A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
This paper investigates the crack initiation and saturation for opening-mode cracking. Using elastic governing equations and a weak form stress boundary condition, we derive an explicit solution of elastic fields in the surface course and obtain the energy release rate, so that opening-mode cracking initiation can be determined by fracture energy criterion. Interestingly, the longitudinal stress between such cracks along the surface undergoes a transition from tensile to compressive with increasing applied tensile loading, which implies crack saturation. Opening-mode cracking in asphalt pavements is studied and a two-dimensional closed-form elastic solution of one section from the periodic crack pattern is derived. Using the fracture energy criterion, the proposed model predicts the OMC initiation and saturation. For an intact asphalt pavement, there exists a threshold of mismatch deformation to induce the first OMC. The stiffer the interface, the higher the threshold mismatch deformation. Once the first crack forms, the crack spacing rapidly decreases to a certain value. Therefore, multiple OMCs may simultaneously form. The stiffer the interface, the lower the crack spacing. When crack spacing approaches a certain value, the driven force to produce a new OMC will be significantly high. An asphalt pavement with a stiff interface has a narrow crack spacing range. Given asphalt material properties and loading condition, there exists a critical thickness for the asphalt overlay, below which no OMC can initiate. Therefore, a thinner asphalt overlay may produce better performance for OMCs. Because asphalt materials exhibit viscoelastic behavior, the present elastic formulation may overly predict the OMC crack density. Future work to quantitatively evaluate the effect of the assumptions and release those assumptions is underway.
This paper investigates the crack initiation and saturation for opening-mode cracking. Using elastic governing equations and a weak form stress boundary condition, we derive an explicit solution of elastic fields in the surface course and obtain the energy release rate, so that opening-mode cracking initiation can be determined by fracture energy criterion. Interestingly, the longitudinal stress between such cracks along the surface undergoes a transition from tensile to compressive with increasing applied tensile loading, which implies crack saturation. Opening-mode cracking in asphalt pavements is studied and a two-dimensional closed-form elastic solution of one section from the periodic crack pattern is derived. Using the fracture energy criterion, the proposed model predicts the OMC initiation and saturation. For an intact asphalt pavement, there exists a threshold of mismatch deformation to induce the first OMC. The stiffer the interface, the higher the threshold mismatch deformation. Once the first crack forms, the crack spacing rapidly decreases to a certain value. Therefore, multiple OMCs may simultaneously form. The stiffer the interface, the lower the crack spacing. When crack spacing approaches a certain value, the driven force to produce a new OMC will be significantly high. An asphalt pavement with a stiff interface has a narrow crack spacing range. Given asphalt material properties and loading condition, there exists a critical thickness for the asphalt overlay, below which no OMC can initiate. Therefore, a thinner asphalt overlay may produce better performance for OMCs. Because asphalt materials exhibit viscoelastic behavior, the present elastic formulation may overly predict the OMC crack density. Future work to quantitatively evaluate the effect of the assumptions and release those assumptions is underway.
Opening-Mode Cracking in Asphalt Pavements: Crack Initiation and Saturation
H. Yin (author)
2009
26 pages
Report
No indication
English
Opening-Mode Cracking in Asphalt Pavements
| Taylor & Francis Verlag | 2010
Mechanistic-empirical models for top-down cracking initiation of asphalt pavements
| Taylor & Francis Verlag | 2020
Transverse Cracking of Asphalt Pavements
NTIS | 1982
Mechanics-based top-down fatigue cracking initiation prediction framework for asphalt pavements
| Taylor & Francis Verlag | 2015
Mechanics-based top-down fatigue cracking initiation prediction framework for asphalt pavements
| British Library Online Contents | 2015