sfepy.mesh.mesh_generators module¶
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sfepy.mesh.mesh_generators.gen_block_mesh(dims, shape, centre, mat_id=0, name='block', verbose=True)[source]¶ Generate a 2D or 3D block mesh. The dimension is determined by the lenght of the shape argument.
Parameters: dims : array of 2 or 3 floats
Dimensions of the block.
shape : array of 2 or 3 ints
Shape (counts of nodes in x, y, z) of the block mesh.
centre : array of 2 or 3 floats
Centre of the block.
mat_id : int, optional
The material id of all elements.
name : string
Mesh name.
verbose : bool
If True, show progress of the mesh generation.
Returns: mesh : Mesh instance
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sfepy.mesh.mesh_generators.gen_cylinder_mesh(dims, shape, centre, axis='x', force_hollow=False, is_open=False, open_angle=0.0, non_uniform=False, name='cylinder', verbose=True)[source]¶ Generate a cylindrical mesh along an axis. Its cross-section can be ellipsoidal.
Parameters: dims : array of 5 floats
Dimensions of the cylinder: inner surface semi-axes a1, b1, outer surface semi-axes a2, b2, length.
shape : array of 3 ints
Shape (counts of nodes in radial, circumferential and longitudinal directions) of the cylinder mesh.
centre : array of 3 floats
Centre of the cylinder.
axis: one of ‘x’, ‘y’, ‘z’
The axis of the cylinder.
force_hollow : boolean
Force hollow mesh even if inner radii a1 = b1 = 0.
is_open : boolean
Generate an open cylinder segment.
open_angle : float
Opening angle in radians.
non_uniform : boolean
If True, space the mesh nodes in radial direction so that the element volumes are (approximately) the same, making thus the elements towards the outer surface thinner.
name : string
Mesh name.
verbose : bool
If True, show progress of the mesh generation.
Returns: mesh : Mesh instance
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sfepy.mesh.mesh_generators.gen_extended_block_mesh(b_dims, b_shape, e_dims, e_shape, centre, grading_fun=None, name=None)[source]¶ Generate a 3D mesh with a central block and (coarse) extending side meshes.
The resulting mesh is again a block. Each of the components has a different material id.
Parameters: b_dims : array of 3 floats
The dimensions of the central block.
b_shape : array of 3 ints
The shape (counts of nodes in x, y, z) of the central block mesh.
e_dims : array of 3 floats
The dimensions of the complete block (central block + extensions).
e_shape : int
The count of nodes of extending blocks in the direction from the central block.
centre : array of 3 floats
The centre of the mesh.
grading_fun : callable, optional
A function of
that can be used to shift nodes in the extension axis directions to allow smooth grading of element sizes from the centre. The default function is with determined so that the element sizes next to the central block have the size of the shortest edge of the central block.name : string, optional
The mesh name.
Returns: mesh : Mesh instance
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sfepy.mesh.mesh_generators.gen_mesh_from_goem(geo, a=None, quadratic=False, verbose=True, refine=False, polyfilename='./meshgen.poly', out='mesh', **kwargs)[source]¶ Runs mesh generator - tetgen for 3D or triangle for 2D meshes.
Parameters: geo : geometry
geometry description
a : int, optional
a maximum area/volume constraint
quadratic : bool, optional
set True for quadratic elements
verbose : bool, optional
detailed information
refine : bool, optional
refines mesh
Returns: mesh : Mesh instance
triangular or tetrahedral mesh
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sfepy.mesh.mesh_generators.gen_mesh_from_poly(filename, verbose=True)[source]¶ Import mesh generated by tetgen or triangle.
Parameters: filename : string
file name
Returns: mesh : Mesh instance
triangular or tetrahedral mesh
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sfepy.mesh.mesh_generators.gen_mesh_from_voxels(voxels, dims, etype='q')[source]¶ Generate FE mesh from voxels (volumetric data).
Parameters: voxels : array
Voxel matrix, 1=material.
dims : array
Size of one voxel.
etype : integer, optional
‘q’ - quadrilateral or hexahedral elements ‘t’ - triangular or tetrahedral elements
Returns
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mesh : Mesh instance
Finite element mesh.
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sfepy.mesh.mesh_generators.gen_misc_mesh(mesh_dir, force_create, kind, args, suffix='.mesh', verbose=False)[source]¶ Create sphere or cube mesh according to kind in the given directory if it does not exist and return path to it.
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sfepy.mesh.mesh_generators.gen_tiled_mesh(mesh, grid=None, scale=1.0, eps=1e-06, ret_ndmap=False)[source]¶ Generate a new mesh by repeating a given periodic element along each axis.
Parameters: mesh : Mesh instance
The input periodic FE mesh.
grid : array
Number of repetition along each axis.
scale : float, optional
Scaling factor.
eps : float, optional
Tolerance for boundary detection.
ret_ndmap : bool, optional
If True, return global node map.
Returns: mesh_out : Mesh instance
FE mesh.
ndmap : array
Maps: actual node id –> node id in the reference cell.