Thermomechanical Framework for the Constitutive Modeling of Asphalt Concrete
Publication: International Journal of Geomechanics
Volume 6, Issue 1
Abstract
This study is concerned with the constitutive modeling of asphalt concrete. Unlike most constitutive models for asphalt concrete that do not take into account the evolution of the microstructure of the material, this study incorporates the evolution of the microstructure by using a framework that recognizes that a body’s natural configurations can evolve as the microstructure changes. The general framework, on which this study is based, is cast within a full thermomechanical setting. In this paper, we develop models within the context of a mechanical framework that stems from the general framework for models based on the full thermodynamic framework and the resulting equations represent a nonlinear rate type viscoelastic model. The creep and stress relaxation experiments of Monismith and Secor are used for validating the efficacy of the model, and it is found that the predictions of the theory agree very well with the available experimental results. The advantages of using such a framework are many, especially when one wants to model the diverse mechanical and thermodynamic response characteristics of asphalt and asphalt concrete.
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Acknowledgment
K.R.R. and J.M.K. thank the National Science Foundation for its support.NSF
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Information
Published In
International Journal of Geomechanics
Volume 6 • Issue 1 • January 2006
Pages: 36 - 45
Copyright
© 2006 ASCE.
History
Received: Jan 13, 2004
Accepted: Feb 22, 2005
Published online: Jan 1, 2006
Published in print: Jan 2006
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