export_mcids Module

Defines:

• nodes, bars = export_mcids(bdf_filename, csv_filename=None)

pyNastran.bdf.mesh_utils.export_mcids._add_elements(nid: int, eid: int, nodes: List[Tuple[int, float, float, float]], bars: List[Tuple[int, int, int]], centroid: numpy.ndarray, iaxis: numpy.ndarray, jaxis: numpy.ndarray, export_both_axes: bool, export_xaxis: bool) → Tuple[int, int]

adds the element data

pyNastran.bdf.mesh_utils.export_mcids._export_coord_axes(nodes, bars, csv_filename: str)

save the coordinate systems in a csv file

pyNastran.bdf.mesh_utils.export_mcids._export_quad_mcid(model: pyNastran.bdf.bdf.BDF, elem, nodes, iply: int, nid: int, eid: int, bars: List[List[int]], export_both_axes: bool, export_xaxis: bool, consider_property_rotation: bool) → Tuple[int, int]

helper method for export_mcids

pyNastran.bdf.mesh_utils.export_mcids._export_quad_mcid_all(model: pyNastran.bdf.bdf.BDF, elem: Union[pyNastran.bdf.cards.elements.shell.CTRIA3, pyNastran.bdf.cards.elements.shell.CTRIA6, pyNastran.bdf.cards.elements.shell.CQUAD4, pyNastran.bdf.cards.elements.shell.CQUAD8, pyNastran.bdf.cards.elements.shell.CTRIAR, pyNastran.bdf.cards.elements.shell.CQUADR], nplies: int, nids: Dict[int, int], nodes: Dict[int, List[numpy.ndarray]], bars: Dict[int, List[Tuple[int, int]]]) → None

helper method for export_mcids

pyNastran.bdf.mesh_utils.export_mcids._export_tri_mcid_all(model: pyNastran.bdf.bdf.BDF, elem: Union[pyNastran.bdf.cards.elements.shell.CTRIA3, pyNastran.bdf.cards.elements.shell.CTRIA6, pyNastran.bdf.cards.elements.shell.CQUAD4, pyNastran.bdf.cards.elements.shell.CQUAD8, pyNastran.bdf.cards.elements.shell.CTRIAR, pyNastran.bdf.cards.elements.shell.CQUADR], nplies: int, nids: Dict[int, int], nodes: Dict[int, List[numpy.ndarray]], bars: Dict[int, List[Tuple[int, int]]]) → None

helper method for export_mcids

pyNastran.bdf.mesh_utils.export_mcids._export_tria_mcid(model: pyNastran.bdf.bdf.BDF, elem: Union[pyNastran.bdf.cards.elements.shell.CTRIA3, pyNastran.bdf.cards.elements.shell.CTRIA6, pyNastran.bdf.cards.elements.shell.CQUAD4, pyNastran.bdf.cards.elements.shell.CQUAD8, pyNastran.bdf.cards.elements.shell.CTRIAR, pyNastran.bdf.cards.elements.shell.CQUADR], nodes, iply: int, nid: int, eid: int, bars, export_both_axes: bool, export_xaxis: bool, consider_property_rotation: bool) → Tuple[int, int]

helper method for export_mcids

pyNastran.bdf.mesh_utils.export_mcids._export_xaxis(nid: int, nodes: List[numpy.ndarray], bars: List[numpy.ndarray], centroid: numpy.ndarray, iaxis: numpy.ndarray) → int

pyNastran.bdf.mesh_utils.export_mcids._get_elements(model, eids)

pyNastran.bdf.mesh_utils.export_mcids._get_quad_vectors_mcid(elem: pyNastran.bdf.cards.elements.shell.CQUAD4)

pyNastran.bdf.mesh_utils.export_mcids._get_tri_vectors_mcid(elem: pyNastran.bdf.cards.elements.shell.CTRIA3)

pyNastran.bdf.mesh_utils.export_mcids._load_bdf(bdf_filename: Union[BDF, str], log: Optional[SimpleLogger] = None, debug: bool = True) → BDF

pyNastran.bdf.mesh_utils.export_mcids._make_element_coord_quad(elem: Union[pyNastran.bdf.cards.elements.shell.CTRIA3, pyNastran.bdf.cards.elements.shell.CTRIA6, pyNastran.bdf.cards.elements.shell.CQUAD4, pyNastran.bdf.cards.elements.shell.CQUAD8, pyNastran.bdf.cards.elements.shell.CTRIAR, pyNastran.bdf.cards.elements.shell.CQUADR], pid_ref, nids, nodes, bars)

pyNastran.bdf.mesh_utils.export_mcids._make_element_coord_tri(elem: Union[pyNastran.bdf.cards.elements.shell.CTRIA3, pyNastran.bdf.cards.elements.shell.CTRIA6, pyNastran.bdf.cards.elements.shell.CQUAD4, pyNastran.bdf.cards.elements.shell.CQUAD8, pyNastran.bdf.cards.elements.shell.CTRIAR, pyNastran.bdf.cards.elements.shell.CQUADR], pid_ref, nids, nodes, bars)

pyNastran.bdf.mesh_utils.export_mcids._rotate_coords(elem: ShellElement, pid_ref, nplies: int, nids: Dict[int, int], nodes: Dict[int, List[Any]], bars: Dict[int, List[Any]], dxyz: float, centroid: np.ndarray, imat: np.ndarray, jmat: np.ndarray, normal: np.ndarray) → None

iply Final Label Description ==== =========== =========== -1 0 material coordinate system 0 1 ply 1 1 2 ply 2 2 3 ply 3

