XIX. ULUSAL MEKANİK KONGRESİ , Trabzon, Türkiye, 24 - 28 Ağustos 2015, cilt.1, sa.1, ss.826-837
In this study, torsional vibration of three-layered hollow sphere whose materials of upper and
lower layers are homogeneous and isotropic and that of mid-layer is isotropic and functionally
graded one, is investigated with utilizing discrete-analytical method within the three
dimensional exact equations of elastodynamics. It is supposed that perfect contact conditions
are valid on interfaces between the layers