#include <elastic_membrane_base.h>

Inheritance diagram for GRINS::ElasticMembraneBase< StressStrainLaw >:

Collaboration diagram for GRINS::ElasticMembraneBase< StressStrainLaw >:

Public Member Functions
	ElasticMembraneBase (const GRINS::PhysicsName &physics_name, const GetPot &input, bool is_compressible)

virtual	~ElasticMembraneBase ()

virtual void	init_variables (libMesh::FEMSystem *system)
	Initialize variables for this physics. More...

Public Member Functions inherited from GRINS::ElasticMembraneAbstract
	ElasticMembraneAbstract (const GRINS::PhysicsName &physics_name, const GetPot &input)

virtual	~ElasticMembraneAbstract ()

virtual void	init_context (AssemblyContext &context)
	Initialize context for added physics variables. More...

Public Member Functions inherited from GRINS::SolidMechanicsAbstract
	SolidMechanicsAbstract (const GRINS::PhysicsName &physics_name, const GetPot &input)

virtual	~SolidMechanicsAbstract ()

virtual void	set_time_evolving_vars (libMesh::FEMSystem *system)
	Set which variables are time evolving. More...

Public Member Functions inherited from GRINS::Physics
	Physics (const GRINS::PhysicsName &physics_name, const GetPot &input)

virtual	~Physics ()

virtual bool	enabled_on_elem (const libMesh::Elem *elem)
	Find if current physics is active on supplied element. More...

void	set_is_steady (bool is_steady)
	Sets whether this physics is to be solved with a steady solver or not. More...

bool	is_steady () const
	Returns whether or not this physics is being solved with a steady solver. More...

virtual void	auxiliary_init (MultiphysicsSystem &system)
	Any auxillary initialization a Physics class may need. More...

virtual void	register_postprocessing_vars (const GetPot &input, PostProcessedQuantities< libMesh::Real > &postprocessing)
	Register name of postprocessed quantity with PostProcessedQuantities. More...

virtual void	preassembly (MultiphysicsSystem &)
	Perform any necessary setup before element assembly begins. More...

virtual void	reinit (MultiphysicsSystem &)
	Any reinitialization that needs to be done. More...

virtual void	element_time_derivative (bool, AssemblyContext &)
	Time dependent part(s) of physics for element interiors. More...

virtual void	side_time_derivative (bool, AssemblyContext &)
	Time dependent part(s) of physics for boundaries of elements on the domain boundary. More...

virtual void	nonlocal_time_derivative (bool, AssemblyContext &)
	Time dependent part(s) of physics for scalar variables. More...

virtual void	element_constraint (bool, AssemblyContext &)
	Constraint part(s) of physics for element interiors. More...

virtual void	side_constraint (bool, AssemblyContext &)
	Constraint part(s) of physics for boundaries of elements on the domain boundary. More...

virtual void	nonlocal_constraint (bool, AssemblyContext &)
	Constraint part(s) of physics for scalar variables. More...

virtual void	damping_residual (bool, AssemblyContext &)
	Damping matrix part(s) for element interiors. All boundary terms lie within the time_derivative part. More...

virtual void	mass_residual (bool, AssemblyContext &)
	Mass matrix part(s) for element interiors. All boundary terms lie within the time_derivative part. More...

virtual void	nonlocal_mass_residual (bool, AssemblyContext &)
	Mass matrix part(s) for scalar variables. More...

void	init_ics (libMesh::FEMSystem *system, libMesh::CompositeFunction< libMesh::Number > &all_ics)

virtual void	compute_element_time_derivative_cache (AssemblyContext &)

virtual void	compute_side_time_derivative_cache (AssemblyContext &)

virtual void	compute_nonlocal_time_derivative_cache (AssemblyContext &)

virtual void	compute_element_constraint_cache (AssemblyContext &)

virtual void	compute_side_constraint_cache (AssemblyContext &)

virtual void	compute_nonlocal_constraint_cache (AssemblyContext &)

virtual void	compute_damping_residual_cache (AssemblyContext &)

virtual void	compute_mass_residual_cache (AssemblyContext &)

virtual void	compute_nonlocal_mass_residual_cache (AssemblyContext &)

virtual void	compute_postprocessed_quantity (unsigned int quantity_index, const AssemblyContext &context, const libMesh::Point &point, libMesh::Real &value)

