Metadamping: an emergent phenomenon in dissipative metamaterials. Composite 3D-printed metastructures for low-frequency and broadband vibration absorption. H., Bauhofer, A., Krödel, S., Palermo, A. Minimal surface-based materials for topological elastic wave guiding. High strain-rate compression behavior of polymeric rod and plate Kelvin lattice structures. Energy absorption properties of periodic and stochastic 3D lattice materials. Shockwave dissipation by interface-dominated porous structures. Highly porous microlattices as ultrathin and efficient impact absorbers. Supersonic impact resilience of nanoarchitected carbon. Wave directionality in three-dimensional periodic lattices. Ultrasound experiments on acoustical activity in chiral mechanical metamaterials. Microlattice metamaterials for tailoring ultrasonic transmission with elastoacoustic hybridization. Mechanical metamaterials at the theoretical limit of isotropic elastic stiffness. 3D plate-lattices: an emerging class of low-density metamaterial exhibiting optimal isotropic stiffness. Tancogne-Dejean, T., Diamantopoulou, M., Gorji, M. Ultralight, ultrastiff mechanical metamaterials. Strong, lightweight, and recoverable three-dimensional ceramic nanolattices. Our work provides a route for accelerated data-driven discovery of materials and microdevices for dynamic applications such as protective structures, medical ultrasound or vibration isolation. We also show that frequency shifts in the vibrational response allow for characterization of invisible defects within the metamaterials and that selective probing allows for the construction of experimental elastic surfaces, which were previously only possible computationally. Using rod-like tessellations of microscopic metamaterials, we report up to 94% direction-dependent and rate-dependent dynamic stiffening at strain rates approaching 10 2 s −1, as well as damping properties three times higher than their constituent materials. Here we demonstrate a high-throughput, non-contact framework that uses MHz-wave-propagation signatures within a metamaterial to non-destructively extract dynamic linear properties, omnidirectional elastic information, damping properties and defect quantification. However, accessing dynamic properties at small scales has remained a challenge owing to low-throughput and destructive characterization 8, 16, 17 or lack of existing testing protocols. Their design principles can target frequency-dependent properties 5, 6, 7 and resilience under high-strain-rate deformation 8, 9, making them versatile materials for applications in lightweight impact resistance 10, 11, 12, acoustic waveguiding 7, 13 or vibration damping 14, 15. Mechanical metamaterials at the microscale exhibit exotic static properties owing to their engineered building blocks 1, 2, 3, 4, but their dynamic properties have remained substantially less explored.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |