloatArray &answer, GaussPoint *gp, TimeStep *tStep, ValueModeType mode)
 Computes, for the given integration point, the strain vector induced by stress-independent internal processes in the material. More...
 

Protected Attributes

double tau1
 fixed retardation time of the first unit More...
 
double EspringVal
 stiffness of the zeroth Kelvin unit More...
 
double fcm28
 mean compressive strength at 28 days default - to be specified in units of the analysis (e.g. 30.e6 + stiffnessFacotr 1. or 30. + stiffnessFactor 1.e6) More...
 
double Ecm28
 Young's modulus at 28 days default [MPa]. More...
 
double stiffnessFactor
 factor unifying stiffnesses (Ecm is predicted from fcm...) More...
 
double s
 parameter determined by cement type More...
 
double phi_RH
 drying creep coefficient More...
 
double beta_fcm
 drying creep coefficient More...
 
double beta_H
 drying creep coefficient More...
 
double h0
 effective thickness [mm] More...
 
double alpha_T_cement
 influence of cement type on concrete equivalent age, B.9 in EC2 More...
 
double t0
 duration of curing [day, sec, ...] More...
 
double begOfDrying
 age (absolute) when concrete started drying, must be in days! More...
 
double kh
 drying shrinkage coefficient More...
 
double eps_cd_0
 asymptotic value of drying shrinkage at zero relative humidity, B.11 in EC2 More...
 
double eps_ca_infty
 asymptotic value of autogenous shrinakge, 3.12 in EC2 More...
 
enum oofem::Eurocode2CreepMaterial::ec2ShrinkageType shType
 
bool retardationSpectrumApproximation
 If true, analysis of retardation spectrum is used for evaluation of Kelvin units moduli If false, least-squares method is used for evaluation of Kelvin units moduli (default) More...
 
bool temperatureDependent
 switch for temperature dependence of concrete maturity (default option is off) More...
 
- Protected Attributes inherited from oofem::RheoChainMaterial
double talpha
 thermal dilatation coeff. More...
 
int nUnits
 Number of (Maxwell or Kelvin) units in the rheologic chain. More...
 
double relMatAge
 Physical age of the material at simulation time = 0. More...
 
bool lattice
 
double nu
 Poisson's ratio (assumed to be constant, unaffected by creep). More...
 
double alphaOne
 Parameters for the lattice model. More...
 
double alphaTwo
 
double EparValTime
 Time for which the partial moduli of individual units have been evaluated. More...
 
double begOfTimeOfInterest
 Time from which the model should give a good approximation. Optional field. Default value is 0.1 [day]. More...
 
double endOfTimeOfInterest
 Time (age???) up to which the model should give a good approximation. More...
 
LinearElasticMateriallinearElasticMaterial
 Associated linearElasticMaterial, with E = 1. More...
 
FloatArray EparVal
 Partial moduli of individual units. More...
 
FloatArray charTimes
 Characteristic times of individual units (relaxation or retardation times). More...
 
FloatArray discreteTimeScale
 Times at which the errors are evaluated if the least-square method is used. More...
 
double timeFactor
 Scaling factor transforming the simulation time units into days (gives the number of simulation time units in one day, e.g. More...
 
int preCastingTimeMat
 Stiffness at time less than casting time - optional parameter, negative by default. More...
 
- Protected Attributes inherited from oofem::StructuralMaterial
double referenceTemperature
 Reference temperature (temperature, when material has been built into structure). More...
 
- Protected Attributes inherited from oofem::Material
Dictionary propertyDictionary
 Property dictionary. More...
 
double castingTime
 Casting time. More...
 
- Protected Attributes inherited from oofem::FEMComponent
int number
 Component number. More...
 
Domaindomain
 Link to domain object, useful for communicating with other FEM components. More...
 

