Wednesday, July 21, 2010

Ageless time; time-temperature-age superposition

Ageless. Having existed for so great a period of time that its longevity cannot be expressed.

In an upcoming book chapter [1], I use this term, ageless time, as an alternative to the term used by Struik, effective time, because the former conveys better the idea of "the time elapsed while observing (testing) a material that is so old (ageless) that physical aging has virtually stopped."

[1] E. J. Barbero, Time-temperature-age Superposition Principle and its Application to Linear Viscoelastic Materials, Ch. 2 in Creep and Fatigue in Polymer Matrix Composites, M. Guedes (Ed.), Woodhead Publishing Co., 2010.

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