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Computers and Concrete Volume 13, Number 4, April 2014 , pages 569-585 DOI: https://doi.org/10.12989/cac.2014.13.4.569 |
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Three-dimensional finite element modeling of a transverse top-down crack in asphalt concrete |
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Majid R. Ayatollahi, Sadjad Pirmohammad and Karo Sedighiani
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| Abstract | ||
| In this paper, a four-layer road structure consisting of an edge transverse crack is simulated using three-dimensional finite element method in order to capture the influence of a single-axle wheel load on the crack propagation through the asphalt concrete layer. Different positions of the vehicular load relative to the cracked area are considered in the analyses. Linear elastic fracture mechanics (LEFM) is used for investigating the effect of the traffic load on the behavior of a crack propagating within the asphalt concrete. The results obtained show that the crack front experiences all three modes of deformation i.e. mode I, mode II and mode III, and the corresponding stress intensity factors are highly affected by the crack geometry and the vehicle position. The results also show that for many loading situations, the contribution of shear deformation (due to mode II and mode III loading) is considerable. | ||
| Key Words | ||
| edge transverse crack; 3D finite element modeling; stress intensity factor; asphalt concrete; traffic load | ||
| Address | ||
| Majid R. Ayatollahi, Sadjad Pirmohammad and Karo Sedighiani: Fatigue and Fracture Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, 16846, Iran | ||