Accession Number : AD0780244

Title :   Electromagnetic Radiation from a Vibrating Elastic Sphere.

Descriptive Note : Technical rept.,

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

Personal Author(s) : Mindlin,R. D.

Report Date : JAN 1974

Pagination or Media Count : 21

Abstract : When the contribution of the polarization gradient to the stored energy is taken into account, in the theory of elastic dielectrics, there is a small coupling between electromagnetic and elastic energies even in isotropic materials. It is found that the electromagnetic radiation from an isotropic, elastic, dielectric sphere vibrating in its fundamental rotatory mode, with a maximum shear strain of 0.001, is of the order of 10 to the minus 38th power watts - independent of the radius of the sphere and proportional to the square of the strain. (Author)

Descriptors :   *Dielectrics, *Vibration, *Electromagnetic radiation, Boundary value problems, Equations of motion, Sodium chloride, Mechanical properties, Electrical properties

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE