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Prediction method of long-term mechanical behavior of largely deformed sand asphalt with constant loading creep tests / Fan Bai in Journal of engineering mechanics, Vol. 138 N° 12 (Décembre 2012) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 138 N° 12 (Décembre 2012) . - pp.1457–1467. Titre : Prediction method of long-term mechanical behavior of largely deformed sand asphalt with constant loading creep tests Type de document : texte imprimé Auteurs : Fan Bai, Auteur ; Xinhua Yang, Auteur ; Anyi Yin, Auteur Année de publication : 2013 Article en page(s) : pp.1457–1467. Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Sand  asphalt  Time-temperature  superposition  principle  Long-term  creep  behavior  True  creep  compliance  Volterra  integral  equation Résumé : Because of large pronounced deformation in the compressive creep process of soft sand asphalt, it is necessary that both the true stress and true strain are measured. Accordingly, instead of fictitious creep compliance (FCC), true creep compliance (TCC) relating the true strain to the true stress is used to characterize the viscoelastic properties of sand asphalt in this paper. The relationship between TCC and FCC is described by a second-kind Volterra integral equation (VIE). A prediction method of long-term mechanical behavior of largely deformed sand asphalt with constant loading creep tests is proposed. In this method, the FCC master curves are constructed based on the time-temperature superposition principle, and then the linear VIE from the FCC to the TCC is solved with the collocation method, and the nonlinear VIE from the TCC to the FCC is solved with an iterative formula. Unconstrained compressive creep tests for 3,600 s were conducted on sand asphalt mixture samples in various temperature and nominal stress conditions. As an application example, the long-term creep behavior of sand asphalt at the given reference temperature is predicted with the proposed method. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000452 [article] Prediction method of long-term mechanical behavior of largely deformed sand asphalt with constant loading creep tests [texte imprimé] / Fan Bai, Auteur ; Xinhua Yang, Auteur ; Anyi Yin, Auteur . - 2013 . - pp.1457–1467. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 138 N° 12 (Décembre 2012) . - pp.1457–1467. Mots-clés : Sand  asphalt  Time-temperature  superposition  principle  Long-term  creep  behavior  True  creep  compliance  Volterra  integral  equation Résumé : Because of large pronounced deformation in the compressive creep process of soft sand asphalt, it is necessary that both the true stress and true strain are measured. Accordingly, instead of fictitious creep compliance (FCC), true creep compliance (TCC) relating the true strain to the true stress is used to characterize the viscoelastic properties of sand asphalt in this paper. The relationship between TCC and FCC is described by a second-kind Volterra integral equation (VIE). A prediction method of long-term mechanical behavior of largely deformed sand asphalt with constant loading creep tests is proposed. In this method, the FCC master curves are constructed based on the time-temperature superposition principle, and then the linear VIE from the FCC to the TCC is solved with the collocation method, and the nonlinear VIE from the TCC to the FCC is solved with an iterative formula. Unconstrained compressive creep tests for 3,600 s were conducted on sand asphalt mixture samples in various temperature and nominal stress conditions. As an application example, the long-term creep behavior of sand asphalt at the given reference temperature is predicted with the proposed method. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000452