Accession Number : AD0703657

Title :   LATTICE THEORY OF FACE-SHEAR AND THICKNESS-TWIST WAVES IN FACE-CENTERED CUBIC CRYSTAL PLATES.

Descriptive Note : Technical rept.,

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

Personal Author(s) : Brady,Kevin James

Report Date : DEC 1969

Pagination or Media Count : 54

Abstract : Finite difference equations of motion of the sixth order and the associated boundary conditions for principal planes are formulated for a face-centered cubic lattice of mass particles. The equations are solved for face-shear and thickness-twist waves in a plate with free faces. Computations of mode-shapes and the frequency spectrum are presented for copper and the results are compared with a previous solution for a simple cubic material and with the solution of the classical equations of elasticity. (Author)

Descriptors :   (*METAL PLATES, MECHANICAL WAVES), (*COPPER, ELASTIC PROPERTIES), SHEAR STRESSES, CONTINUUM MECHANICS, BRILLOUIN ZONES, EQUATIONS OF MOTION, BOUNDARY VALUE PROBLEMS, DIFFERENCE EQUATIONS, NUMERICAL INTEGRATION

Subject Categories : Mechanics
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE