Modified schapery's model for asphalt sand / Ye, Yong in Journal of engineering mechanics, Vol. 136 N° 4 (Avril 2010)  

Public ISBD [article]  inJournal of engineering mechanics > Vol. 136 N° 4 (Avril 2010) . - pp. 448-454 Titre : Modified schapery's model for asphalt sand Type de document : texte imprimé Auteurs : Ye, Yong, Auteur ; Xinhua Yang, Auteur ; Chen, Chuanyao, Auteur Article en page(s) : pp. 448-454 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Asphalts Sand material Viscoelasticity Elastoplasticity Nonlinearity Nonlinear response Models. Résumé : Asphalt sand is described as a viscoelastoplastic materials. To involve elastic, viscoelastic, and viscoplastic strain components, a modified Schapery's model is proposed through adding a viscoplastic term to the Schapery's model with elastic and viscoelastic terms, and a strain-hardening model is used to describe viscoplastic behavior. A set of uniaxial compression tests, repeated and simple creep-recovery tests in different stress levels are performed to determine the stress-dependent parameters in the model. Finally, the model is validated by comparison with the results from the uniaxial creep experiments. Better agreement than the Schapery's model indicates that the modified model is practicable to describe the mechanical behavior of asphalt sand in uniaxial compression. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&smode=strres [...] [article] Modified schapery's model for asphalt sand [texte imprimé] / Ye, Yong, Auteur ; Xinhua Yang, Auteur ; Chen, Chuanyao, Auteur . - pp. 448-454. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 136 N° 4 (Avril 2010) . - pp. 448-454 Mots-clés : Asphalts Sand material Viscoelasticity Elastoplasticity Nonlinearity Nonlinear response Models. Résumé : Asphalt sand is described as a viscoelastoplastic materials. To involve elastic, viscoelastic, and viscoplastic strain components, a modified Schapery's model is proposed through adding a viscoplastic term to the Schapery's model with elastic and viscoelastic terms, and a strain-hardening model is used to describe viscoplastic behavior. A set of uniaxial compression tests, repeated and simple creep-recovery tests in different stress levels are performed to determine the stress-dependent parameters in the model. Finally, the model is validated by comparison with the results from the uniaxial creep experiments. Better agreement than the Schapery's model indicates that the modified model is practicable to describe the mechanical behavior of asphalt sand in uniaxial compression. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&smode=strres [...]

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire

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]  inJournal 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 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 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

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire