Modelling long-term deformation of granular soils incorporating the concept of fractional calculus

被引:0
|
作者
Yifei Sun [1 ]
Yang Xiao [2 ]
Changjie Zheng [3 ]
Khairul Fikry Hanif [4 ]
机构
[1] Faculty of Engineering and Information Sciences, University of Wollongong
[2] College of Civil Engineering, Chongqing University
[3] ARC Centre of Excellence for Geotechnical Science and Engineering, University of Newcastle
[4] Faculty of Engineering, Computing and Mathematics,University of Western Australia
关键词
Constitutive model; Fractional order; Fractional calculus; Long-term deformation;
D O I
暂无
中图分类号
O347.7 [散体力学];
学科分类号
080102 ;
摘要
Many constitutive models exist to characterise the cyclic behaviour of granular soils but can only simulate deformations for very limited cycles. Fractional derivatives have been regarded as one potential instrument for modelling memory-dependent phenomena. In this paper, the physical connection between the fractional derivative order and the fractal dimension of granular soils is investigated in detail.Then a modified elasto-plastic constitutive model is proposed for evaluating the long-term deformation of granular soils under cyclic loading by incorporating the concept of factional calculus. To describe the flow direction of granular soils under cyclic loading, a cyclic flow potential considering particle breakage is used. Test results of several types of granular soils are used to validate the model performance.
引用
收藏
页码:112 / 124
页数:13
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