Fractional elastoplastic constitutive model for soils based on a novel 3D fractional plastic flow rule

Lu, D., Liang, J., Du, X., Ma, C. and Gao, Z. (2019) Fractional elastoplastic constitutive model for soils based on a novel 3D fractional plastic flow rule. Computers and Geotechnics, 105, pp. 277-290. (doi:10.1016/j.compgeo.2018.10.004)

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Abstract

A novel three-dimensional (3D) fractional plastic flow rule that is not limited by the coordinate basis of the differentiable function is proposed based on the fractional derivative and the coordinate transformation. By introducing the 3D fractional plastic flow rule into the characteristic stress space, a 3D fractional elastoplastic model for soil is established for the first time. Only five material parameters with clear physical significance are required in the proposed model. The capability of the model in capturing the strength and deformation behaviour of soils under true 3D stress conditions is verified by comparing model predictions with test results.

Item Type:Articles
Additional Information:This work was supported by the National Key Research and Development Program of China (Grant No. 2016YFC0701104), the National Natural Science Foundation of China (Grant Nos. 51522802, 51778026, 51421005 and 51538001) and the National Natural Science Foundation of Beijing (8161001).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gao, Dr Zhiwei
Authors: Lu, D., Liang, J., Du, X., Ma, C., and Gao, Z.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Computers and Geotechnics
Publisher:Elsevier
ISSN:0266-352X
ISSN (Online):1873-7633
Published Online:01 November 2018
Copyright Holders:Copyright © 2018 Elsevier Ltd.
First Published:First published in Computers and Geotechnics 105: 277-290
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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