Loading…
This event has ended. Visit the official site or create your own event on Sched.
Welcome to ICSV26!
Back To Schedule
Monday, July 8 • 16:50 - 17:10
ON CONTINUUM MODELLING OF WAVE PROPAGATION IN HEXAGONAL LATTICES.

Log in to save this to your schedule, view media, leave feedback and see who's attending!

Feedback form is now closed.
Wave propagation in hexagonal lattices is characterised by a transition from isotropic to anisotropic regime as the frequency increases. This feature cannot be observed when the lattice material is modelled within the framework of classic Cauchy theory of elasticity, except when the real geometry of the microstructure is explicitly described. Homogenized equivalent continua can capture the onset of this anisotropy only if tensors involved in the constitutive law are at least of order six. This requirement is met in the case of Strain-Gradient Elasticity (SGE). In this work the SGE model is calibrated to quantitatively describe wave propagation within hexagonal lattices in a sufficiently large region of the dispersion diagram, by fitting the dispersion relations obtained from a Bloch-Floquet analysis on the unit cell. It is then shown that focussing and beam steering effects can be obtained by acting only on the local material orientation of the hexagonal lattice. This is achieved by computing the Poynting vector in the SGE model and optimising the distribution of material orientation.

Moderators
PB

Pierre Belanger

Professor, Pierre Belanger

Authors

Monday July 8, 2019 16:50 - 17:10 EDT
Westmount 1

Attendees (8)