LocalIntegrators::Elasticity Namespace Reference

Local integrators related to elasticity problems. More...

Functions
template<int dim>
void	cell_matrix (FullMatrix< double > &M, const FEValuesBase< dim > &fe, const double factor=1.)
template<int dim, typename number >
void	cell_residual (Vector< number > &result, const FEValuesBase< dim > &fe, const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &input, double factor=1.)
template<int dim>
void	nitsche_matrix (FullMatrix< double > &M, const FEValuesBase< dim > &fe, double penalty, double factor=1.)
template<int dim>
void	nitsche_tangential_matrix (FullMatrix< double > &M, const FEValuesBase< dim > &fe, double penalty, double factor=1.)
template<int dim, typename number >
void	nitsche_residual (Vector< number > &result, const FEValuesBase< dim > &fe, const VectorSlice< const std::vector< std::vector< double > > > &input, const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &Dinput, const VectorSlice< const std::vector< std::vector< double > > > &data, double penalty, double factor=1.)
template<int dim, typename number >
void	nitsche_tangential_residual (Vector< number > &result, const FEValuesBase< dim > &fe, const VectorSlice< const std::vector< std::vector< double > > > &input, const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &Dinput, const VectorSlice< const std::vector< std::vector< double > > > &data, double penalty, double factor=1.)
template<int dim, typename number >
void	nitsche_residual_homogeneous (Vector< number > &result, const FEValuesBase< dim > &fe, const VectorSlice< const std::vector< std::vector< double > > > &input, const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &Dinput, double penalty, double factor=1.)
template<int dim>
void	ip_matrix (FullMatrix< double > &M11, FullMatrix< double > &M12, FullMatrix< double > &M21, FullMatrix< double > &M22, const FEValuesBase< dim > &fe1, const FEValuesBase< dim > &fe2, const double pen, const double int_factor=1., const double ext_factor=-1.)
template<int dim, typename number >
void	ip_residual (Vector< number > &result1, Vector< number > &result2, const FEValuesBase< dim > &fe1, const FEValuesBase< dim > &fe2, const VectorSlice< const std::vector< std::vector< double > > > &input1, const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &Dinput1, const VectorSlice< const std::vector< std::vector< double > > > &input2, const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &Dinput2, double pen, double int_factor=1., double ext_factor=-1.)

Detailed Description

Local integrators related to elasticity problems.

Author

Guido Kanschat

Date

2010

Function Documentation

cell_matrix()

template<int dim>

void LocalIntegrators::Elasticity::cell_matrix ( FullMatrix< double > &  M, const FEValuesBase< dim > &  fe, const double  factor = 1.  )

inline

The linear elasticity operator in weak form, namely double contraction of symmetric gradients.

\[ \int_Z \varepsilon(u): \varepsilon(v)\,dx \]

Definition at line 48 of file elasticity.h.

cell_residual()

template<int dim, typename number >

void LocalIntegrators::Elasticity::cell_residual ( Vector< number > &  result, const FEValuesBase< dim > &  fe, const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &  input, double  factor = 1.  )

inline

Vector-valued residual operator for linear elasticity in weak form

\[ - \int_Z \varepsilon(u): \varepsilon(v) \,dx \]

Definition at line 80 of file elasticity.h.

nitsche_matrix()

template<int dim>

void LocalIntegrators::Elasticity::nitsche_matrix ( FullMatrix< double > &  M, const FEValuesBase< dim > &  fe, double  penalty, double  factor = 1.  )

inline

The matrix for the weak boundary condition of Nitsche type for linear elasticity:

\[ \int_F \Bigl(\gamma u \cdot v - n^T \epsilon(u) v - u \epsilon(v) n\Bigr)\;ds. \]

Definition at line 115 of file elasticity.h.

nitsche_tangential_matrix()

template<int dim>

void LocalIntegrators::Elasticity::nitsche_tangential_matrix ( FullMatrix< double > &  M, const FEValuesBase< dim > &  fe, double  penalty, double  factor = 1.  )

inline

The matrix for the weak boundary condition of Nitsche type for the tangential displacement in linear elasticity:

\[ \int_F \Bigl(\gamma u_\tau \cdot v_\tau - n^T \epsilon(u_\tau) v_\tau - u_\tau^T \epsilon(v_\tau) n\Bigr)\;ds. \]

