Accession Number : AD0435610


Title :   VIBRATION OF SPHERE FOR DETERMINING THE DILATATIONAL CONSTANTS OF VISCO-ELASTIC MATERIALS,


Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H


Personal Author(s) : Lee,Tung-Ming


Report Date : Feb 1964


Pagination or Media Count : 13


Abstract : The forced vibration probjlem of a finite sphere with an exciting source embedded inside it was treated. The source is assumed to oscillate sinusoidally and the complex dilatational modulus is used to describe the motion inside the sphere. If the outer surface of the sphere is restrained from radial displacement, the ratio of the amplitude of a mid-point to the amplitude of a point on the exciting source could be used as an indication of the dilatational properties of the sphere. From the criterion of maximum amplitude ratio in conjunction with the frequency, the dilatational properties of a testing material can be determined. This method can be applied to visco-elastic fluids as well as solids. (Author)


Descriptors :   *VISCOELASTICITY , *FLUID MECHANICS , MATERIALS , DYNAMICS , STRAIN(MECHANICS) , STRESSES , EQUATIONS , WAVE PROPAGATION , PROPAGATION , MATHEMATICAL ANALYSIS , WAVE FUNCTIONS


Distribution Statement : APPROVED FOR PUBLIC RELEASE