Frame2D class

Parent class

Element classes

Class doc

class femedu.elements.finite.Frame2D.Frame2D(nodei, nodej, material, label=None)

class: representing a 2D frame element

Assumptions

The frame is in the X-Y-plane.
Small displacements and moderate rotations (\(P-\Delta\) model)
Navier’s and Bernoulli-Euler assumptions (plane sections and shear rigidity)
Linear elastic material (may change future releases)

The element is using dofs \(u\) (ux), \(v\) (uy) and \(\theta\) (rz)

Internal variables
self.nodes	nodes i and j (tuple)
self.material	pointer to Material object
self.force	internal force (list of arrays for axial force, _f_, shear, _V_, and moment, _M_)
self.Forces	nodal force vectors (list of np.arrays)
self.Kt	tangent stiffness (list of np.arrays)

getInternalForce(variable='')

computes vectors of normalized locations (s: ndarray) for which values (val: ndarray) are provided. Values of s are normalized to the interval \([0,1]\).

Returns:: tuple (s, val)

resetLoads(): default implementation for resetting element loads.

updateState()