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Open AccessArticle

Viscoelastic Behaviour from Complementary Forced-Oscillation and Microcreep Tests

Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia
Minerals 2019, 9(12), 721; https://doi.org/10.3390/min9120721
Received: 12 October 2019 / Revised: 18 November 2019 / Accepted: 19 November 2019 / Published: 21 November 2019
(This article belongs to the Special Issue Mineral Physics—In Memory of Orson Anderson)
There is an important complementarity between experimental methods for the study of high-temperature viscoelasticity in the time and frequency domains that has not always been fully exploited. Here, we show that the parallel processing of forced-oscillation data and microcreep records, involving the consistent use of either Andrade or extended Burgers creep function models, yields a robust composite modulus-dissipation dataset spanning a broader range of periods than either technique alone. In fitting this dataset, the alternative Andrade and extended Burgers models differ in their partitioning of strain between the anelastic and viscous contributions. The extended Burgers model is preferred because it involves a finite range of anelastic relaxation times and, accordingly, a well-defined anelastic relaxation strength. The new strategy offers the prospect of better constraining the transition between transient and steady-state creep or, equivalently, between anelastic and viscous behaviour. View Full-Text
Keywords: viscoelasticity; anelasticity; creep function; forced-oscillation methods; microcreep methods viscoelasticity; anelasticity; creep function; forced-oscillation methods; microcreep methods
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Jackson, I. Viscoelastic Behaviour from Complementary Forced-Oscillation and Microcreep Tests. Minerals 2019, 9, 721.

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