Accession Number : AD0478019


Title :   INITIAL STRESSES AND SKIN EFFECTS IN A HEMITROPIC COSSERAT CONTINUUM.


Descriptive Note : Technical rept.,


Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF ENGINEERING MECHANICS


Personal Author(s) : Weitsman,Yechiel


Report Date : Feb 1966


Pagination or Media Count : 22


Abstract : Constitutive relations are derived for a linear Cosserat continuum possessing hemitropic symmetry. In such a continuum the microstructure has a screw-like property, or handedness, and can support initial couple-stresses of twist. The introduction of free boundaries in such a medium brings about an unbalancing of the internal forces which results in a highly localized skin effect. This skin effect is represented by an outward, or inward, motion of a boundary layer, which is accompanied by micro-twisting. A qualitative comparison is obtained with a specific solution based upon the linear elastic dislocation theory. (Author)


Descriptors :   *HYDRODYNAMICS , ELASTIC PROPERTIES , SURFACE TENSION , SKIN FRICTION , BOUNDARY LAYER , SURFACE PROPERTIES , MARINE PROPELLERS , MATHEMATICAL ANALYSIS , STRUCTURES , DEFORMATION , ROTATION , VORTICES , TORQUE


Subject Categories : Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE