Diffuse Interface Model to Investigate the Asphalt Concrete Cracking Subjected to Shear Loading at Low Temperature
Publication: Journal of Cold Regions Engineering
Volume 31, Issue 2
Abstract
In this paper, a diffuse interface model, namely, the phase-field model (PFM) is proposed to model asphalt concrete cracking subjected to shear loading (Mode II) at low temperature. This method describes the microstructure of asphalt concrete using a phase-field variable. To account for the growth of cracks, a nonconserved Allen-Cahn equation is adopted to evolve the phase-field variable. The whole PFM system is implemented and solved in a finite-element software program. The simulation results are then validated by semicircular bending (SCB) tests at and four-point bending tests at . It is discovered that PFM simulations of crack initiation and propagation in asphalt concrete at low temperature agree very well with the experimental results.
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Acknowledgments
The first author would like to express his sincere gratitude to Dr. Lei Zhang at Research Institute of Highways, Ministry of Transport, China for sharing the X-ray CT image. The research performed in this paper is supported by National Natural Science Foundation of China (No. 41372320), Natural Science Foundation of Shandong Province (ZR2015EQ009), and Fundamental Research Funds for the Central Universities (06500036).
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Information & Authors
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Published In
Journal of Cold Regions Engineering
Volume 31 • Issue 2 • June 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Apr 15, 2015
Accepted: Aug 9, 2016
Published online: Oct 24, 2016
Discussion open until: Mar 24, 2017
Published in print: Jun 1, 2017
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