Additional Inherited Members

- Static Public Member Functions inherited from oofem::StructuralMaterial
static int giveSymVI (int ind1, int ind2)
 
static int giveVI (int ind1, int ind2)
 
static int giveVoigtVectorMask (IntArray &answer, MaterialMode mmode)
 Returns a mask of the vector indicies corresponding to components in a general (non-symmetric) second order tensor of some stress/strain/deformation measure that performes work. More...
 
static int giveVoigtSymVectorMask (IntArray &answer, MaterialMode mmode)
 The same as giveVoigtVectorMask but returns a mask corresponding to a symmetric second order tensor. More...
 
static void giveInvertedVoigtVectorMask (IntArray &answer, MaterialMode mmode)
 Gives the inverted version of giveVoigtVectorMask. More...
 
static int giveSizeOfVoigtVector (MaterialMode mmode)
 Returns the size of reduced stress/strain vector according to given mode. More...
 
static int giveSizeOfVoigtSymVector (MaterialMode mmode)
 Returns the size of symmetric part of a reduced stress/strain vector according to given mode. More...
 
static void giveFullVectorForm (FloatArray &answer, const FloatArray &strainVector, MaterialMode matMode)
 Converts the reduced symmetric Voigt vector (2nd order tensor) to full form. More...
 
static void giveFullVectorFormF (FloatArray &answer, const FloatArray &strainVector, MaterialMode matMode)
 Converts the reduced deformation gradient Voigt vector (2nd order tensor). More...
 
static void giveFullSymVectorForm (FloatArray &answer, const FloatArray &vec, MaterialMode matMode)
 Converts the reduced unsymmetric Voigt vector (2nd order tensor) to full form. More...
 
static void giveReducedVectorForm (FloatArray &answer, const FloatArray &vec, MaterialMode matMode)
 Converts the full symmetric Voigt vector (2nd order tensor) to reduced form. More...
 
static void giveReducedSymVectorForm (FloatArray &answer, const FloatArray &vec, MaterialMode matMode)
 Converts the full unsymmetric Voigt vector (2nd order tensor) to reduced form. More...
 
static void giveFullSymMatrixForm (FloatMatrix &answer, const FloatMatrix &red, MaterialMode matMode)
 Converts the full unsymmetric Voigt matrix (4th order tensor) to reduced form. More...
 
static void giveReducedMatrixForm (FloatMatrix &answer, const FloatMatrix &full, MaterialMode matMode)
 Converts the full symmetric Voigt matrix (4th order tensor) to reduced form. More...
 
static void giveReducedSymMatrixForm (FloatMatrix &answer, const FloatMatrix &full, MaterialMode matMode)
 Converts the full unsymmetric Voigt matrix (4th order tensor) to reduced form. More...
 
static void transformStrainVectorTo (FloatArray &answer, const FloatMatrix &base, const FloatArray &strainVector, bool transpose=false)
 Transforms 3d strain vector into another coordinate system. More...
 
static void transformStressVectorTo (FloatArray &answer, const FloatMatrix &base, const FloatArray &stressVector, bool transpose=false)
 Transforms 3d stress vector into another coordinate system. More...
 
static double computeVonMisesStress (const FloatArray *currentStress)
 Computes equivalent of von Mises stress. More...
 
static void giveStrainVectorTranformationMtrx (FloatMatrix &answer, const FloatMatrix &base, bool transpose=false)
 Computes 3d strain vector transformation matrix from standard vector transformation matrix. More...
 
static void give2DStrainVectorTranformationMtrx (FloatMatrix &answer, const FloatMatrix &base, bool transpose=false)
 Computes 2d strain vector transformation matrix from standard vector transformation matrix. More...
 
static void giveStressVectorTranformationMtrx (FloatMatrix &answer, const FloatMatrix &base, bool transpose=false)
 Computes 3d stress vector transformation matrix from standard vector transformation matrix. More...
 
static void givePlaneStressVectorTranformationMtrx (FloatMatrix &answer, const FloatMatrix &base, bool transpose=false)
 Computes 2d stress vector transformation matrix from standard vector transformation matrix. More...
 
static void sortPrincDirAndValCloseTo (FloatArray *pVal, FloatMatrix *pDir, FloatMatrix *toPDir)
 Method for sorting newly computed principal values (pVal) and corresponding principal directions (pDir) to be closed to some (often previous) principal directions (toPDir). More...
 
static void computePrincipalValues (FloatArray &answer, const FloatArray &s, stressStrainPrincMode mode)
 Common functions for convenience. More...
 
static void computePrincipalValDir (FloatArray &answer, FloatMatrix &dir, const FloatArray &s, stressStrainPrincMode mode)
 Computes principal values and directions of stress or strain vector. More...
 
static double computeDeviatoricVolumetricSplit (FloatArray &dev, const FloatArray &s)
 Computes split of receiver into deviatoric and volumetric part. More...
 
