Fracture Analysis of Semi-Circular Bending Test of Asphalt Mixtures Based on Extended Finite Element Method
Publication: Airfield and Highway Pavements 2021
ABSTRACT
A two-dimensional (2D) semi-circular bending (SCB) model was constructed with the extended finite element method (XFEM) to investigate the fracture performance of asphalt mixtures. The influence of material properties, which include the tensile strength, fracture energy, and elastic modulus, on the crack development in the I-FIT SCB configuration has been examined through the load–displacement curves. A full factorial of 64 simulation cases varying in material properties was carried out for sensitivity analysis. The simulation results showed that the crack development could be divided into four stages according to the damage evolvement. In addition, it was found that stiffer modulus results in higher peak load and steeper slope of curve. Tensile strength showed a noticeable effect on the peak load, while the fracture energy was highly related with the area under curve after peak load. Linear regression equations have been established between material properties and load–displacement curve parameters.
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Airfield and Highway Pavements 2021
Pages: 80 - 91
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© 2021 American Society of Civil Engineers.
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Published online: Jun 4, 2021
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