Peridynamics-based simulation of asphalt mixture cracking in semi-circular bending (SCB) test
Highlights
- Peridynamics model was applied to simulate SCB testing for asphalt mixtures.
- Cracking patterns in simulation match lab observations well.
- Fracture energy and P-u curve from simulation agrees with experimental results.
- Arch effect and energy transformation during SCB testing were investigated.
Background
- Low temperature cracking is the most prevalent pavement distress especially in cold area
- Existing simulation method has limitation in analyzing the mechanism of pavement cracking
- Peridynamics has the advantage of uniform description on continuous and discontinuous materials
Goals
- Apply peridynamic theory in pavement cracking simulation and Validate its applicability
- Reveal the cracking mechanism of asphalt mixtures in SCB test, especially the energy distribution for fracture
Method
Procedure
Peridynamics theory
Experiment
Simulation
Featured results
Conclusions
- Peridynamics simulation is reasonable, applicable and reliable in the analysis of asphalt cracking.
- Arch effect in the specimen was observed, which strengthened the resistance to loading and caused the two peaks in P-u curve with cracking decreasing the resistance.
- Energy transformation in the whole process can be divided into four stages. Calculation energy in the way which was recommended by AASHTO TP 105 is close to real total fracture energy in the end.
- Fatigue cracking and state based peridynamics to be considered.
Publication
Liu, W., K. Yan, J. Q. Li*, and S. Yang. 2021. “Peridynamics-based simulation of semi-circular bending (SCB) testing.” Construction and Building Materials, 268: 121190. https://doi.org/10/gj74d8.
Acknowledgement
The research was conducted beginning at Wenyao’s master degree in Hunan University in the guidance of Dr. Kezhen Yan and Shu Yang. It was furthered at Oklahoma State University under the guiduance of Dr. Qiang Li.
