Coupled Axial-Torsion Cross Section The cross section is used to model axisymmetric parts of the slender system which have a coupled axial / torsion stiffness properties and / or bending / curvature hysteresis effects. The cross section is especially useful for modelling cables with armour layers. The hydrodynamic load models Morison’s generalized Equation Morison partly submerged cross sections MacCamy Fuchs Potential flow Time domain VIV loads No hydrodynamic loads are available for Coupled axial-torsion Cross Section. For details, please see Hydrodynamic load models. For details of the input file please see Coupled axial-torsion Cross Section - input reference. Examples of hysteresis modeling Thin-walled Pipe Cross Section