#nplies = 3 nids - {-1: 0, 0: 0, 1: 0, 2: 0} nodes = {-1: [], 0: [], 1: [], 2: []} bars = {-1: [], 0: [], 1: [], 2: []}

pyNastran.bdf.mesh_utils.export_mcids._rotate_mcid(elem: Union[pyNastran.bdf.cards.elements.shell.CTRIA3, pyNastran.bdf.cards.elements.shell.CTRIA6, pyNastran.bdf.cards.elements.shell.CQUAD4, pyNastran.bdf.cards.elements.shell.CQUAD8, pyNastran.bdf.cards.elements.shell.CTRIAR, pyNastran.bdf.cards.elements.shell.CQUADR], pid_ref: Union[pyNastran.bdf.cards.properties.shell.PCOMP, pyNastran.bdf.cards.properties.shell.PCOMPG, pyNastran.bdf.cards.properties.shell.PSHELL], iply: int, imat: numpy.ndarray, jmat: numpy.ndarray, normal: numpy.ndarray, consider_property_rotation: bool = True) → Tuple[numpy.ndarray, numpy.ndarray]

Rotates a material coordinate system. Assumes the element theta/mcid has already been acounted for.

pyNastran.bdf.mesh_utils.export_mcids._rotate_single_coord(elem: Union[pyNastran.bdf.cards.elements.shell.CTRIA3, pyNastran.bdf.cards.elements.shell.CTRIA6, pyNastran.bdf.cards.elements.shell.CQUAD4, pyNastran.bdf.cards.elements.shell.CQUAD8, pyNastran.bdf.cards.elements.shell.CTRIAR, pyNastran.bdf.cards.elements.shell.CQUADR], pid_ref, iply: int, nid, eid, nodes, bars, dxyz: float, centroid: numpy.ndarray, imat: numpy.ndarray, jmat: numpy.ndarray, normal: numpy.ndarray, export_both_axes: bool, export_xaxis: bool, consider_property_rotation: bool) → Tuple[int, int]

pyNastran.bdf.mesh_utils.export_mcids.export_mcids(bdf_filename: Union[pyNastran.bdf.bdf.BDF, str], csv_filename: Optional[str] = None, eids: Optional[List[int]] = None, export_xaxis: bool = True, export_yaxis: bool = True, consider_property_rotation: bool = True, iply: int = 0, log=None, debug=False)

Exports the element material coordinates systems for non-isotropic materials.

Parameters

bdf_filenamestr/BDF

a bdf filename or BDF model

csv_filenamestr; default=None

str : the path to the output csv None : don’t write a CSV

eidsList[int]

the element ids to consider

export_xaxisbool; default=True

export the x-axis

export_yaxisbool; default=True

export the x-axis

consider_property_rotationbool; default=True

rotate the coordinate system

iplyint; default=0

TODO: not validated the ply to consider

pid_to_npliesDict[int pid, int nplies]; default=None -> auto

optional dictionary to speed up analysis

PSHELL

iply location —- ——–

0 mid1 or mid2 1 mid1 2 mid2 3 mid3 4 mid4

PCOMP/PCOMPG

iply location —- ——– 0 layer1 1 layer2

Returns

nodes(nnodes, 3) float list

the nodes

bars(nbars, 2) int list

the “bars” that represent the x/y axes of the coordinate systems

pyNastran.bdf.mesh_utils.export_mcids.export_mcids_all(bdf_filename: Union[BDF, str], eids: Optional[List[int]] = None, log: Optional[SimpleLogger] = None, debug: bool = False)

Exports the element material coordinates systems for non-isotropic materials.

Note that for two quads identically oriented/numbered PSHELL quads with theta different between the two, the mcid will be different.

Parameters

bdf_filenamestr/BDF

a bdf filename or BDF model

csv_filenamestr; default=None

str : the path to the output csv None : don’t write a CSV

eidsList[int]

the element ids to consider

PSHELL

iply location —- ——–

0 mid1 or mid2 1 mid1 2 mid2 3 mid3 4 mid4

PCOMP/PCOMPG

iply location —- ——– 0 layer1 1 layer2

Returns

nodes(nnodes, 3) float list

the nodes

bars(nbars, 2) int list

the “bars” that represent the x/y axes of the coordinate systems

pyNastran.bdf.mesh_utils.export_mcids.get_pid_ref_prop_type(model: pyNastran.bdf.bdf.BDF, elem) → Tuple[Union[pyNastran.bdf.cards.properties.shell.PCOMP, pyNastran.bdf.cards.properties.shell.PCOMPG, pyNastran.bdf.cards.properties.shell.PSHELL], str]

helper method for export_mcids

pyNastran.bdf.mesh_utils.export_mcids.get_pid_to_nplies(model: pyNastran.bdf.bdf.BDF) → Tuple[Dict[int, int], int]