Bending About the Y Axis

Bending about the Y axis can be seen in Figure 1. The equations relating to the moments being produced are calculated by:(1)

M_{y 1} = f_{y y} (θ_{y}) + C_{y y} {\dot{θ}}_{y}

(2)

M_{y 2} = - M_{y 1}

Where,

$θ_{y} = θ_{y 2} - θ_{y 1}$ is the relative rotation of node 1 and 2.

f_{y y} (θ_{y})

is the function defining the force-displacement relationship.