76 citations · 186 across the 25 of their papers we have counts for
10 papers · 1 filter
Underwater Focussing of Sound by Umklapp Diffraction
Gregory J. Chaplain, Richard V. Craster, Nick Cole +2
Scholte modes that are localized between a submerged axisymmetric-structured elastic plate and surrounding fluid can undergo mode conversion via Umklapp diffraction into radiative…
The influence of structure geometry and material on seismic metamaterial performance
T. Venkatesh Varma, Bogdan Ungureanu, Saikat Sarkar +3
Diverting, and controlling, elastic vibrations impacting upon infrastructure is a major challenge for seismic hazard mitigation, and for the reduction of machine noise and vehicle…
Designing Hyper-Thin Acoustic Metasurfaces with Membrane Resonators
Yao-Ting Wang, Richard Craster
We design extremely-thin acoustic metasurfaces, providing a versatile platform for the manipulation of reflected pressure fields, that are constructed from mass loads and stretched…
Topological rainbow trapping for elastic energy harvesting in graded SSH systems
Gregory J. Chaplain, Jacopo M. De Ponti, Giulia Aguzzi +2
We amalgamate two fundamental designs from distinct areas of wave control in physics, and place them in the setting of elasticity. Graded elastic metasurfaces, so-called metawedges…
Experimental investigation of amplification, via a mechanical delay-line, in a rainbow-based metasurface for energy harvesting
Jacopo M. De Ponti, Andrea Colombi, Emanuele Riva +4
We demonstrate that a rainbow-based metasurface, created by a graded array of resonant rods attached to an elastic beam, operates as a mechanical delay-line by slowing down surface…
Localising elastic edge waves via the topological rainbow effect
Bogdan Ungureanu, Mehul P. Makwana, Richard V. Craster +1
We combine two different fields, topological physics and graded metamaterials to design a topological metasurface to control and redirect elastic waves. We strategically design a t…