ICHandlingBase *	get_ic_handler ()

Public Member Functions inherited from GRINS::ParameterUser
	ParameterUser (const std::string &user_name)

virtual	~ParameterUser ()

virtual void	set_parameter (libMesh::Number &param_variable, const GetPot &input, const std::string &param_name, libMesh::Number param_default)
	Each subclass can simultaneously read a parameter value from. More...

virtual void	set_parameter (libMesh::ParsedFunction< libMesh::Number, libMesh::Gradient > &func, const GetPot &input, const std::string &func_param_name, const std::string &param_default)
	Each subclass can simultaneously read a parsed function from. More...

virtual void	set_parameter (libMesh::ParsedFEMFunction< libMesh::Number > &func, const GetPot &input, const std::string &func_param_name, const std::string &param_default)
	Each subclass can simultaneously read a parsed function from. More...

virtual void	move_parameter (const libMesh::Number &old_parameter, libMesh::Number &new_parameter)
	When cloning an object, we need to update parameter pointers. More...

virtual void	move_parameter (const libMesh::ParsedFunction< libMesh::Number, libMesh::Gradient > &old_func, libMesh::ParsedFunction< libMesh::Number, libMesh::Gradient > &new_func)
	When cloning an object, we need to update parameter pointers. More...

virtual void	move_parameter (const libMesh::ParsedFEMFunction< libMesh::Number > &old_func, libMesh::ParsedFEMFunction< libMesh::Number > &new_func)
	When cloning an object, we need to update parameter pointers. More...

virtual void	register_parameter (const std::string &param_name, libMesh::ParameterMultiAccessor< libMesh::Number > &param_pointer) const
	Each subclass will register its copy of an independent. More...

Protected Member Functions
void	mass_residual_impl (bool compute_jacobian, AssemblyContext &context, InteriorFuncType interior_solution, VarDerivType get_solution_deriv, libMesh::Real mu=1.0)
	Implementation of mass_residual. More...

void	compute_metric_tensors (unsigned int qp, const libMesh::FEBase &elem, const AssemblyContext &context, const libMesh::Gradient &grad_u, const libMesh::Gradient &grad_v, const libMesh::Gradient &grad_w, libMesh::TensorValue< libMesh::Real > &a_cov, libMesh::TensorValue< libMesh::Real > &a_contra, libMesh::TensorValue< libMesh::Real > &A_cov, libMesh::TensorValue< libMesh::Real > &A_contra, libMesh::Real &lambda_sq)

Protected Member Functions inherited from GRINS::ElasticMembraneAbstract
const libMesh::FEGenericBase< libMesh::Real > *	get_fe (const AssemblyContext &context)

Protected Member Functions inherited from GRINS::Physics
libMesh::UniquePtr< libMesh::FEGenericBase< libMesh::Real > >	build_new_fe (const libMesh::Elem elem, const libMesh::FEGenericBase< libMesh::Real > fe, const libMesh::Point p)

void	parse_enabled_subdomains (const GetPot &input, const std::string &physics_name)

void	check_var_subdomain_consistency (const FEVariablesBase &var) const
	Check that var is enabled on at least the subdomains this Physics is. More...

Protected Attributes
StressStrainLaw	_stress_strain_law

bool	_is_compressible

libMesh::Real	_h0
	Membrane thickness. More...

libMesh::Real	_rho
	Membrane density. More...

VariableIndex	_lambda_sq_var
	Variable index for lambda_sq variable. More...

Protected Attributes inherited from GRINS::SolidMechanicsAbstract
DisplacementVariable &	_disp_vars

Protected Attributes inherited from GRINS::Physics
const PhysicsName	_physics_name
	Name of the physics object. Used for reading physics specific inputs. More...