Definition at line 160 of file elasticity.h.

nitsche_residual()

template<int dim, typename number >

void LocalIntegrators::Elasticity::nitsche_residual	(	Vector< number > &	result,
		const FEValuesBase< dim > &	fe,
		const VectorSlice< const std::vector< std::vector< double > > > &	input,
		const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &	Dinput,
		const VectorSlice< const std::vector< std::vector< double > > > &	data,
		double	penalty,
		double	factor = 1.
	)

Weak boundary condition for the elasticity operator by Nitsche, namely on the face F the vector

\[ \int_F \Bigl(\gamma (u-g) \cdot v - n^T \epsilon(u) v - (u-g) \epsilon(v) n^T\Bigr)\;ds. \]

Here, u is the finite element function whose values and gradient are given in the arguments input and Dinput, respectively. g is the inhomogeneous boundary value in the argument data. \(n\) is the outer normal vector and \(\gamma\) is the usual penalty parameter.

Author

Guido Kanschat

Date

2013

Definition at line 231 of file elasticity.h.

nitsche_tangential_residual()

template<int dim, typename number >

void LocalIntegrators::Elasticity::nitsche_tangential_residual ( Vector< number > &  result, const FEValuesBase< dim > &  fe, const VectorSlice< const std::vector< std::vector< double > > > &  input, const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &  Dinput, const VectorSlice< const std::vector< std::vector< double > > > &  data, double  penalty, double  factor = 1.  )

inline

The weak boundary condition of Nitsche type for the tangential displacement in linear elasticity:

\[ \int_F \Bigl(\gamma (u_\tau-g_\tau) \cdot v_\tau - n^T \epsilon(u_\tau) v - (u_\tau-g_\tau) \epsilon(v_\tau) n\Bigr)\;ds. \]

Definition at line 279 of file elasticity.h.

nitsche_residual_homogeneous()

template<int dim, typename number >

void LocalIntegrators::Elasticity::nitsche_residual_homogeneous	(	Vector< number > &	result,
		const FEValuesBase< dim > &	fe,
		const VectorSlice< const std::vector< std::vector< double > > > &	input,
		const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &	Dinput,
		double	penalty,
		double	factor = 1.
	)

Homogeneous weak boundary condition for the elasticity operator by Nitsche, namely on the face F the vector

\[ \int_F \Bigl(\gamma u \cdot v - n^T \epsilon(u) v - u \epsilon(v) n^T\Bigr)\;ds. \]

Here, u is the finite element function whose values and gradient are given in the arguments input and Dinput, respectively. \(n\) is the outer normal vector and \(\gamma\) is the usual penalty parameter.

Author

Guido Kanschat

Date

2013

Definition at line 354 of file elasticity.h.

ip_matrix()

template<int dim>

void LocalIntegrators::Elasticity::ip_matrix ( FullMatrix< double > &  M11, FullMatrix< double > &  M12, FullMatrix< double > &  M21, FullMatrix< double > &  M22, const FEValuesBase< dim > &  fe1, const FEValuesBase< dim > &  fe2, const double  pen, const double  int_factor = 1., const double  ext_factor = -1.  )

inline

The interior penalty flux for symmetric gradients.

Definition at line 396 of file elasticity.h.

ip_residual()

template<int dim, typename number >

void LocalIntegrators::Elasticity::ip_residual	(	Vector< number > &	result1,
		Vector< number > &	result2,
		const FEValuesBase< dim > &	fe1,
		const FEValuesBase< dim > &	fe2,
		const VectorSlice< const std::vector< std::vector< double > > > &	input1,
		const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &	Dinput1,
		const VectorSlice< const std::vector< std::vector< double > > > &	input2,
		const VectorSlice< const std::vector< std::vector< Tensor< 1, dim > > > > &	Dinput2,
		double	pen,
		double	int_factor = 1.,
		double	ext_factor = -1.
	)

Elasticity residual term for the symmetric interior penalty method.

Author

Guido Kanschat

Date

2013

Definition at line 476 of file elasticity.h.