Über die Temperaturabhängigkeit schwingungsdämpfender Kunststoffe
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
E″max/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.
The maximum energy dissipation is decreasing with increasing temperature band width. This relation is approximately described by
E″max/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.
Document Type: Research Article
Publication date: 01 January 1961
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