We determine the distribution of phonon and phason displacements around the tip of a crack in Al–Pb–Mn quasicrystals. We find an increment of phason activity, due to crystal substructural changes, around the crack. A transfer of energy from the macroscopic level to the phason one and vice versa, as a consequence of phonon–phason coupling, influences the force driving the crack tip. Finally, we interpret the scattering of data about the phonon–phason coupling coefficient from a random point of view considering such a coupling as a stochastic field over the body.
Phason effects around a crack in Al-Pb-Mn quasicrystals: stochastic aspects of the phonon-phason coupling / Paolo Maria Mariano; Furio Lorenzo Stazi; Giuliano Augusti. - In: COMPUTERS & STRUCTURES. - ISSN 0045-7949. - STAMPA. - 82:(2004), pp. 971-983. [10.1016/j.compstruc.2004.03.017]
Phason effects around a crack in Al-Pb-Mn quasicrystals: stochastic aspects of the phonon-phason coupling
Paolo Maria Mariano
;
2004
Abstract
We determine the distribution of phonon and phason displacements around the tip of a crack in Al–Pb–Mn quasicrystals. We find an increment of phason activity, due to crystal substructural changes, around the crack. A transfer of energy from the macroscopic level to the phason one and vice versa, as a consequence of phonon–phason coupling, influences the force driving the crack tip. Finally, we interpret the scattering of data about the phonon–phason coupling coefficient from a random point of view considering such a coupling as a stochastic field over the body.File | Dimensione | Formato | |
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