Recueil de communications école d'hiver 2025 GDR ARCHI-META - DN METACMED

The last 20 years have seen a remarkable growth in scientific interest in (elastic and mechanical) metamaterials. One of the reasons for this is the great potential that this subject area has in itself as a “link between different disciplines”, particularly acoustics and solid mechanics. In addition, through a better mastery of architecture, it makes it possible to create complex enginee- ring systems with unconventional dynamic and quasi-static behavior. However, the literature seems to show that since its introduction in the early 2000s, two almost independent macro-communities have formed around this subject: that of acousticians, more focused on phenomenology, and that of mechanics, more focused on methodology. However, it is clear that 1) these two communities are dealing with the same scientific problem, and that 2) certain differences in purpose and lan- guage have given, and still give, the impression that these are two loosely coupled fields of research. This has made intercommunity dialogue insufficient until now. However, it is easy to see that the subjects investigated and the me- thodologies used are generally complementary. The time has come for a new community to emerge, particularly at the international level. In this context, the ARCHI-META GdR proposes to seize this spontaneous convergence and act as a catalyst to go beyond the specificities related to acoustics and mechanics, and thus to bring together a new community around architectured metamaterials. The overall objective is to get the communities (mechanics and acousticians) to work together to identify and resolve the common scientific issues that have come to light in recent years and to share the theoretical tools specific to the two communities in order to establish a common language. This synergy will make it possible to address more effec- tively the scientific issues limiting the development of these promising techno- logies.