Truss class

Parent class

• Element classes

Class doc

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

Representing a single truss element for finite deformation analysis between 2 nodes.

The element is using the following dofs:

• \(u\) (ux) and \(v\) (uy) in a 2D model.

• \(u\) (ux), \(v\) (uy) and \(w\) (uz) in a 3D model.

Internal variables

self.nodes	nodes i and j (tuple)
self.material	pointer to Material object
self.force	internal force (float)
self.Forces	nodal force vectors (list of np.arrays)
self.Kt	tangent stiffness (list of np.arrays)

getAxialForce()

Returns:

axial force in the truss. Positive value = tension.

updateState()

Compute internal state, nodal forces, and tangent stiffness for the current state of deformation.