The amplitude-dependent mechanical loss due to the bowing of an idealized Frank-Read source was studied by using simulation and analytical techniques. Dislocations were modelled within isotropic elasticity theory, and were assumed to be at the over-damped limit. The dynamics of the model were tested by direct comparison with the exact solution to the linearized isotropic elasticity theory of mechanical losses. The model was then applied to a study of the mechanical losses arising from 2 coupled dislocations. It was concluded that the dislocation dynamics method used represented an accurate solution of the initial problem, that the elastic string model often used to model losses

was inadequate and that dislocation interactions cold substantially alter the dislocation component of the spectrum which was observed during internal friction experiments.

Continuum Simulation of Dislocation Dynamics - Predictions for Internal Friction Response. P.A.Greaney, L.H.Friedman, D.C.Chrzan: Computational Materials Science, 2002, 25[3], 387-403