When sound propagates trough a solid, dislocations are excited if present. The interaction of sound with dislocations is supposed to be important to understand attenuation of sound in solids. Usually, these phenomena are studied in terms of models that lack some important part of the physics like the vectorial nature of elasticity. We have generalized these models by considering the full vectorial nature of the interaction and focused in different aspect, like the response of a single dislocation observed in recent experiments or a distribution of dislocation due to the relevance to wave attenuation. For example we can compare interference patterns observe in experiments with theoretical results, like the wave emitted by a pinned edge dislocation excited by a Raleigh surface wave.

We are also exploring the role of grain boundaries in sound attenuation. These boundaries can be considered as an array of dislocations. Most of our present work is formulated in terms of the continuum theory of linear elasticity, but we are also starting to analyze dislocation dynamics in atomistic models.

People involved:

Felipe Barra (Universidad de Chile)
Fernando Lund (Universidad de Chile)
Nicolas Mujica (Universidad de Chile)
Agnes Maurel (ESPCI)
Vincent Pagneux (Univeriste de Le mans).