Anisotropic viscoplastic continuum damage model for asphalt mixes

Laith Tashman, Eyad Masad, Hussein Zbib, Dallas Little, Kamil Kaloush

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations


Permanent deformation is one of the most significant distresses that causes severe damage in asphalt concrete (AC) pavements. It is caused by high traffic loads associated with high field temperatures. It is believed that permanent deformation develops at a small rate and accelerates with the initiation of microcracks in asphalt pavements. An anisotropic viscoplastic continuum damage model is developed to describe the permanent deformation of asphalt pavements. The model is based on Perzyna's formulation with Drucker-Prager yield function modified to account for the material inherent anisotropy. The material anisotropy parameter is measured through microstructural analysis of two-dimensional sections of asphalt mixes. Furthermore, a damage parameter is included in the model in order to quantify the nucleation of microcracks that develop to macrocracks at later stages. The model's parameters are all determined from strength and static creep tests.

Original languageEnglish (US)
Title of host publicationGeotechnical Special Publication
EditorsE. Tutumluer, Y.M. Najjar, E. Masad
Number of pages15
StatePublished - 2004
EventRecent Advances in Materials Characterization and Modeling of Pavement Systems - New York, NY., United States
Duration: Jun 4 2002Jun 4 2002


OtherRecent Advances in Materials Characterization and Modeling of Pavement Systems
Country/TerritoryUnited States
CityNew York, NY.

ASJC Scopus subject areas

  • Building and Construction
  • Architecture
  • Soil Science


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