static void computeDeviatoricVolumetricSum (FloatArray &s, const FloatArray &dev, double mean)
 
static void applyDeviatoricElasticCompliance (FloatArray &strain, const FloatArray &stress, double EModulus, double nu)
 
static void applyDeviatoricElasticCompliance (FloatArray &strain, const FloatArray &stress, double GModulus)
 
static void applyDeviatoricElasticStiffness (FloatArray &stress, const FloatArray &strain, double EModulus, double nu)
 
static void applyDeviatoricElasticStiffness (FloatArray &stress, const FloatArray &strain, double GModulus)
 
static void applyElasticStiffness (FloatArray &stress, const FloatArray &strain, double EModulus, double nu)
 
static void applyElasticCompliance (FloatArray &strain, const FloatArray &stress, double EModulus, double nu)
 
static double computeStressNorm (const FloatArray &stress)
 
static double computeFirstInvariant (const FloatArray &s)
 
static double computeSecondStressInvariant (const FloatArray &s)
 
static double computeThirdStressInvariant (const FloatArray &s)
 
static double computeFirstCoordinate (const FloatArray &s)
 
static double computeSecondCoordinate (const FloatArray &s)
 
static double computeThirdCoordinate (const FloatArray &s)
 
- Static Public Attributes inherited from oofem::StructuralMaterial
static std::vector< std::vector< int > > vIindex
 Voigt index map. More...
 
static std::vector< std::vector< int > > svIndex
 Symmetric Voigt index map. More...
 
- Static Protected Member Functions inherited from oofem::RheoChainMaterial
static void generateLogTimeScale (FloatArray &answer, double from, double to, int nsteps)
 Generates discrete times starting from time "from" to time "to" uniformly distributed in log time scale. More...
 

Detailed Description

This class implements a model for concrete creep and shrinkage according to EuroCode 2 The creep is assumed to be linear (formula from section 3.7 is not considered here) with aging.

The linearity assumption is considered OK for stresses below 0.45 of the compressive strength. The shrinkage deformation is additively split into two parts: drying shrinkage ${sh,d}$ and autogenous shrinkage ${sh,a}$. A detailed description of the material model is given in the material manual. See the tests "/sm/EC2creep.in" and "/sm/EC2shrinkage.in" for examples.

Definition at line 100 of file eurocode2creep.h.

Member Enumeration Documentation

shrinkage option

Enumerator
EC2_NoShrinkage 
EC2_TotalShrinkage 
EC2_DryingShrinkage 
EC2_AutogenousShrinkage 

Definition at line 161 of file eurocode2creep.h.

Constructor & Destructor Documentation

oofem::Eurocode2CreepMaterial::Eurocode2CreepMaterial ( int  n,
Domain d 
)
inline

Definition at line 174 of file eurocode2creep.h.

virtual oofem::Eurocode2CreepMaterial::~Eurocode2CreepMaterial ( )
inlinevirtual

Member Function Documentation

void oofem::Eurocode2CreepMaterial::computeCharCoefficients ( FloatArray answer,
double  tPrime,
GaussPoint gp,
TimeStep tStep 
)
protectedvirtual
double oofem::Eurocode2CreepMaterial::computeConcreteStrengthAtAge ( double  age)
virtual

evaluates concrete strength at given age

Definition at line 234 of file eurocode2creep.C.

References fcm28, s, and oofem::RheoChainMaterial::timeFactor.

Referenced by computeMeanElasticModulusAtAge().

double oofem::Eurocode2CreepMaterial::computeCreepCoefficient ( double  t,
double  t_prime,
GaussPoint gp,
TimeStep tStep 
)
virtual

Evaluation of the compliance function (according to appendix B from the EC)

Definition at line 273 of file eurocode2creep.C.

References beta_fcm, beta_H, computeEquivalentAge(), phi_RH, temperatureDependent, and oofem::RheoChainMaterial::timeFactor.

Referenced by computeCreepFunction().

double oofem::Eurocode2CreepMaterial::computeCreepFunction ( double  t,
double  t_prime,
GaussPoint gp,
TimeStep tStep 
)
virtual

Evaluation of the compliance function.

Implements oofem::RheoChainMaterial.

Definition at line 254 of file eurocode2creep.C.

References computeCreepCoefficient(), computeMeanElasticModulusAtAge(), and Ecm28.

void oofem::Eurocode2CreepMaterial::computeCreepParams ( int  cemType,
double  henv 
)
protected

sets parameters for creep according to formulas from EC

Definition at line 176 of file eurocode2creep.C.

References alpha_T_cement, beta_fcm, beta_H, fcm28, h0, oofem::min(), OOFEM_ERROR, phi_RH, and stiffnessFactor.

