Accession Number : AD0693606

Title :   FREQUENCY DEPENDENCE OF INTERNAL ENERGY DISSIPATION IN CERTAIN POLYMERIC MATERIALS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Poltoraus,E. V.

Report Date : 02 JUN 1969

Pagination or Media Count : 12

Abstract : The influence of the frequency of oscillations (6.8-55.1 Hz) on the logarithmic decrement of oscillations of organic glass, caprone, polypropylene, low and high pressure polyethylene, VFT-S and STK-1 glass textolite, glass fiber anisotropic SVAM 10:1 material, and foam plastic PS-4 was investigated. Experiments were carried out using the method of free damped oscillations of cantilever samples during transverse bending deformations. The oscillation frequency was changed by increasing or decreasing the mass of auxiliary attachments which could be securely mounted at the free end of the sample. The oscillation decrement of the majority of the plastics (organic glass, polyethylene, caprone) increases with the decrease in frequency. Experiments carried out using hard plastics-glass textolite and SVAM 10:1 did not exhibit a frequency dependence. (Author)

Descriptors :   (*PLASTICS, *INTERNAL FRICTION), POLYMERS, DEFORMATION, VIBRATION, DAMPING, GLASS, USSR, POLYAMIDE PLASTICS, POLYETHYLENE PLASTICS, REINFORCED PLASTICS, EXPANDED PLASTICS

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE