New trends in non-destructive evaluation in relation to the smart materials concept

Periodical maintenance NDE-based inspections are today of a general accepta nce for almost all complex technological structures. Nevertheless, the idea that the integrated and continuous sensing techniques can optimize the ope rating conditions is now in progress. Different aspects of this evolution t owards health monitoring are discussed in relation with the smart materials concept through a non-exhaustive review of some realizations or experience s essentially focused on the field of sensitive materials. Piezoelectric im plant technique and in situ electric resistance measurements on carbon epox y composites are presented with more details. Finally, by extension, it see ms useful to introduce the adaptive materials-based new concept of `health saving'.