Application of fractional calculus in modelling ballast deformation under cyclic loading

Publication Type:
Journal Article
Citation:
Computers and Geotechnics, 2017, 82 pp. 16 - 30
Issue Date:
2017-02-01
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© 2016 Elsevier Ltd 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.
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