Referenced by initializeFrom().

void oofem::Eurocode2CreepMaterial::computeElasticityStrengthParams ( int  cemType)
protected

sets parameters for elasticity and strength according to formulas from EC

Definition at line 105 of file eurocode2creep.C.

References Ecm28, fcm28, OOFEM_ERROR, s, and stiffnessFactor.

Referenced by initializeFrom().

double oofem::Eurocode2CreepMaterial::computeEquivalentAge ( GaussPoint gp,
TimeStep tStep 
)
protectedvirtual

implements B.9

Definition at line 345 of file eurocode2creep.C.

References alpha_T_cement, computeEquivalentMaturity(), and oofem::max().

Referenced by computeCharCoefficients(), and computeCreepCoefficient().

void oofem::Eurocode2CreepMaterial::computeIncrementOfAutogenousShrinkageVector ( FloatArray answer,
GaussPoint gp,
double  tNow,
double  tThen 
)
protected

computes increment of autogenous shrinkage - the shrinkage strain is isotropic

Definition at line 668 of file eurocode2creep.C.

References oofem::FloatArray::at(), eps_ca_infty, oofem::GaussPoint::giveMaterialMode(), oofem::StructuralMaterial::giveReducedSymVectorForm(), oofem::FloatArray::resize(), and oofem::FloatArray::zero().

Referenced by giveShrinkageStrainVector().

void oofem::Eurocode2CreepMaterial::computeIncrementOfDryingShrinkageVector ( FloatArray answer,
GaussPoint gp,
double  tNow,
double  tThen 
)
protected

computes increment of drying shrinkage - the shrinkage strain is isotropic

Definition at line 634 of file eurocode2creep.C.

References oofem::FloatArray::at(), eps_cd_0, oofem::GaussPoint::giveMaterialMode(), oofem::StructuralMaterial::giveReducedSymVectorForm(), h0, kh, oofem::FloatArray::resize(), and oofem::FloatArray::zero().

Referenced by giveShrinkageStrainVector().

double oofem::Eurocode2CreepMaterial::computeMeanElasticModulusAtAge ( double  age)
virtual

evaluates concrete mean elastic modulus at given age

Definition at line 242 of file eurocode2creep.C.

References computeConcreteStrengthAtAge(), Ecm28, and fcm28.

Referenced by computeCreepFunction(), and giveEModulus().

double oofem::Eurocode2CreepMaterial::computeRetardationTimeCorrection ( int  mu)
protected

computes correction factor which multiplies the retardation times

Definition at line 476 of file eurocode2creep.C.

References beta_H, tau1, and oofem::RheoChainMaterial::timeFactor.

Referenced by computeCharTimes().

void oofem::Eurocode2CreepMaterial::computeShrinkageParams ( int  cemType,
double  henv 
)
protected

sets parameters for shrinkage according to formulas from EC

Definition at line 125 of file eurocode2creep.C.

References EC2_AutogenousShrinkage, EC2_DryingShrinkage, EC2_TotalShrinkage, eps_ca_infty, eps_cd_0, fcm28, h0, kh, oofem::max(), OOFEM_ERROR, shType, and stiffnessFactor.

Referenced by initializeFrom().

MaterialStatus * oofem::Eurocode2CreepMaterial::CreateStatus ( GaussPoint gp) const
virtual

Creates new copy of associated status and inserts it into given integration point.

Parameters
gpIntegration point where newly created status will be stored.
Returns
Reference to new status.

Reimplemented from oofem::KelvinChainMaterial.

Definition at line 703 of file eurocode2creep.C.

References oofem::FEMComponent::giveDomain(), and oofem::RheoChainMaterial::nUnits.

double oofem::Eurocode2CreepMaterial::evaluateSpectrumAt ( double  tau)
protected

evaluates retardation spectrum at given time (t-t')

Definition at line 486 of file eurocode2creep.C.

References beta_H, and oofem::RheoChainMaterial::timeFactor.

Referenced by computeCharCoefficients().

virtual const char* oofem::Eurocode2CreepMaterial::giveClassName ( ) const
inlinevirtual
Returns
Class name of the receiver.

Reimplemented from oofem::KelvinChainMaterial.

Definition at line 184 of file eurocode2creep.h.

virtual const char* oofem::Eurocode2CreepMaterial::giveInputRecordName ( ) const
inlinevirtual
Returns
Input record name of the receiver.

