NDLI: Continuous relaxation and retardation spectrum method for viscoelastic characterization of asphalt concrete

Content Provider	Springer Nature Link
Author	Bhattacharjee, Sudip Swamy, Aravind Krishna Daniel, Jo S.
Copyright Year	2011
Abstract	This paper presents a simple and practical approach to obtain the continuous relaxation and retardation spectra of asphalt concrete directly from the complex (dynamic) modulus test data. The spectra thus obtained are continuous functions of relaxation and retardation time. The major advantage of this method is that the continuous form is directly obtained from the master curves which are readily available from the standard characterization tests of linearly viscoelastic behavior of asphalt concrete. The continuous spectrum method offers efficient alternative to the numerical computation of discrete spectra and can be easily used for modeling viscoelastic behavior. In this research, asphalt concrete specimens have been tested for linearly viscoelastic characterization. The linearly viscoelastic test data have been used to develop storage modulus and storage compliance master curves. The continuous spectra are obtained from the fitted sigmoid function of the master curves via the inverse integral transform. The continuous spectra are shown to be the limiting case of the discrete distributions. The continuous spectra and the time-domain viscoelastic functions (relaxation modulus and creep compliance) computed from the spectra matched very well with the approximate solutions. It is observed that the shape of the spectra is dependent on the master curve parameters. The continuous spectra thus obtained can easily be implemented in material mix design process. Prony-series coefficients can be easily obtained from the continuous spectra and used in numerical analysis such as finite element analysis.
Starting Page	287
Ending Page	305
Page Count	19
File Format	PDF
ISSN	13852000
Journal	Mechanics of Time-Dependent Materials
Volume Number	16
Issue Number	3
e-ISSN	15732738
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-11-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Complex modulus Continuous spectrum Relaxation Retardation Integral transform Master curve Mechanics Continuum Mechanics and Mechanics of Materials Polymer Sciences Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Materials Science Chemical Engineering Mechanical Engineering Aerospace Engineering

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