Ability of the classical fatigue criterion to be associated with macro-crack growth

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• 作者：Daniel Perraton ; Radouen Touhara ; Hervé Di Benedetto…
• 关键词：Bituminous mixtures ; Tension–compression tests ; Fatigue ; Complex modulus ; Damage ; Failure criteria
• 刊名：Materials and Structures
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：48
• 期：8
• 页码：2383-2395
• 全文大小：1,380 KB
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  13.Perraton D, Baaj H, Di Benedetto H, Paradis M (2003) évaluation de la résistance à la fatigue des enrobés bitumineux fondée sur l’évolution de l’endommagement du matériau en cours d’essai: aspects fondamentaux et application à l’enrobé à matrice de pierre. Can J Civ Eng 30:902-13View Article
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• 作者单位：Daniel Perraton (1)
  Radouen Touhara (1)
  Hervé Di Benedetto (2)
  Alan Carter (1)
  
  1. Département du génie de la construction, école de Technologie Supérieure, 1100 Notre-Dame Ouest, Montreal, QC, H3C 1K3, Canada
  2. Département Génie Civil et Batiment-DGCB, University of Lyon/Ecole Nationale des Travaux Publics de l’état, Rue Maurice Audin, 69518, Vaulx en Velin Cedex, France
  
• 刊物类别：Engineering
• 刊物主题：Structural Mechanics
  Theoretical and Applied Mechanics
  Mechanical Engineering
  Operating Procedures and Materials Treatment
  Civil Engineering
  Building Materials
  
• 出版者：Springer Netherlands
• ISSN：1871-6873

文摘

W?hler’s law constitutes the foundation for the fatigue models used in mechanical–empirical (M–E) pavement design methods worldwide (Perraton, Correspondances entre les coefficients des modèles de fatigue dans les méthodes mécanistiques-empiriques de dimensionnement de chaussées souples, 2011). Often, pavement design software will consider constant parameters in describing bituminous mixtures W?hler’s law and focus on the calibration process to correlate modeling response to the fatigue cracking network observed on roads. To better define specific bituminous mixtures fatigue behaviour to be considered for modeling in an M–E pavement design method, W?hler curves obtained using the classical fatigue criterion (N f50%) were compared to those established by considering a more appropriate failure criterion (N fII/III). Fatigue measurements on GB20 asphalt concrete mixes with 2 different types of bitumens (mix A: PG58-28 and mix B: PG64-28) were investigated. In reference with N fII/III and N f50% values, W?hler curves obtained for mix A are similar even though a clearly different tendency appears for mix B fatigue results; these results illustrate the inability of the classical fatigue criterion (N f50%) to properly define the beginning of the micro-crack process in the material associated to the transition point between phases II and III in the relationship between the stiffness and the number of cycles of a sample tested in fatigue. Moreover, fatigue test results confirm that the fatigue life links to phases II/III threshold is strongly associated with a critical micro-crack density in the sample.