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Monday, July 8 • 11:00 - 13:30
TOTAL ABSORPTION BY CRITICAL COUPLING FOR EDGES IN VISCO-ELASTIC PLATES

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Lamb wave propagations in a semi-infinite plate and scatterings by free edges have important practical applications, such as non-destructive inspections in aircraft wings and underwater submarine hulls, and damping of unwanted vibrations, etc.. Real or complex resonances and associated localized modes occur when free edges are pr sent. The reflections and (resonant) scatterings at and near these resonant frequencies might play important roles in the aforementioned applications. In this work, we study the absorption of the edge in a homogeneous, isotropic semi-infinite visco-elastic plate when the symmetric S0 mode is incident. Using critical coupling, we show that by adding a small part of the loss in the elastic plate, total absorption by the free edge can be realized.


Monday July 8, 2019 11:00 - 13:30 EDT
St-Laurent 3, Board 12-B
  T08 Mat. for noise & vibr. cntrl., SS01 Pasv snd absorb & insul mtrl