Simulation of permanent deformation using an elastic-viscoplastic constitutive relation

To develop a hot mix asphalt (HMA) performance analysis tool, measured field performance must be successfully correlated to predictions based on laboratory testing. Field performance measured at accelerated pavement testing (APT) facilities provides some of the required data. To predict this field performance, fundamental material properties can then be measured in the laboratory and utilized in a constitutive model that is incorporated in a finite element (FE) analysis under representative field boundary conditions. An elastic-viscoplastic continuum model based on Perzyna's viscoplastic theory and the Drucker-Prager yield function is proposed to simulate the permanent deformation of a HMA mixture at WesTrack. Compressive strength tests were performed at different strain rates and confinement pressures to obtain the elastic-viscoplastic constitutive material parameters. The test temperature was 60 degrees C based on the critical temperature for permanent deformation at 12.5 mm of the WesTrack replacement section. Repeated triaxial tests were performed at 30, 40, and 50 degrees C to obtain a temperature conversion factor (TCF) to account for temperature variation in the field. Permanent deformation of the replacement section was simulated by the three dimensional dynamic FEM program, ABAQUS. The selected HMA mixture was characterized as a strain dependent and pressure dependent material. The TCF provided a simple, convenient way to convert traffic loading at various temperatures to its equivalent at a standard temperature. The same trend of rutting profiles was obtained for both the measured and the simulated rutting profiles.


  • English

Media Info

  • Pagination: 22p
  • Monograph Title: Full scale accelerated pavement testing: a southern hemisphere and Asian perspective

Subject/Index Terms

Filing Info

  • Accession Number: 01389254
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Aug 23 2012 3:16AM