Meshpresso module¶

The following section contains a documentation of the Meshpresso module implementation.

class meshpresso.Mesh(model_name, dict_of_parts, asbly_element_sets=None, asbly_node_sets=None, asbly_surfaces=None)[source]¶

Mesh is the most general class used to import, store and export mesh data. the idea is to initialise the constructor, then import mesh from db file. finally, the mesh can be exported to an external format. for example

>>> mesh = Mesh()
>>> mesh.import_from_db_file(path_to_db_file='mesh.db')
>>> mesh.export_to_calculix(exported_filename='calculix.inp')
>>> mesh.export_to_unv_format(exported_filename='salome.unv')

model_name¶

name of imported model

Type: string

parts¶

list of imported parts

Type: list

assembly_mesh¶

the dictionary contains parts, but those have renumbered node and element labels, so that the labels are not repeating

Type: dictionary

export_to_calculix(exported_filename)[source]¶

function to export mesh to calculix format

Parameters: exported_filename (str) – name of the file to export mesh (eg ‘calculix.inp’)

export_to_unv_format(exported_filename)[source]¶

function to export to unv format

Parameters: exported_filename (str) – name of the file to export mesh (eg ‘salome.unv’)

get_calculix_surf_definition()[source]¶

function converts surfaces into format appropriate for calculix.

Returns: dictionary with surface name as keys and dictionary surface definition as value
Return type: dict

classmethod import_from_abaqus_cae(abq_model_name, abq_root_assembly)[source]¶

function to initiate the mesh object

Parameters

abq_model_name (str) – name of the abaqus model
abq_part_list (list) – list of abaqus parts to export mesh from

Returns

object containing model mesh definition

Return type

Mesh

classmethod import_from_db_file(path_to_db_file)[source]¶

function to initiate the mesh object

Parameters: path_to_db_file (str) – path to the db file
Returns: object containing model mesh definition
Return type: mesh

renumber_mesh()[source]¶

function computes mesh at assembly level from list of part objects. the returned dictionary contains parts with renumbered nodes and elements

Returns: dictionary of parts
Return type: defaultdict(list)

save_to_db_file(name_of_db_file)[source]¶

function to save model data to db file

Parameters: name_of_db_file (str) – name of the file that will be used to store data

set_salome_surf_definition()[source]¶

function converts surfaces into format appropriate for salome.

Returns: dictionary with surface name as keys and dictionary surface definition as value
Return type: dict

class meshpresso.PartMesh(part_name, part_nodes, part_elements, element_sets=None, node_sets=None, surfaces=None)[source]¶

PartMesh is an object used to store mesh properties for a given part.

name¶

name of the part

Type: str

nodes¶

list of the node objects

Type: list of node objects

elements¶

list of the element objects

Type: list

elements_by_type¶

dictionary of elements grouped by element type

Type: defaultdict(list)

el_set¶

dictionary of element sets grouped by element set name

Type: defaultdict(list)

n_set¶

dictionary of node sets grouped by node set name

Type: defaultdict(list)

surfaces¶

dictionary of surfaces {surf_name: {‘nodes’: n_set, ‘elements’: el_set, ‘sides’: string}, by default None

Type: defaultdict(list), optional

classmethod from_abaqus_cae(abq_part)[source]¶

function to initiate object from abaqus part.

Parameters: abq_part (abq_part) – abaqus part object
Returns: object containing part mesh definition
Return type: part_mesh

get_elements_by_type()[source]¶

function used to create a dictionary of elements with element types used as keys

Returns: dictionary of elements with elementtypes used as keys
Return type: defaultdict(list)

get_elements_from_label_list(label_list)[source]¶

function to retrieve the elements from list of elements labels.

Parameters: label_list (list) – list of integers referring to element labels
Returns: list of element objects
Return type: list

get_nodes_from_label_list(label_list)[source]¶

function to retrieve the nodes from list of node labels

Parameters: label_list (list) – list of integers describing node labes
Returns: list of node objects
Return type: list

reorder_nodes_in_el_definition(mesh_format)[source]¶

function used to reorder nodes. by default the node order is the same as in abaqus.

Parameters: mesh_format (str) – format of mesh to be converted to

set_element_type_format(new_format)[source]¶

function to change element types in dictionary elements_by_type (for example from c3_d20_r to 116)

Parameters: new_format (str) – new format (eg ‘UNV’)

class meshpresso.Element(el_type, el_label, el_connect, part_all_nodes)[source]¶

class used to store information about elements, theirs type, label and connection to nodes

type¶

element type (eg C3D4)

Type: str

label¶

element number

Type: int

connectivity¶

list of nodes that element is based on

Type: list

change_label(new_label)[source]¶

a function to change element label

Parameters: new_label (int) – new element number

get_node_labels()[source]¶

function returns labels of nodes which building the element

Returns: list of integers describing node labels
Return type: list

class meshpresso.Node(n_label, n_coords)[source]¶

used to create node objects from external data

label¶

node number

Type: int

coordinates¶

node coordinates

Type: tuple

change_label(new_label)[source]¶

a function to change node label

Parameters: new_label (int) – new node number

CoFEA Initiative

Meshpresso module¶