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3. Choice of materials: the master curve
The behavior of viscoelastic materials is mainly a function of frequency and temperature. Each viscoelastic material is associated with a "master curve" that gives Young's modulus and its imaginary part η (loss factor) as a function of frequency and temperature.
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Frequency response
In a typical Young's modulus vs. frequency diagram (figure 7 a), we observe two asymptotes of the modulus of rigidity E, one at low frequencies reflecting "rubbery" behavior with a low modulus, and one at high frequencies with a high value, reflecting "glassy" behavior. The two asymptotes are connected by a curve with a point of inflection around a zone known as the material's "transition zone" or viscoelastic zone.
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Choice of materials: the master curve
Characterization of viscoelastic materials and current standards
Viscoelastic materials have many applications in various fields; examples are shown in figure 1 .
Bibliography
References
Standardization
Current standards for materials testing
- Standard test methods for rubber deterioration-Dynamic fatigue - ASTM D430-06 - (2000)
- Standard test method for measuring vibration-damping properties of materials, American Society for Testing and Materials - ASTM E756-05 - (2005)
- Method for graphical presentation of the complex modulus of damping materials, UK - BS 7544 - (1991)
- Determination of the...
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