Numerical Analysis of Permanent Deformation Increment in Flexible Pavement Based on Tire–Pavement Contact

Tire-pavement contact stress varies with tire loading conditions and tire rolling conditions, but how the change of tire-pavement contact stress affects the permanent deformation is seldom studied. In this study, the effect of tire-pavement contact stress on permanent deformation increment in flexible pavement is investigated by finite element (FE) method. To compute the permanent deformation increment, the tire-pavement interaction is decoupled into two steps. In the first step, a hyperelastic tire model for heavy truck dual-tire assembly is developed, and the tire-pavement contact stress is obtained by Arbitrary Lagrangian Eulerian (ALE) method. The flexible pavement is simplified as a rigid body in this step. In the second step, a viscoelastic flexible pavement model is developed. A strategy is proposed to apply the tire-pavement contact stress, calculated in the first step, to the flexible pavement model as a moving surface traction. The permanent deformation increment is obtained after the tire-pavement stress moves through the flexible pavement model. Finally, the effect of tire load, inflation pressure, torque and the slip angle on permanent deformation increment is studied. The results indicate that, vertical permanent deformation increment is mainly affected by tire load. The other factors (inflation pressure, torque and slip angle) mainly affect the horizontal (longitudinal and transverse) permanent deformation increment. At accelerating, braking and cornering conditions, the horizontal permanent deformation increment is at the same level with vertical permanent deformation increment, so the horizontal permanent deformation increment is also noteworthy in pavement engineering.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFD80 Standing Committee on Pavement Structural Modeling and Evaluation.
• Authors:
  • Yan, Tianhao
  • Huang, Xiaoming
  • Marasteanu, Mihai
  • 0000-0001-8331-4504
  • Zhang, Meng
• Conference:
  • Transportation Research Board 97th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2018-1-7 to 2018-1-11
• Date: 2018

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 17p

Subject/Index Terms

• TRT Terms: Finite element method; Flexible pavements; Rolling contact; Rutting
• Identifier Terms: Arbitrary-Lagrange-Eularian
• Uncontrolled Terms: Viscoelastic analysis
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 01659643
• Record Type: Publication
• Report/Paper Numbers: 18-02850
• Files: TRIS, TRB, ATRI
• Created Date: Feb 8 2018 10:20AM