BS 7544:1991

Committees responsible
National foreword
Method
Introduction
1 Scope
2 Nomenclature
3 Graphical presentation
Annex
A Bibliography
Tables
1 Complex modulus data
2 Complex modulus data as a function of temperature
   and frequency
3 Example of analytical representation of the
   temperature shift function
4 Example of analytical representation of the complex
   modulus
Figures
1 Data quality check
2 Temperature shift function and its properties
3 Complex modulus reduced frequency plot
4 complex modulus inverted-"U" plot

Establishes graphical presentation of the complex modulus of viscoelastic vibration damping materials, which are macroscopically homogeneous, linear, and thermorheologically simple.

This International Standard establishes the graphical presentation of the complex modulus of viscoelastic vibration damping materials which are macroscopically homogeneous, linear and thermorheologically simple. The complex modulus may be the shear modulus, Young’s modulus, bulk modulus, longitudinal wave propagation modulus, or Lamé modulus. This graphical presentation is convenient and sufficiently accurate for many vibration damping materials.

The preferred nomenclature (parameters, symbols and definitions) is also given.

The primary purpose of this International Standard is to improve communication among the diverse technological fields concerned with vibration damping materials.