A micromechanics-based computational model and testing protocols to characterize damage-dependent mechanical responses of asphalt mixtures in flexible pavements

Y. R. Kim, Felipe, A. C. De Freitas, D. H. Allen

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

Abstract

This paper presents a micromechanics-based computational model and testing protocols to characterize damage-associated mechanical responses (such as evolution of microcracks, structural degradation, and fracture failure) of asphalt concrete mixtures in flexible pavements. Based on micromechanics concepts, this approach employs directly-measured material and fracture properties of mixture constituents to predict damage-dependent behaviour of global scale asphalt concrete mixtures. The presented methodology is expected to provide an increase in predictive power and a significant savings in experimental costs and time over traditional phe-nomenological approaches due to its innovative features including: (1) nonlinear inelastic material behavior, (2) rate-dependent microscale fracture-damage, (3) small-scale material characterization that reduces experimental effort and complexity, and (4) non-destructive image techniques to provide real heterogeneity of asphalt concrete mixtures. Experimental protocols to measure fundamental material properties and fracture-damage characteristics of mixture constituents are introduced, and testing results are presented. Measured mixture constituent properties are then incorporated into constitutive models and micromechanical finite element analyses to ensure that the measured fundamental properties of mixture constituents are key factors controlling overall damage-induced performance of asphaltic composites. The outcomes of this study lead to establishing the linkage between the properties of the mixture constituents, microstructure distribution such as mixture heterogeneity, damage localization, and global structural performance.

Original languageEnglish (US)
Title of host publicationPavement Cracking
Subtitle of host publicationMechanisms, Modeling, Detection, Testing and Case Histories
Pages295-304
Number of pages10
StatePublished - Dec 1 2008
Event6th RILEM International Conference on Cracking in Pavements - Chicago, IL, United States
Duration: Jun 16 2008Jun 18 2008

Publication series

NamePavement Cracking: Mechanisms, Modeling, Detection, Testing and Case Histories

Other

Other6th RILEM International Conference on Cracking in Pavements
CountryUnited States
CityChicago, IL
Period6/16/086/18/08

Fingerprint

Asphalt mixtures
Micromechanics
Pavements
Asphalt concrete
Concrete mixtures
Testing
Microcracks
Constitutive models
Materials properties
Degradation
Microstructure
Composite materials
Costs

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Architecture

Cite this

Kim, Y. R., Felipe, De Freitas, A. C., & Allen, D. H. (2008). A micromechanics-based computational model and testing protocols to characterize damage-dependent mechanical responses of asphalt mixtures in flexible pavements. In Pavement Cracking: Mechanisms, Modeling, Detection, Testing and Case Histories (pp. 295-304). (Pavement Cracking: Mechanisms, Modeling, Detection, Testing and Case Histories).

A micromechanics-based computational model and testing protocols to characterize damage-dependent mechanical responses of asphalt mixtures in flexible pavements. / Kim, Y. R.; Felipe; De Freitas, A. C.; Allen, D. H.

Pavement Cracking: Mechanisms, Modeling, Detection, Testing and Case Histories. 2008. p. 295-304 (Pavement Cracking: Mechanisms, Modeling, Detection, Testing and Case Histories).

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

Kim, YR, Felipe, De Freitas, AC & Allen, DH 2008, A micromechanics-based computational model and testing protocols to characterize damage-dependent mechanical responses of asphalt mixtures in flexible pavements. in Pavement Cracking: Mechanisms, Modeling, Detection, Testing and Case Histories. Pavement Cracking: Mechanisms, Modeling, Detection, Testing and Case Histories, pp. 295-304, 6th RILEM International Conference on Cracking in Pavements, Chicago, IL, United States, 6/16/08.
Kim YR, Felipe, De Freitas AC, Allen DH. A micromechanics-based computational model and testing protocols to characterize damage-dependent mechanical responses of asphalt mixtures in flexible pavements. In Pavement Cracking: Mechanisms, Modeling, Detection, Testing and Case Histories. 2008. p. 295-304. (Pavement Cracking: Mechanisms, Modeling, Detection, Testing and Case Histories).
Kim, Y. R. ; Felipe ; De Freitas, A. C. ; Allen, D. H. / A micromechanics-based computational model and testing protocols to characterize damage-dependent mechanical responses of asphalt mixtures in flexible pavements. Pavement Cracking: Mechanisms, Modeling, Detection, Testing and Case Histories. 2008. pp. 295-304 (Pavement Cracking: Mechanisms, Modeling, Detection, Testing and Case Histories).
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