Struct ElasticBeamColumn3 

pub struct ElasticBeamColumn3 {
    pub node_i: Node3Id,
    pub node_j: Node3Id,
    pub e: f64,
    pub g: f64,
    pub a: f64,
    pub j: f64,
    pub iy: f64,
    pub iz: f64,
    pub transform: GeomTransf3,
    pub density: f64,
}

ElasticBeamColumn’s spatial counterpart: a 2-node, prismatic, linear-elastic 3D Euler-Bernoulli beam-column (E, G, A, J, Iy, Iz), closed-form, GeomTransf3::Linear3 only — see this struct’s module-level context for why 3D P-Delta isn’t implemented yet: it needs force/tangent recovery already consistent in the linear case first.

Local DOF order per node [u, v, w, rx, ry, rz] (axial, then bending about local z causing local-y displacement v/rz, then bending about local y causing local-z displacement w/ry, torsion rx) — matches SpatialDof’s [Ux, Uy, Uz, Rx, Ry, Rz] order exactly, so no per-node DOF reordering is needed between local and global, only transform’s rotation. Verified against Xara/OpenSees’s ElasticBeam3d (basic- stiffness terms, local DOF order).

Fields

node_i: Node3Id

node_j: Node3Id

e: f64

g: f64

a: f64

j: f64

Torsion constant (St. Venant), not a polar moment of inertia for non-circular sections.

iy: f64

Second moment of area about local y — governs bending that displaces local z (w/ry).

iz: f64

Second moment of area about local z — governs bending that displaces local y (v/rz), the plane a 2D ElasticBeamColumn implicitly bends in.

transform: GeomTransf3

density: f64

Mass per unit volume; zero means massless.

Implementations

impl ElasticBeamColumn3

pub fn new( node_i: Node3Id, node_j: Node3Id, e: f64, g: f64, a: f64, j: f64, iy: f64, iz: f64, transform: GeomTransf3, ) -> Self

pub fn with_density(self, density: f64) -> Self

Trait Implementations

impl Clone for ElasticBeamColumn3

fn clone(&self) -> ElasticBeamColumn3

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ElasticBeamColumn3

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.