Abstract
A generalized theory for the viscoelastic behavior of bitumen is presented. The mathematical model incorporates strain rate and temperature dependency as well as nonmonotonic loading and unloading with shape recovery. The model is phenomenological in nature. It can be calibrated using a relatively limited set of experimental parameters that are obtainable by uniaxial tests. It is shown that the mathematical model can be represented as a special nonlinear form of the Burgers model. This facilitates the derivation of numerical algorithms for solving the constitutive equations. A numerical scheme is implemented in a customized material model subroutine in a finite-element analysis (FEA) program. Simulation results are compared with the results of uniaxial and indentation tests on bitumen.
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Acknowledgments
The authors are very grateful to Dr. Vikram Deshpande for his generous assistance with the ABAQUS implementation.
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Published In
Journal of Engineering Mechanics
Volume 141 • Issue 5 • May 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 20, 2010
Accepted: Jan 22, 2014
Published online: Oct 17, 2014
Published in print: May 1, 2015
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