부산대학교 도서관

We design a cloak for surface Rayleigh and Love waves. To such purpose we utilize the invariance of the Navier elastodynamic equation under geometric transform by assuming identical displacements in original and transformed media (Cosserat gauge). In particular, we apply transformation elastodynamics to obtain the requisite mechanical properties for a 3-D cylindrical carpet cloak with a triangular cross section. Dispersion analysis and time-harmonic simulations are conducted to validate the performance of the cloak characterized by an elasticity tensor without the minor symmetries (Cosserat medium). Finally, symmetrization techniques of the elasticity tensor are applied in order to approximate the anisotropic and chiral properties of the cloak with isotropic Cauchy materials.