Fracture modeling considered rate-dependency of asphalt concrete using discrete element method

H. Kim, M. P. Wagoner, W. G. Buttlar

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

Abstract

The discrete element method represents a convenient and powerful tool for studying effects of material microstructure on fracture mechanisms in asphalt concrete. In this paper, the ratedependency of asphalt concrete is investigated using a cohesive zone model with bulk viscoelastic properties combined with bi-linear post-peak softening. Details of the constitutive models implemented in the DEM, with particular emphasis on the verification of viscoelastic models, are presented. Homogeneous and heterogeneous model results are compared, where heterogeneous models are constructed to consider aggregate morphology for particles larger than 1.18 mm. The relative importance of time-dependence and the consideration of material heterogeneity in the simulation of monotonic, Mode I fracture tests is demonstrated.

Original languageEnglish (US)
Title of host publicationAdvanced Characterisation of Pavement and Soil Engineering Materials - Proceedings of the International Conference on Advanced Characterisation of Pavement and Soil Engineering Materials
Pages79-91
Number of pages13
StatePublished - 2007
EventInternational Conference on Advanced Characterisation of Pavement and Soil Engineering Materials - Athens, Greece
Duration: Jun 20 2007Jun 22 2007

Publication series

NameAdvanced Characterisation of Pavement and Soil Engineering Materials - Proceedings of the International Conference on Advanced Characterisation of Pavement and Soil Engineering Materials
Volume1

Other

OtherInternational Conference on Advanced Characterisation of Pavement and Soil Engineering Materials
CountryGreece
CityAthens
Period6/20/076/22/07

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

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