Elastic interfacial waves in discrete and continuous media

Article

关键词: EMBEDDED-ATOM METHOD;    GRAIN-BOUNDARIES;    TILT BOUNDARIES;    METALS;    SURFACE;    MODES;    COMPOSITES;    PHONONS;   

DOI  :  10.1103/PhysRevB.53.8398

来源: SCIE

【 摘 要 】

Phonon spectra of bicrystals with relaxed grain-boundary structure display a variety of localized modes including long-wavelength acoustic modes. Continuum solutions for localized waves that incorporate atomic-level elastic properties of the interface via discontinuity relations agree well with the latter modes. In contrast, classical solutions that depend only on bulk elastic properties do not. This demonstrates that the distinct atomic structure of the interface is a controlling factor, and it is shown how local, atomic-level properties can be incorporated into continuum analyses of interfacial phenomena.

【 授权许可】

Free