Energy-based damage and fracture framework for viscoelastic asphalt concrete

Ibrahim Onifade*, Björn Birgisson, Romain Balieu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A framework based on the continuum damage mechanics and thermodynamics of irreversible processes using internal state variables is used to characterize the distributed damage in viscoelastic asphalt materials in the form of micro-crack initiation and accumulation. At low temperatures and high deformation rates, micro-cracking is considered as the source of nonlinearity and thus the cause of deviation from linear viscoelastic response. Using a non-associated damage evolution law, the proposed model shows the ability to describe the temperature-dependent processes of micro-crack initiation, evolution and macro-crack formation with good comparison to the material response in the Superpave indirect tensile (IDT) strength test.

Original languageEnglish
Pages (from-to)67-85
Number of pages19
JournalEngineering Fracture Mechanics
Volume145
Early online date9 Jul 2015
DOIs
Publication statusPublished - Aug 2015

Bibliographical note

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Keywords

  • asphalt concrete
  • damage
  • fracture
  • micro-crack
  • viscoelasticity

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