Simulation of NAPTF High Tire Pressure Tests with Advanced Finite Element Modeling

The new generation of aircrafts, like Boeing 787 and Airbus 350/380, has tire pressure exceeding 1.5MPa. This creates a challenge for the traditional Pavement Classification Number (PCN) rating with 1.5MPa limitation. A series of high tire pressure tests on heated pavements have been conducted at the National Airport Pavement Test Facility (NAPTF) to duplicate the worst-case conditions likely to be encountered in the field. This paper aims to evaluate the effect of high aircraft tire pressure on asphalt pavement responses using three-dimensional (3-D) finite element (FE) modeling. The FE model characterized the hot-mix asphalt (HMA) layer as a viscoelastic material and utilized an implicit dynamic analysis to predict the time-dependent pavement responses under moving aircraft tire loading. The tire loading was simulated as a continuously moving load having half-sinusoidal shape distribution along the contact length and non-uniform distribution along five ribs of the tire. The pavement responses (tensile, shear and compressive stresses/strains) under various loading conditions were calculated and compared. Two temperature profiles were considered in the analysis; one is the “artificial” bottom-up heating that was used in the NAPTF full-scale test and another one is the "natural" top-down heating. The results show that the critical pavement responses increase by 10 to 20% as the tire inflation pressure increases from 1.45 to 1.69MPa, depending on the type of pavement response. The analysis findings can support the NAPTF high tire pressure test results and provide valuable suggestions for airfield pavement design under heavy aircrafts with high tire pressure.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 13p
  • Monograph Title: 2014 FAA Worldwide Airport Technology Transfer Conference Proceedings: Innovations in Airport Safety and Pavement Technology

Subject/Index Terms

Filing Info

  • Accession Number: 01538270
  • Record Type: Publication
  • Report/Paper Numbers: P10061
  • Files: TRIS, ATRI, USDOT
  • Created Date: Sep 9 2014 6:28AM