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

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Abstract

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.

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Authors and Affiliations

  1. Laboratory for Road Engineering/Sealing Components, Empa, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, 8600, Dübendorf, Switzerland

    Hyunwook Kim

  2. Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Newmark Laboratory, 205 North Mathews Avenue, Urbana, IL, 61801, USA

    Michael P. Wagoner & William G. Buttlar

Authors
  1. Hyunwook Kim
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  2. Michael P. Wagoner
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  3. William G. Buttlar
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Correspondence to Hyunwook Kim.

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Kim, H., Wagoner, M.P. & Buttlar, W.G. Micromechanical fracture modeling of asphalt concrete using a single-edge notched beam test. Mater Struct 42, 677–689 (2009). https://doi.org/10.1617/s11527-008-9412-8

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  • DOI: https://doi.org/10.1617/s11527-008-9412-8

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