GRINS::ICHandlingBase *	_ic_handler

std::set< libMesh::subdomain_id_type >	_enabled_subdomains
	Subdomains on which the current Physics class is enabled. More...

Private Member Functions
	ElasticMembraneBase ()

Additional Inherited Members
Static Public Member Functions inherited from GRINS::Physics
static void	set_is_axisymmetric (bool is_axisymmetric)
	Set whether we should treat the problem as axisymmetric. More...

static bool	is_axisymmetric ()

Static Public Attributes inherited from GRINS::ParameterUser
static std::string	zero_vector_function = std::string("{0}")
	A parseable function string with LIBMESH_DIM components, all 0. More...

Protected Types inherited from GRINS::SolidMechanicsAbstract
typedef const libMesh::DenseSubVector< libMesh::Number > &(libMesh::DiffContext::*	VarFuncType) (unsigned int) const

typedef void(libMesh::FEMContext::*	InteriorFuncType) (unsigned int, unsigned int, libMesh::Real &) const

typedef libMesh::Real(libMesh::DiffContext::*	VarDerivType) () const

Static Protected Attributes inherited from GRINS::Physics
static bool	_is_steady = false
	Caches whether or not the solver that's being used is steady or not. More...

static bool	_is_axisymmetric = false
	Caches whether we are solving an axisymmetric problem or not. More...

Detailed Description

template<typename StressStrainLaw>
class GRINS::ElasticMembraneBase< StressStrainLaw >

Definition at line 34 of file elastic_membrane_base.h.

Constructor & Destructor Documentation

template<typename StressStrainLaw >

GRINS::ElasticMembraneBase< StressStrainLaw >::ElasticMembraneBase	(	const GRINS::PhysicsName &	physics_name,
		const GetPot &	input,
		bool	is_compressible
	)

Definition at line 40 of file elastic_membrane_base.C.

References GRINS::SolidMechanicsAbstract::_disp_vars, GRINS::ElasticMembraneBase< StressStrainLaw >::_h0, GRINS::ElasticMembraneBase< StressStrainLaw >::_rho, GRINS::MultcomponentVectorVariable::dim(), GRINS::PhysicsNaming::elastic_membrane(), GRINS::MaterialsParsing::read_density(), and GRINS::MaterialsParsing::read_property().

     : ElasticMembraneAbstract(physics_name,input),
       _stress_strain_law(input,MaterialsParsing::material_name(input,PhysicsNaming::elastic_membrane())),
       _is_compressible(is_compressible),
       _h0(0.0)
   {
     MaterialsParsing::read_property( input,
                                      "Physics/"+physics_name+"/h0",
                                      "MembraneThickness",
                                      PhysicsNaming::elastic_membrane(),
                                      (*this),
                                      _h0 );
 
     MaterialsParsing::read_density( physics_name,
                                     input,
                                     (*this),
                                     _rho );
 
     if( this->_disp_vars.dim() < 2 )
       libmesh_error_msg("ERROR: ElasticMembraneBase subclasses only valid for two or three dimensions! Make sure you have at least two components in your Displacement type variable.");
   }

template<typename StressStrainLaw >

virtual GRINS::ElasticMembraneBase< StressStrainLaw >::~ElasticMembraneBase ( )

inlinevirtual

Definition at line 42 of file elastic_membrane_base.h.

42 {};

template<typename StressStrainLaw >

GRINS::ElasticMembraneBase< StressStrainLaw >::ElasticMembraneBase ( )

private

Member Function Documentation

template<typename StressStrainLaw >

void GRINS::ElasticMembraneBase< StressStrainLaw >::compute_metric_tensors	(	unsigned int	qp,
		const libMesh::FEBase &	elem,
		const AssemblyContext &	context,
		const libMesh::Gradient &	grad_u,
		const libMesh::Gradient &	grad_v,
		const libMesh::Gradient &	grad_w,
		libMesh::TensorValue< libMesh::Real > &	a_cov,
		libMesh::TensorValue< libMesh::Real > &	a_contra,
		libMesh::TensorValue< libMesh::Real > &	A_cov,
		libMesh::TensorValue< libMesh::Real > &	A_contra,
		libMesh::Real &	lambda_sq
	)

protected

Definition at line 150 of file elastic_membrane_base.C.

