FREQUENCY DEPENDENCE OF INTERNAL ENERGY DISSIPATION IN CERTAIN POLYMERIC MATERIALS,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 02, 1969
- Accession Number
- AD0693606
Entities
People
- E. V. Poltoraus
Organizations
- National Air and Space Intelligence Center