Improved calculation method of damage parameter in viscoelastic continuum damage model

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 character...

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Bibliographic Details
Published in:The international journal of pavement engineering 2010-12, Vol.11 (6), p.459-476
Main Authors: Underwood, B. Shane, Kim, Y. Richard, Guddati, Murthy N.
Format: Article
Language:English
Subjects:
Asphalt
asphalt concrete
Asphalt pavements
Concrete
Concretes
continuum damage
Continuums
Crack propagation
Damage
fatigue
Fatigue failure
Fatigue tests
Materials fatigue
Mathematical models
Pavements
Performance evaluation
performance prediction
Physical properties
viscoelastic
Viscoelasticity
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Summary: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.
ISSN:1029-8436
1477-268X
DOI:10.1080/10298430903398088