Plastics - Determination of dynamic mechanical properties - Part 3: Flexural vibration - Resonance-curve method
NORM herausgegeben am 1.9.2021
Bezeichnung normen: ČSN EN ISO 6721-3
Zeichen: 640615
Katalog-Nummer: 512595
Ausgabedatum normen: 1.9.2021
Zahl der Seiten: 24
Gewicht ca.: 72 g (0.16 Pfund)
Land: Tschechische technische Norm
Kategorie: Technische Normen ČSN
This document specifies a bending-vibration method based upon resonance curves for determining the flexural complex modulus Ef* of homogeneous plastics and the damping properties of laminated plastics intended for acoustic insulation, for example systems consisting of a metal sheet coated with a damping plastic layer, or sandwich systems consisting of two sheet-metal layers with an intermediate plastic layer. For many purposes, it is useful to determine these properties as a function of temperature and frequency