Application of fractional calculus in modelling ballast deformation under cyclic loading

Title: Application of fractional calculus in modelling ballast deformation under cyclic loading
Creator: Sun, Yifei; Indraratna, Buddhima; Carter, John P.; Marchant, Timothy; Nimbalkar, Sanjay
Relation: Computers and Geotechnics Vol. 82, Issue February, p. 16-30
Publisher Link: http://dx.doi.org/10.1016/j.compgeo.2016.09.010
Publisher: Elsevier
Resource Type: journal article
Date: 2017
Description: Most constitutive models can only simulate cumulative deformation after a limited number of cycles. However, railroad ballast usually experiences a large number of train passages that cause history-dependent long-term deformation. Fractional calculus is an efficient tool for modelling this phenomenon and therefore is incorporated into a constitutive model for predicting the cumulative deformation. The proposed model is further validated by comparing the model predictions with a series of corresponding experimental results. It is observed that the proposed model can realistically simulate the cumulative deformation of ballast from the onset of loading up to a large number of load cycles.
Subject: ballast; constitutive relations; cyclic loading; fractional calculus
Identifier: http://hdl.handle.net/1959.13/1391975
Identifier: uon:33315
Identifier: ISSN:0266-352X
Language: eng
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