A soliton approach to acoustic emission during the plastic deformation of crystals was presented. It was based upon a microscopic Frenkel-Kontorova model in which the rigidity of the substrate was removed in order to establish the interaction mechanism between a dislocation and both longitudinal and transverse acoustic waves. It was shown that this interaction was described by a sine-Gordon d'Alembert system. Within the framework of this system, two basic mechanisms of acoustic emission were analytically and numerically investigated. One mechanism was related to non-stationary dislocation motion, and the other one to the annihilation of dislocation kink-antikink pairs during Frank-Read source operation. In both cases, computer simulations were obtained which graphically illustrated analytical considerations and modelled acoustic radiation. The results were in agreement with existing experimental data and were expected to provide better physical insight into acoustic emission mechanisms during the plastic deformation of crystals.

Dislocation Dynamics and Acoustic Emission during Plastic Deformation of Crystals. B.Polyzos, A.Trochidis: Wave Motion, 1995, 21[4], 343-55