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- Title
Formulation of stress intensity factor under pure bending condition in multilayer pavements using numerical study and model tree approach.
- Authors
Sarbijan, Majid Jebalbarezi; Asadi, Saeid; Hamze‐Ziabari, Seyed Mahmood
- Abstract
The tensile deformation of top‐down cracks significantly influences pavement delamination. Accurately formulating the stress intensity factor (SIF) is crucial for assessing the stress/strain near crack tips. In the present study, a robust data mining method called M5´ is employed to formulate the SIF induced by pure bending in a multilayer pavement. A comprehensive database is generated through two‐dimensional finite element analysis to train the M5' model. Several key parameters pertaining to asphalt and base layers are incorporated into the formulation. A comparative analysis is conducted to evaluate the performance of the developed model against traditional regression methods. A comparison of the developed model with other existing methods confirms its superior performance. Additionally, a parametric study validates the robustness of the developed model in capturing fundamental concepts of fracture mechanics. Finally, a sensitivity analysis is performed to determine the most critical parameters in the development of a predictive model for SIF. Highlights: The mode I stress intensity factor of top‐down cracks is computed for various conditions.The MNLR, MLR, and M5´ methods are used to formulate the mode I SIF of top‐down cracks.The fatigue life of the asphalt pavement is assessed using Paris' law.The thickness of the HMA layer is the most critical parameter in predicting SIF.
- Subjects
PARIS (France); PAVEMENTS; ASPHALT pavements; FRACTURE mechanics; FINITE element method; FATIGUE life
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2024, Vol 47, Issue 7, p2506
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.14314