| Autor: |
M. Kh. Shorshorov, A. N. Kachevsky |
| Rok vydání: |
1991 |
| Předmět: |
|
| Zdroj: |
MICC 90 ISBN: 9781851666485 |
| DOI: |
10.1007/978-94-011-3676-1_107 |
| Popis: |
The principle of the mechanical oscillation damping mechanism is discussed here on the basis of the experimental results of studying the internal friction in fibrous and dispersion-strengthened aluminum-alloy-base composite materials, as well as in those strengthened by filamentary crystals. Attention is paid to the analytical connection of the internal friction in a unidirectional fibrous composite material with the elastic and inelastic properties of its components, with their content by volume in conditions of torsional and flexural vibrations. This idea is substantiated by the calculated temperature spectrum of the internal friction featured by fibrous boron-aluminum, carbon-aluminum and glass-filled polyacetals. The studies show that the damping properties of the composites are first of all determined by the superposition of the relaxation processes in the components. The contribution made by incoherent interphase partition boundaries to the mechanical vibration damping becomes considerable in case of poor bonds between the components, causing the sliding friction, and during diffusion processes that develop at high temperatures. The deformation of the composite matrix caused by thermal strain results in an increased damping capability of the material as well. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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