Master contact body which surface will be used to project contact stresses and stiffness terms. More...

#include <getfem_level_set_contact.h>

Inherits level_set_contact::contact_body.

Public Member Functions
	master_contact_body (model &_md, const std::string &_var_name, size_type _mult_order, size_type _mult_mim_order)
	create master contact body with a model, name where masters displacements are defined, order for Lagrange multiplier, order for the integration method

	master_contact_body (model &_md, const std::string &_var_name, size_type _mult_order, const std::string &_mult_int_method, contact_integration _integration=PER_ELEMENT, scalar_type _regularized_tollerance=1e-6, scalar_type _small_weight_multiplier=0.001, scalar_type _max_contact_angle=45)
	the same as above, but specifically provide itegration method on the contact surface (_mult_int_method), additionally, specify if surface contact elements have to be cut by the level set. More...

void	add_slave (slave_contact_body &scb, size_type slave_contact_region=-1)
	associate a slave contact body with this master. More...

size_type	contact_mim_order () const
	order of integration of boundary contact terms

getfem::pintegration_method	contact_int_method () const
	integration method on the contact surface, use it when the master is created with a specific integration method and not the approx_order

size_type	volume_region () const
	region of all volume elements without the boundary

size_type	boundary_region () const
	boundary elements, added after creation of the master contact body

const contact_pair_info &	get_pair_info (const std::string &slave_var_name) const
	access to a structure that contains all the info about contact pair between this master and a slave, defined on More...

contact_pair_info &	get_pair_info (const std::string &slave_var_name)
	the same as above, but non-const

std::shared_ptr< mesh_im >	build_mesh_im_on_boundary (size_type region)
	return a pointer to mesh_im used for contact surface calculations

face_type	ext_face_of_elem (size_type cv) const
	gives a face, corresponding to newly created boundary element More...

Static Public Member Functions
static bool	any_contact_change ()
	contact detection for all masters/slave couples More...

static void	clear_all_contact_history ()
	should be used in the beginning of a step to clean data structures that store previous contact element lists (used to verify if contact surface is converged to one list)

Public Attributes
const size_type	mult_mf_order
	approximation order for Lagrange multiplier on the contact surface

const contact_integration	integration
	integration approach for contact elements that are partially crossed by level sets: PER_ELEMENT - a whole element is incuded into contact (default) REGULARIZED_LEVEL_SET - Gauss points where projected value of the level set is < zero are set to zero or small value (with gradual transition)

const scalar_type	regularized_tollerance
	width of transition for a regularazied Heaviside function in case of REGULARIZED_LEVEL_SET

const scalar_type	small_weight_multiplier
	in case of REGULARIZED_LEVEL_SET this value scales weight of Gauss points that have negative level set value

const scalar_type	max_contact_angle
	if the angle (in degrees) between contact element and level set contour exceed this value, this element is not included in contact algorithm

Protected Member Functions
bool	master_contact_changed (void)
	contact detection for all slaves

void	clear_contact_history (void)
	clearing previous contact elem lists

Detailed Description

Master contact body which surface will be used to project contact stresses and stiffness terms.

It contains and manages the slaves and knows other masters. Master contact body must be created with mesh_fem that allows automatic addition of mesh_fem description on new elements (use mesh_fem::set_auto_add or use set_classical_finite_element). This feature is used when new boundary elements are created from faces. At the same time the mesh_im object that is used to add for instance some structural bricks on the volume (elastostatic, nonlinear_elastostatic, updated_lagrangian) should be either created before master contact body, or set on master_contact_body::volume_region() if it's created after. This is to avoid integration of the volume integrals on the boundary elemenents of lower dimension.

Definition at line 287 of file getfem_level_set_contact.h.

Constructor & Destructor Documentation

◆ master_contact_body()

level_set_contact::master_contact_body::master_contact_body	(	model &	_md,
		const std::string &	_var_name,
		size_type	_mult_order,
		const std::string &	_mult_int_method,
		contact_integration	_integration = `PER_ELEMENT`,
		scalar_type	_regularized_tollerance = `1e-6`,
		scalar_type	_small_weight_multiplier = `0.001`,
		scalar_type	_max_contact_angle = `45`
	)

the same as above, but specifically provide itegration method on the contact surface (_mult_int_method), additionally, specify if surface contact elements have to be cut by the level set.

The later ensures that contact surface is strictly a domain that overlaps with the slave, hence this allows smooth growth of the contact surface. The level set cutting is done using regularized Heaviside function

Definition at line 99 of file getfem_level_set_contact.cc.

Member Function Documentation

◆ add_slave()

void level_set_contact::master_contact_body::add_slave	(	slave_contact_body &	scb,
		size_type	slave_contact_region = `-1`
	)

associate a slave contact body with this master.

\ specify a region of expected contact interaction. \ (takes the whole master boundary if not specified)

Definition at line 161 of file getfem_level_set_contact.cc.

◆ get_pair_info()

const level_set_contact::contact_pair_info & level_set_contact::master_contact_body::get_pair_info ( const std::string & slave_var_name ) const

access to a structure that contains all the info about contact pair between this master and a slave, defined on

Parameters

slave_var_name

Definition at line 132 of file getfem_level_set_contact.cc.

◆ any_contact_change()

bool level_set_contact::master_contact_body::any_contact_change ( )

static

contact detection for all masters/slave couples

Returns: true if any of the contact areas where changed (which requires new Newton method run)

Definition at line 235 of file getfem_level_set_contact.cc.

◆ ext_face_of_elem()

level_set_contact::face_type level_set_contact::master_contact_body::ext_face_of_elem ( size_type cv ) const

gives a face, corresponding to newly created boundary element

Parameters

cv

Definition at line 152 of file getfem_level_set_contact.cc.

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

src/getfem/getfem_level_set_contact.h
src/getfem_level_set_contact.cc

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Member Functions