Implements oofem::FEMComponent.

Definition at line 185 of file eurocode2creep.h.

References _IFT_Eurocode2CreepMaterial_Name, and oofem::MaterialStatus::initializeFrom().

void oofem::Eurocode2CreepMaterial::giveRealStressVector ( FloatArray answer,
GaussPoint gp,
const FloatArray reducedStrain,
TimeStep tStep 
)
virtual

Computes the real stress vector for given total strain and integration point.

The total strain is defined as strain computed directly from displacement field at given time. The stress independent parts (temperature, eigenstrains) are subtracted in constitutive driver. The service should use previously reached equilibrium history variables. Also it should update temporary history variables in status according to newly reached state. The temporary history variables are moved into equilibrium ones after global structure equilibrium has been reached by iteration process.

Parameters
answerStress vector in reduced form. For large deformations it is treated as the second Piola-Kirchoff stress.
gpIntegration point.
reducedStrainStrain vector in reduced form. For large deformations it is treated as the Green-Lagrange strain.
tStepCurrent time step (most models are able to respond only when tStep is current time step).
Todo:
Move this to StructuralCrossSection ?

Reimplemented from oofem::KelvinChainMaterial.

Definition at line 710 of file eurocode2creep.C.

References oofem::KelvinChainMaterial::giveRealStressVector(), and oofem::RheoChainMaterial::isActivated().

void oofem::Eurocode2CreepMaterial::giveShrinkageStrainVector ( FloatArray answer,
GaussPoint gp,
TimeStep tStep,
ValueModeType  mode 
)
virtual
virtual int oofem::Eurocode2CreepMaterial::hasIncrementalShrinkageFormulation ( )
inlineprotectedvirtual

If only incremental shrinkage strain formulation is provided, then total shrinkage strain must be tracked in status in order to be able to compute total value.

Reimplemented from oofem::KelvinChainMaterial.

Definition at line 205 of file eurocode2creep.h.

IRResultType oofem::Eurocode2CreepMaterial::initializeFrom ( InputRecord ir)
virtual

Initializes receiver according to object description stored in input record.

This function is called immediately after creating object using constructor. Input record can be imagined as data record in component database belonging to receiver. Receiver may use value-name extracting functions to extract particular field from record.

See also
IR_GIVE_FIELD
IR_GIVE_OPTIONAL_FIELD
Parameters
irInput record to initialize from.
Returns
IRResultType

Reimplemented from oofem::KelvinChainMaterial.

Definition at line 48 of file eurocode2creep.C.

References _IFT_Eurocode2CreepMaterial_cemType, _IFT_Eurocode2CreepMaterial_fcm28, _IFT_Eurocode2CreepMaterial_h0, _IFT_Eurocode2CreepMaterial_henv, _IFT_Eurocode2CreepMaterial_shType, _IFT_Eurocode2CreepMaterial_spectrum, _IFT_Eurocode2CreepMaterial_stiffnessFactor, _IFT_Eurocode2CreepMaterial_t0, _IFT_Eurocode2CreepMaterial_temperatureDependent, computeCreepParams(), computeElasticityStrengthParams(), computeShrinkageParams(), fcm28, h0, oofem::InputRecord::hasField(), oofem::KelvinChainMaterial::initializeFrom(), IR_GIVE_FIELD, IR_GIVE_OPTIONAL_FIELD, oofem::IRRT_OK, OOFEM_ERROR, retardationSpectrumApproximation, shType, stiffnessFactor, t0, and temperatureDependent.

Member Data Documentation

double oofem::Eurocode2CreepMaterial::alpha_T_cement
protected

influence of cement type on concrete equivalent age, B.9 in EC2

Definition at line 139 of file eurocode2creep.h.

Referenced by computeCreepParams(), and computeEquivalentAge().

double oofem::Eurocode2CreepMaterial::begOfDrying
protected

age (absolute) when concrete started drying, must be in days!

Definition at line 147 of file eurocode2creep.h.

double oofem::Eurocode2CreepMaterial::beta_fcm
protected

drying creep coefficient

Definition at line 130 of file eurocode2creep.h.

Referenced by computeCharCoefficients(), computeCreepCoefficient(), and computeCreepParams().

double oofem::Eurocode2CreepMaterial::beta_H
protected

drying creep coefficient

Definition at line 133 of file eurocode2creep.h.