   {
     const std::vector<libMesh::RealGradient>& dxdxi  = elem.get_dxyzdxi();
     const std::vector<libMesh::RealGradient>& dxdeta = elem.get_dxyzdeta();
 
     const std::vector<libMesh::Real>& dxidx  = elem.get_dxidx();
     const std::vector<libMesh::Real>& dxidy  = elem.get_dxidy();
     const std::vector<libMesh::Real>& dxidz  = elem.get_dxidz();
 
     const std::vector<libMesh::Real>& detadx  = elem.get_detadx();
     const std::vector<libMesh::Real>& detady  = elem.get_detady();
     const std::vector<libMesh::Real>& detadz  = elem.get_detadz();
 
     libMesh::RealGradient dxi( dxidx[qp], dxidy[qp], dxidz[qp] );
     libMesh::RealGradient deta( detadx[qp], detady[qp], detadz[qp] );
 
     libMesh::RealGradient dudxi( grad_u(0), grad_v(0), grad_w(0) );
     libMesh::RealGradient dudeta( grad_u(1), grad_v(1), grad_w(1) );
 
     // Covariant metric tensor of reference configuration
     a_cov.zero();
     a_cov(0,0) = dxdxi[qp]*dxdxi[qp];
     a_cov(0,1) = dxdxi[qp]*dxdeta[qp];
     a_cov(1,0) = dxdeta[qp]*dxdxi[qp];
     a_cov(1,1) = dxdeta[qp]*dxdeta[qp];
 
     libMesh::Real det_a = a_cov(0,0)*a_cov(1,1) - a_cov(0,1)*a_cov(1,0);
 
     // Covariant metric tensor of current configuration
     A_cov.zero();
     A_cov(0,0) = (dxdxi[qp] + dudxi)*(dxdxi[qp] + dudxi);
     A_cov(0,1) = (dxdxi[qp] + dudxi)*(dxdeta[qp] + dudeta);
     A_cov(1,0) = (dxdeta[qp] + dudeta)*(dxdxi[qp] + dudxi);
     A_cov(1,1) = (dxdeta[qp] + dudeta)*(dxdeta[qp] + dudeta);
 
     // Contravariant metric tensor of reference configuration
     a_contra.zero();
     a_contra(0,0) = dxi*dxi;
     a_contra(0,1) = dxi*deta;
     a_contra(1,0) = deta*dxi;
     a_contra(1,1) = deta*deta;
 
     // Contravariant metric tensor in current configuration is A_cov^{-1}
     libMesh::Real det_A = A_cov(0,0)*A_cov(1,1) - A_cov(0,1)*A_cov(1,0);
 
     A_contra.zero();
     A_contra(0,0) =  A_cov(1,1)/det_A;
     A_contra(0,1) = -A_cov(0,1)/det_A;
     A_contra(1,0) = -A_cov(1,0)/det_A;
     A_contra(1,1) =  A_cov(0,0)/det_A;
 
     a_cov(2,2)    = 1.0;
     a_contra(2,2) = 1.0;
 
 
     // If the material is compressible, then lambda_sq is an independent variable
     if( _is_compressible )
       {
         lambda_sq = context.interior_value(this->_lambda_sq_var, qp);
       }
     else
       {
         // If the material is incompressible, lambda^2 is known
         lambda_sq = det_a/det_A;
       }
 
     A_cov(2,2) = lambda_sq;
     A_contra(2,2) = 1.0/lambda_sq;
   }

template<typename StressStrainLaw >

void GRINS::ElasticMembraneBase< StressStrainLaw >::init_variables ( libMesh::FEMSystem * )

virtual

Initialize variables for this physics.

Todo:: Might want to make Order/FEType inputable

Reimplemented from GRINS::Physics.

