On the spatial behaviour in dynamics of elastic mixtures

This paper studies the spatial behaviour of the dynamic processes in elasti c mixtures. With this aim we use the time-weighted surface power function m ethod associated with the linear processes. Consequently, we obtain a preci se determination of the domain of influence and the spatial decay estimates with time-independent decay rate inside of the domain of influence. A uniq ueness theorem is proved for finite and infinite bodies and we note that it is free of any kind of a priori assumptions on the solutions at infinity. (C) 2001 Editions scientifiques et medicales Elsevier SAS.