Published Online: 20 JUL 2012
Copyright © 2011 John Wiley & Sons, Inc. All rights reserved.
Wiley Encyclopedia of Composites
How to Cite
Miyano, Y. 2012. Viscoelastic Behavior. Wiley Encyclopedia of Composites. 1–7.
- Published Online: 20 JUL 2012
Mechanical properties of polymers markedly change with time and temperature, exhibiting what is called viscoelastic behavior. Composite materials containing a polymer as their matrix are likewise expected to display viscoelastic behavior. The viscoelasticity of a polymer is explained by the use of a dynamic model, with mention being made of creep and relaxation, both of which are kinds of viscoelastic behavior, and also of the time—temperature superposition principle. Then, on the basis of this explanation, the viscoelasticity of composite materials is described using the simple rule of mixtures. Time and temperature dependence observed in relation to the mechanical behavior and fracture phenomenon of polymer-based composites is then explained, referring to a specific example of unidirectional carbon-fiber-reinforced plastic (CFRP).
- Time-temperature superposition principle;
- Time and temperature dependence;
- Long-term life;