Accession Number : AD0715664

Title :   Lattice Theory of Face-Shear and Thickness-Twist Waves in Body-Centered Cubic Crystal Plates.

Descriptive Note : Research rept.,

Corporate Author : COLUMBIA UNIV NEW YORK DEPT OF CIVIL ENGINEERING AND ENGINEERING MECHANICS

Personal Author(s) : Gong,Chung

Report Date : OCT 1970

Pagination or Media Count : 86

Abstract : An analytical study is made of face-shear and thickness-twist waves propagating along the (100) and (110) directions of a body-centered cubic 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 face-centered cubic plates. In the (100) direction of the body-centered cubic 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. (Author)

Descriptors :   (*MECHANICAL WAVES, WAVE PROPAGATION), (*METAL PLATES, SHEAR STRESSES), IRON, TUNGSTEN, BRILLOUIN ZONES, EQUATIONS OF MOTION, VIBRATION

Subject Categories : Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE