Bar1¶
Bases: Element
Two-node linear line element.
Notes
Node ordering:
0 ---- 1
facets()
¶
Local node indices of the codimension-1 facets.
Raises:
-
NotImplementedError–For line elements, which have no facets.
B(xi)
classmethod
¶
Evaluate reference-space derivatives of shape functions by autodiff.
Parameters:
-
xi(Tensor) –Reference coordinates. Shape:
(iso_dim,)or(n_points, iso_dim).
Returns:
-
Tensor(Tensor) –Derivatives
dN/dxi. Shape:(iso_dim, nodes)or(n_points, iso_dim, nodes).
H(xi)
classmethod
¶
Evaluate reference-space second derivatives of shape functions by autodiff.
Parameters:
-
xi(Tensor) –Reference coordinates. Shape:
(iso_dim,)or(n_points, iso_dim).
Returns:
-
Tensor(Tensor) –Second derivatives
d²N/dxi_i dxi_j. Shape:(iso_dim, iso_dim, nodes)or(n_points, iso_dim, iso_dim, nodes).
Shape functions¶
