Plasty - Stanovení dynamických mechanických vlastností - Část 3: Ohybové kmity - Metoda rezonanční křivky (Norma k přímému použití jako ČSN).

The information about the standard:

Designation standards: ČSN EN ISO 6721-3
Classification mark: 640615
Catalog number: 512595
Publication date standards: 1.9.2021
The number of pages: 24
Approximate weight : 72 g (0.16 lbs)
Country: Czech technical standard
Kategorie: Technické normy ČSN

Annotation of standard text ČSN EN ISO 6721-3 (640615):

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