Referenced by computeCreepCoefficient(), computeCreepParams(), computeRetardationTimeCorrection(), and evaluateSpectrumAt().

double oofem::Eurocode2CreepMaterial::Ecm28
protected

Young's modulus at 28 days default [MPa].

Definition at line 117 of file eurocode2creep.h.

Referenced by computeCharCoefficients(), computeCreepFunction(), computeElasticityStrengthParams(), and computeMeanElasticModulusAtAge().

double oofem::Eurocode2CreepMaterial::eps_ca_infty
protected

asymptotic value of autogenous shrinakge, 3.12 in EC2

Definition at line 158 of file eurocode2creep.h.

Referenced by computeIncrementOfAutogenousShrinkageVector(), and computeShrinkageParams().

double oofem::Eurocode2CreepMaterial::eps_cd_0
protected

asymptotic value of drying shrinkage at zero relative humidity, B.11 in EC2

Definition at line 153 of file eurocode2creep.h.

Referenced by computeIncrementOfDryingShrinkageVector(), and computeShrinkageParams().

double oofem::Eurocode2CreepMaterial::EspringVal
protected

stiffness of the zeroth Kelvin unit

Definition at line 110 of file eurocode2creep.h.

Referenced by computeCharCoefficients(), and giveEModulus().

double oofem::Eurocode2CreepMaterial::fcm28
protected

mean compressive strength at 28 days default - to be specified in units of the analysis (e.g. 30.e6 + stiffnessFacotr 1. or 30. + stiffnessFactor 1.e6)

Definition at line 114 of file eurocode2creep.h.

Referenced by computeConcreteStrengthAtAge(), computeCreepParams(), computeElasticityStrengthParams(), computeMeanElasticModulusAtAge(), computeShrinkageParams(), and initializeFrom().

double oofem::Eurocode2CreepMaterial::h0
protected

effective thickness [mm]

Definition at line 136 of file eurocode2creep.h.

Referenced by computeCreepParams(), computeIncrementOfDryingShrinkageVector(), computeShrinkageParams(), and initializeFrom().

double oofem::Eurocode2CreepMaterial::kh
protected

drying shrinkage coefficient

Definition at line 150 of file eurocode2creep.h.

Referenced by computeIncrementOfDryingShrinkageVector(), and computeShrinkageParams().

double oofem::Eurocode2CreepMaterial::phi_RH
protected

drying creep coefficient

Definition at line 127 of file eurocode2creep.h.

Referenced by computeCharCoefficients(), computeCreepCoefficient(), and computeCreepParams().

bool oofem::Eurocode2CreepMaterial::retardationSpectrumApproximation
protected

If true, analysis of retardation spectrum is used for evaluation of Kelvin units moduli If false, least-squares method is used for evaluation of Kelvin units moduli (default)

Definition at line 167 of file eurocode2creep.h.

Referenced by computeCharCoefficients(), computeCharTimes(), giveEModulus(), and initializeFrom().

double oofem::Eurocode2CreepMaterial::s
protected

parameter determined by cement type

Definition at line 123 of file eurocode2creep.h.

Referenced by computeConcreteStrengthAtAge(), and computeElasticityStrengthParams().

enum oofem::Eurocode2CreepMaterial::ec2ShrinkageType oofem::Eurocode2CreepMaterial::shType
protected
double oofem::Eurocode2CreepMaterial::stiffnessFactor
protected

factor unifying stiffnesses (Ecm is predicted from fcm...)

Definition at line 120 of file eurocode2creep.h.

Referenced by computeCreepParams(), computeElasticityStrengthParams(), computeShrinkageParams(), and initializeFrom().

double oofem::Eurocode2CreepMaterial::t0
protected

duration of curing [day, sec, ...]

Definition at line 144 of file eurocode2creep.h.

Referenced by giveShrinkageStrainVector(), and initializeFrom().

double oofem::Eurocode2CreepMaterial::tau1
protected

fixed retardation time of the first unit

Definition at line 107 of file eurocode2creep.h.

Referenced by computeCharCoefficients(), computeCharTimes(), and computeRetardationTimeCorrection().

bool oofem::Eurocode2CreepMaterial::temperatureDependent
protected

switch for temperature dependence of concrete maturity (default option is off)

Definition at line 170 of file eurocode2creep.h.

Referenced by computeCharCoefficients(), computeCreepCoefficient(), and initializeFrom().


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

This page is part of the OOFEM documentation. Copyright (c) 2011 Borek Patzak
Project e-mail: info@oofem.org
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