Chapter
May 22, 2014
A Residual Thermal Stress Calculation of Asphalt Based on a Coupled Viscoelastic Phase-Field and Navier-Stokes System
Authors: Yue Hou [email protected], Linbing Wang [email protected], and Wenjuan Sun [email protected]Author Affiliations
Publication: Pavement Materials, Structures, and Performance
Abstract
The residual thermal stress in asphalt due to temperature fluctuations greatly affects pavement stability and service life of pavement structures. In this paper, a coupled viscoelastic phase-field and Navier-Stokes system for the residual thermal stress in asphalt binder is developed. We simplify the asphalt binder to two compositions, resin and oil. The phase separation is modeled by the conserved Cahn-Hilliard dynamics, which is coupled with the fluid module in COMSOL commercial software. In order to capture the deforming interface, a self-adaptive mesh is employed for the finite element calculations. The numerical results show that the phase separation phenomenon has a significant influence on the residual thermal stress and leads to a non-uniform stress distribution in the system. Furthermore, stress concentration is observed at microstructure boundaries.
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Copyright
© 2014 American Society of Civil Engineers.
History
Published online: May 22, 2014
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ASCE Technical Topics:
- Asphalt pavements
- Binders (material)
- Coupling
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Equations (by type)
- Infrastructure
- Materials characterization
- Materials engineering
- Mathematics
- Navier-Stokes equations
- Pavements
- Residual stress
- Rheology
- Stress (by type)
- Structural analysis
- Structural engineering
- Structural members
- Structural systems
- Thermal loads
- Thermal properties
- Thermodynamics
- Transportation engineering
- Viscoelasticity
Authors
Affiliations
Graduate Research Assistant, The Charles E. Via, Jr. Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, VA 24061, USA. E-mail: [email protected]
Professor, The Charles E. Via, Jr. Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, VA 24061, USA. E-mail: [email protected]
Graduate Research Assistant, The Charles E. Via, Jr. Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, VA 24061, USA. E-mail: [email protected]
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