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DEM Investigation of Particle-Scale Mechanical Properties of Frozen Soil Based on the Nonlinear Microcontact Model Incorporating Rolling Resistance
Joint Authors
An, Lingshi
Ling, Xianzhang
Geng, Yongchang
Li, Qionglin
Zhang, Feng
Source
Mathematical Problems in Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-02-05
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Although frozen soil is in nature the discrete material, it is generally treated as the continuum material.
The mechanical properties of frozen soil are so complex to describe adequately by conventional continuum mechanics method.
In this study, the nonlinear microcontact model incorporating rolling resistance is proposed to investigate the particle-scale mechanical properties of frozen soil.
The failure mechanism of frozen soil is explicated based on the evolution of contact force chains and propagation of microcracks.
In addition, the effects of contact stiffness ratio and friction coefficient on stress-strain curve and energy evolution are evaluated.
The results show that the nonlinear microcontact model incorporating rolling resistance can better describe the experimental data.
At a higher axial strain, the contact force chains near shear band which can give rise to the soil arch effect rotate away from the shear band inclination but not so much as to become perpendicular to it.
The propagation of microcracks can be divided into two phases.
The stress-strain curve is strongly influenced by contact stiffness ratio.
In addition, friction coefficient does not significantly affect the initial tangential modulus.
Compared with frictional coefficient, the effect of contact stiffness ratio on stress-strain curve and energy evolution is greater.
American Psychological Association (APA)
An, Lingshi& Ling, Xianzhang& Geng, Yongchang& Li, Qionglin& Zhang, Feng. 2018. DEM Investigation of Particle-Scale Mechanical Properties of Frozen Soil Based on the Nonlinear Microcontact Model Incorporating Rolling Resistance. Mathematical Problems in Engineering،Vol. 2018, no. 2018, pp.1-13.
https://search.emarefa.net/detail/BIM-1206393
Modern Language Association (MLA)
An, Lingshi…[et al.]. DEM Investigation of Particle-Scale Mechanical Properties of Frozen Soil Based on the Nonlinear Microcontact Model Incorporating Rolling Resistance. Mathematical Problems in Engineering No. 2018 (2018), pp.1-13.
https://search.emarefa.net/detail/BIM-1206393
American Medical Association (AMA)
An, Lingshi& Ling, Xianzhang& Geng, Yongchang& Li, Qionglin& Zhang, Feng. DEM Investigation of Particle-Scale Mechanical Properties of Frozen Soil Based on the Nonlinear Microcontact Model Incorporating Rolling Resistance. Mathematical Problems in Engineering. 2018. Vol. 2018, no. 2018, pp.1-13.
https://search.emarefa.net/detail/BIM-1206393
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1206393