Definition at line 65 of file elastic_membrane_base.C.

References GRINS::Physics::init_variables().

   {
     // First call base class
     ElasticMembraneAbstract::init_variables(system);
 
     // Now build lambda_sq variable if we need it
     if(_is_compressible)
       {
         _lambda_sq_var = system->add_variable( "lambda_sq", GRINSEnums::FIRST, GRINSEnums::LAGRANGE);
       }
   }

template<typename StressStrainLaw >

void GRINS::ElasticMembraneBase< StressStrainLaw >::mass_residual_impl	(	bool	compute_jacobian,
		AssemblyContext &	context,
		InteriorFuncType	interior_solution,
		VarDerivType	get_solution_deriv,
		libMesh::Real	mu = `1.0`
	)

protected

Implementation of mass_residual.

The mu argument is needed to support Rayleigh Damping.

Definition at line 79 of file elastic_membrane_base.C.

Referenced by GRINS::ElasticMembrane< StressStrainLaw >::mass_residual().

   {
     const unsigned int n_u_dofs = context.get_dof_indices(_disp_vars.u()).size();
 
     const std::vector<libMesh::Real> &JxW =
       this->get_fe(context)->get_JxW();
 
     const std::vector<std::vector<libMesh::Real> >& u_phi =
       this->get_fe(context)->get_phi();
 
     // Residuals that we're populating
     libMesh::DenseSubVector<libMesh::Number> &Fu = context.get_elem_residual(_disp_vars.u());
     libMesh::DenseSubVector<libMesh::Number> &Fv = context.get_elem_residual(_disp_vars.v());
     libMesh::DenseSubVector<libMesh::Number>* Fw = NULL;
 
     libMesh::DenseSubMatrix<libMesh::Number>& Kuu = context.get_elem_jacobian(_disp_vars.u(),_disp_vars.u());
     libMesh::DenseSubMatrix<libMesh::Number>& Kvv = context.get_elem_jacobian(_disp_vars.v(),_disp_vars.v());
     libMesh::DenseSubMatrix<libMesh::Number>* Kww = NULL;
 
     if( this->_disp_vars.dim() == 3 )
       {
         Fw = &context.get_elem_residual(this->_disp_vars.w());
 
         Kww = &context.get_elem_jacobian(this->_disp_vars.w(),this->_disp_vars.w());
       }
 
     unsigned int n_qpoints = context.get_element_qrule().n_points();
 
     for (unsigned int qp=0; qp != n_qpoints; qp++)
       {
         libMesh::Real jac = JxW[qp];
 
         libMesh::Real u_ddot, v_ddot;
         (context.*interior_solution)( _disp_vars.u(), qp, u_ddot );
         (context.*interior_solution)( _disp_vars.v(), qp, v_ddot );
 
         libMesh::Real w_ddot = 0.0;
         if( this->_disp_vars.dim() == 3 )
           (context.*interior_solution)( _disp_vars.w(), qp, w_ddot );
 
         for (unsigned int i=0; i != n_u_dofs; i++)
           {
             Fu(i) += mu*this->_rho*_h0*u_ddot*u_phi[i][qp]*jac;
             Fv(i) += mu*this->_rho*_h0*v_ddot*u_phi[i][qp]*jac;
 
             if( this->_disp_vars.dim() == 3 )
               (*Fw)(i) += mu*this->_rho*_h0*w_ddot*u_phi[i][qp]*jac;
 
             if( compute_jacobian )
               {
                 for (unsigned int j=0; j != n_u_dofs; j++)
                   {
                     libMesh::Real jac_term = this->_rho*_h0*u_phi[i][qp]*u_phi[j][qp]*jac;
                     jac_term *= mu*(context.*get_solution_deriv)();
 
                     Kuu(i,j) += jac_term;
                     Kvv(i,j) += jac_term;
 
                     if( this->_disp_vars.dim() == 3 )
                       (*Kww)(i,j) += jac_term;
                   }
               }
           }
       }
   }