Improved calculation method of damage parameter in viscoelastic continuum damage model

B. Shane Underwood, Y. Richard Kim, Murthy N. Guddati

Research output: Contribution to journalArticle

111 Scopus citations

Abstract

Modelling the performance of asphalt concrete using continuum damage theories is an approach that has gained international attention in recent years. These types of models are advantageous because they ignore many of the complicated physical interactions at the microscale level and instead characterise a material using macroscale observations. One such model, the viscoelastic continuum damage model, is used in this study to examine the fatigue performance of asphalt concrete mixtures. A mathematically rigorous exploration is undertaken to specialise the model for easy prediction and characterisation using cyclic fatigue tests on cylindrical specimens. This process reveals that certain theoretical shortcomings are evident in other similar models and corrects them with a newly developed model. The resulting model is capable of capturing the underlying material property, i.e. the damage characteristic curve, which is responsible for the performance of controlled stress, controlled crosshead strain and constant crosshead rate monotonic tension until failure tests.

Original languageEnglish (US)
Pages (from-to)459-476
Number of pages18
JournalInternational Journal of Pavement Engineering
Volume11
Issue number6
DOIs
StatePublished - Dec 1 2010

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Keywords

  • asphalt concrete
  • continuum damage
  • fatigue
  • performance prediction
  • viscoelastic

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials

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