Coupled Traction Law

The Traction Law

This traction law is the same as the triangular traction law except that COD and traction are now effective terms that are related to normal and tangential components of traction and displacement:

      [math]\displaystyle{ {\rm Traction} = T_{eff} \qquad{\rm where} \qquad T_{eff} = \sqrt{T_n^2+T_t^2} }[/math]

      [math]\displaystyle{ {\rm cod} = \delta_{eff} \qquad{\rm where} \qquad \delta_{eff} = \sqrt{\delta_n^2+\delta_t^2} }[/math]

where T_n and T_t are the normal and tangential tractions and δ_n and δ_t are the normal and tangential CODs.

Traction Law Properties

The following properties are used to create a triangular traction law:

Property	Description	Units	Default
(other)	Properties common to all traction laws	varies	varies