Accession Number : ADA293544

Title :   Poisson's Ratio for Tetragonal Crystals.

Descriptive Note : Technical rept.,

Corporate Author : ARMY RESEARCH LAB FORT MONMOUTH NJ

Personal Author(s) : Ballato, Arthur

PDF Url : ADA293544

Report Date : MAR 1995

Pagination or Media Count : 13

Abstract : General expressions for Poisson's ratio are derived for tetragonal crystals; simplified forms are given for cases involving symmetry directions. Poisson's ratio, v, is defined for isotropic media as the quotient of lateral contraction to longitudinal extension arising from application of a simple tensile stress; in most materials, this dimensionless number is positive. In crystals, v takes on different values, depending on the directions of stress and strain chosen. The ratio finds application in a variety of areas of applied elasticity and solid mechanics, for example, as indication of the mechanical coupling between various vibrational modes of motion. jg

Descriptors :   *POISSON RATIO, RATIOS, VIBRATION, COMPOSITE MATERIALS, TENSILE STRESS, ELASTIC PROPERTIES, MOTION, ORIENTATION(DIRECTION), CRYSTALS, SOLIDS, MECHANICS, ISOTROPISM, SYMMETRY, MEDIA.

Subject Categories : Crystallography
      Laminates and Composite Materials
      Mechanics
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE