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Über die Temperaturabhängigkeit schwingungsdämpfender Kunststoffe

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Highly damped sheet metal constructions are obtained by coating metal sheets with damping material or by sandwich or similar constructions. Most of the highly effective damping substances in use are amorphous viscoelastic plastics with or without filler; these substances are made to meet the technical requirements with respect to position and width of the temperature ranges with optimum damping.

The maximum energy dissipation is decreasing with increasing temperature band width. This relation is approximately described by

Emax/E ΔT ≈ 6 °K, ΔT in °K;

with E″max maximum of imaginary part of Young's modulus at an arbitrary frequency within the range of interest, E Young's modulus at very high frequencies (almost equal to Young's modulus below the glass transition), ΔT half width of E″ as function of the temperature at a given frequency.

For sheet metal with damping coating of usual thickness this relation also describes the reduction of the damping of the combined system with increasing band width.
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Document Type: Research Article

Publication date: January 1, 1961

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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