Simulation of Creep Damage of Asphalt Mixture Based on Discrete Element Method
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 7
Abstract
This paper proposes a creative approach for conducting discrete element simulation of creep tests to simulate the mechanical behavior of asphalt mixture and analyze the mechanism of creep damage by virtual tests. Based on the discrete element method (DEM), the creative approach named the aggregate template method was presented to generate the irregular polyhedron of coarse aggregate by 3DsMax and . The asphalt mortar was then replaced by spherical particles and by . Based on the above preparation, the uniaxial creep tests were simulated by and verified by actual tests to illuminate the micromechanical behavior and the creep damage of asphalt mixtures. The test results indicate that the fracture of force chains is consistent with the damage of real samples. The load is used to damage the sample by breaking the bond between the particles and the temperature is used to soften the asphalt mortar particles to damage the sample. The attenuation rate of the cohesive force of particles at the boundary of the sample is obviously larger than that at the center in the process of loading. It was verified that the aggregate template method in DEM is a reasonable approach for studying the creep test of asphalt mixtures by error analysis.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The research was supported by the National Key R&D Program of China (Grant No. 2021YFB2600900); the National Natural Science Foundation of China (Grant No. 52178411); Changsha Natural Science Foundation of China (Grant No. kq2202205); Hunan Transportation Department (Grant Nos. 201825 and B202112); and the Research Innovation Project of Changsha University of Science and Technology (Grant No. CX2021SS121).
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 7 • July 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jun 18, 2022
Accepted: Nov 11, 2022
Published online: Apr 25, 2023
Published in print: Jul 1, 2023
Discussion open until: Sep 25, 2023
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