Repository logo
 

Oscillations and damping in the fractional Maxwell materials

Published version
Peer-reviewed

Change log

Authors

Pritchard, RH 
Terentjev, EM 

Abstract

This paper examines the oscillatory behavior of complex viscoelastic systems with power law like relaxation behavior. Specifically, we use the fractional Maxwell model, consisting of a spring and fractional dashpot in series, which produces a power-law creep behavior and a relaxation law following the Mittag-Leffler function. The fractional dashpot is characterized by a parameter β , continuously moving from the pure viscous behavior when β = 1 to the purely elastic response when β  = 0. In this work, we study the general response function and focus on the oscillatory behavior of a fractional Maxwell system in four regimes: Stress impulse, strain impulse, step stress, and driven oscillations. The solutions are presented in a format analogous to the classical oscillator, showing how the fractional nature of relaxation changes the long-time equilibrium behavior and the short-time transient solutions. We specifically test the critical damping conditions in the fractional regime, since these have a particular relevance in biomechanics.

Description

Keywords

4012 Fluid Mechanics and Thermal Engineering, 40 Engineering, Behavioral and Social Science

Journal Title

Journal of Rheology

Conference Name

Journal ISSN

0148-6055
1520-8516

Volume Title

61

Publisher

American Institute of Physics
Sponsorship
Engineering and Physical Sciences Research Council (EP/J017639/1)
This research was supported by the EPSRC Critical Mass Grant for Cambridge Theoretical Condensed Matter (EP/J017639).