Abstract
An analytical study is made of face-shear and thickness-twist waves propagating along the [100] and [110] directions of a b.c.c. lattice plate bounded by a pair of (001) surfaces. The behavior of the waves in the [110] direction is similar to that found previously for analogous waves in the [100] direction of simple-cubic and f.c.c. plates. In the [100] direction of the b.c.c. plate, the situation is quite different. Near the halfway point of the first Brillouin zone, the lowest symmetric mode and the lowest antisymmetric mode are predominantly surface modes and the remaining modes group together in a narrow, high frequency band-pass. The results of numerical computations are exhibited for iron and tungsten.
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