chrono::fea::ChContinuumPlasticVonMises Class Reference

Description

Class for the basic properties of materials in an elastoplastic continuum, with strain yield limit based on Von Mises yield.

#include <ChContinuumMaterial.h>

Inheritance diagram for chrono::fea::ChContinuumPlasticVonMises:
Collaboration diagram for chrono::fea::ChContinuumPlasticVonMises:

Public Member Functions

 ChContinuumPlasticVonMises (double young=10000000, double poisson=0.4, double density=1000, double elastic_yield=0.1, double plastic_yield=0.2)
 Create a continuum isotropic elastoplastic material, where you can define also plastic and elastic max. More...
 
 ChContinuumPlasticVonMises (const ChContinuumPlasticVonMises &other)
 
void SetElasticYield (double elastic_yield)
 Set the elastic yield modulus as the maximum VonMises equivalent strain that can be withstood by material before starting plastic flow. More...
 
double GetElasticYield () const
 Get the elastic yield modulus.
 
void SetPlasticYield (double plastic_yield)
 Set the plastic yield modulus as the maximum VonMises equivalent strain that can be withstood by material before fracture. More...
 
double GetPlasticYield () const
 Get the plastic yield modulus.
 
virtual void SetPlasticFlowRate (double flow_rate) override
 Set the plastic flow rate. More...
 
virtual double GetPlasticFlowRate () const override
 Set the plastic flow rate.
 
virtual double ComputeYieldFunction (const ChStressTensor<> &stress) const override
 Return a scalar value that is 0 on the yield surface, <0 inside (elastic), >0 outside (incompatible->plastic flow)
 
virtual void ComputeReturnMapping (ChStrainTensor<> &plasticstrainflow, const ChStrainTensor<> &incrementstrain, const ChStrainTensor<> &lastelasticstrain, const ChStrainTensor<> &lastplasticstrain) const override
 Correct the strain-stress by enforcing that elastic stress must remain on the yield surface, computing a plastic flow to be added to plastic strain while integrating.
 
virtual void ComputePlasticStrainFlow (ChStrainTensor<> &plasticstrainflow, const ChStrainTensor<> &totstrain) const override
 Compute plastic strain flow (flow derivative dE_plast/dt) from strain, according to VonMises strain yield theory.
 
virtual void ArchiveOut (ChArchiveOut &archive_out) override
 
virtual void ArchiveIn (ChArchiveIn &archive_in) override
 
- Public Member Functions inherited from chrono::fea::ChContinuumElastoplastic
 ChContinuumElastoplastic (double young=10000000, double poisson=0.4, double density=1000)
 
- Public Member Functions inherited from chrono::fea::ChContinuumElastic
 ChContinuumElastic (double young=10000000, double poisson=0.4, double density=1000)
 
 ChContinuumElastic (const ChContinuumElastic &other)
 
void SetYoungModulus (double E)
 Set the Young elastic modulus, in Pa (N/m^2), as the ratio of the uniaxial stress over the uniaxial strain, for hookean materials.
 
double GetYoungModulus () const
 Get the Young elastic modulus, in Pa (N/m^2).
 
void SetPoissonRatio (double v)
 Set the Poisson ratio, as v=-transverse_strain/axial_strain, so takes into account the 'squeezing' effect of materials that are pulled. More...
 
double GetPoissonRatio () const
 Get the Poisson ratio, as v=-transverse_strain/axial_strain.
 
void SetShearModulus (double G)
 Set the shear modulus G, in Pa (N/m^2). More...
 
double GetShearModulus () const
 Get the shear modulus G, in Pa (N/m^2)
 
double GetLameFirstParam () const
 Get Lamé first parameter (the second is shear modulus, so GetShearModulus() )
 
double GetBulkModulus () const
 Get bulk modulus (increase of pressure for decrease of volume), in Pa.
 
double GetPWaveModulus () const
 Get P-wave modulus (if V=speed of propagation of a P-wave, then (M/density)=V^2 )
 
void ComputeStressStrainMatrix ()
 Computes Elasticity matrix and stores the value in this->StressStrainMatrix Note: is performed every time you change a material parameter.
 
ChMatrixDynamicGetStressStrainMatrix ()
 Get the Elasticity matrix.
 
void ComputeElasticStress (ChStressTensor<> &stress, const ChStrainTensor<> &strain) const
 Compute elastic stress from elastic strain (using column tensors, in Voight notation)
 
void ComputeElasticStrain (ChStrainTensor<> &strain, const ChStressTensor<> &stress) const
 Compute elastic strain from elastic stress (using column tensors, in Voight notation)
 
void SetRayleighDampingAlpha (double alpha)
 Set the Rayleigh mass-proportional damping factor alpha, to build damping R as R=alpha*M + beta*K.
 
double GetRayleighDampingAlpha () const
 Set the Rayleigh mass-proportional damping factor alpha, in R=alpha*M + beta*K.
 
void SetRayleighDampingBeta (double beta)
 Set the Rayleigh stiffness-proportional damping factor beta, to build damping R as R=alpha*M + beta*K.
 
double GetRayleighDampingBeta () const
 Set the Rayleigh stiffness-proportional damping factor beta, in R=alpha*M + beta*K.
 
- Public Member Functions inherited from chrono::fea::ChContinuumMaterial
 ChContinuumMaterial (double density=1000)
 
 ChContinuumMaterial (const ChContinuumMaterial &other)
 
void SetDensity (double density)
 Set the density of the material, in kg/m^2.
 
double GetDensity () const
 Get the density of the material, in kg/m^2.
 

Additional Inherited Members

- Protected Attributes inherited from chrono::fea::ChContinuumMaterial
double m_density
 

Constructor & Destructor Documentation

◆ ChContinuumPlasticVonMises()

chrono::fea::ChContinuumPlasticVonMises::ChContinuumPlasticVonMises ( double  young = 10000000,
double  poisson = 0.4,
double  density = 1000,
double  elastic_yield = 0.1,
double  plastic_yield = 0.2 
)

Create a continuum isotropic elastoplastic material, where you can define also plastic and elastic max.

stress (yield limits for transition elastic->plastic and plastic->fracture).

Member Function Documentation

◆ SetElasticYield()

void chrono::fea::ChContinuumPlasticVonMises::SetElasticYield ( double  elastic_yield)
inline

Set the elastic yield modulus as the maximum VonMises equivalent strain that can be withstood by material before starting plastic flow.

It defines the transition elastic->plastic.

◆ SetPlasticFlowRate()

virtual void chrono::fea::ChContinuumPlasticVonMises::SetPlasticFlowRate ( double  flow_rate)
inlineoverridevirtual

Set the plastic flow rate.

The lower the value, the slower the plastic flow during dynamic simulations.

Implements chrono::fea::ChContinuumElastoplastic.

◆ SetPlasticYield()

void chrono::fea::ChContinuumPlasticVonMises::SetPlasticYield ( double  plastic_yield)
inline

Set the plastic yield modulus as the maximum VonMises equivalent strain that can be withstood by material before fracture.

It defines the transition plastic->fracture.


The documentation for this class was generated from the following files:
  • /builds/uwsbel/chrono/src/chrono/fea/ChContinuumMaterial.h
  • /builds/uwsbel/chrono/src/chrono/fea/ChContinuumMaterial.cpp