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Viscoelastic Behavior

  1. Yasushi Miyano

Published Online: 20 JUL 2012

DOI: 10.1002/9781118097298.weoc260

Wiley Encyclopedia of Composites

Wiley Encyclopedia of Composites

How to Cite

Miyano, Y. 2012. Viscoelastic Behavior. Wiley Encyclopedia of Composites. 1–7.

Author Information

  1. Kanazawa Institute of Technology, Hakusan Ishikawa, Japan

Publication History

  1. Published Online: 20 JUL 2012

Abstract

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).

Keywords:

  • Viscoelasticity;
  • Polymer;
  • Time-temperature superposition principle;
  • Time and temperature dependence;
  • Long-term life;
  • Durability