Micromechanical fracture modeling of asphalt concrete using a single-edge notched beam test

Hyunwook Kim, Michael P. Wagoner, William G. Buttlar

Research output: Contribution to journalArticlepeer-review


Cracks in asphalt pavements create irreversible structural and functional deficiencies that increase maintenance costs and decrease lifespan. Therefore, it is important to understand the fracture behavior of asphalt mixtures, which consist of irregularly shaped and randomly oriented aggregate particles and mastic. A two-dimensional clustered discrete element modeling (DEM) approach is implemented to simulate the complex crack behavior observed during asphalt concrete fracture tests. A cohesive softening model (CSM) is adapted as an intrinsic constitutive law governing material separation in asphalt concrete. A homogenous model is employed to investigate the mode I fracture behavior of asphalt concrete using a single-edge notched beam (SE(B)) test. Heterogeneous morphological features are added to numerical SE(B) specimens to investigate complex fracture mechanisms in the process zone. Energy decomposition analyses are performed to gain insight towards the forms of energy dissipation present in fracture testing of asphalt concrete. Finally, a heterogeneous model is used to simulate mixed-mode crack propagation.

Original languageEnglish (US)
Pages (from-to)677-689
Number of pages13
JournalMaterials and Structures/Materiaux et Constructions
Issue number5
StatePublished - Jun 2009
Externally publishedYes


  • Asphalt concrete
  • Cohesive softening model
  • Discrete element method
  • Fracture
  • Heterogeneous

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science
  • Mechanics of Materials


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