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Mechanical Behaviour of Unsaturated Soil

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".

Deadline for manuscript submissions: 30 December 2025 | Viewed by 558

Special Issue Editors


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Guest Editor
Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China
Interests: multiscale particle morphology of granular soils; multiscale modelling and simulation of geomaterials; data-driven constitutive modelling of granular materials

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Guest Editor
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, China
Interests: testing methods for the multi-scale mechanical behavior of geotechnical materials; numerical simulation of granular materials; geotechnical engineering of atolls and reefs

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Guest Editor
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
Interests: micromechanics of granular media; discrete element modelling (DEM); multiscale modelling and simulation of geomaterials; computational geomechanics; machine learning in geoscience

Special Issue Information

Dear Colleagues,

This Special Issue presents current and new insights related to the exploration of the micro–macro mechanical behaviours of granular materials. Granular materials are ubiquitous in nature, from sandcastles built by little builders on the beach to the computer chip that is indispensable in our daily lives. In the domain of soil mechanics and powder technology, the study of granular materials has a pedigree going back to the previous century, where researchers sought to understand and predict how granular materials behave upon various loading conditions. With the rapid development of optical equipment, imaging techniques, and numerical simulation methodology, we have more choices to investigate granular materials and are getting closer to a better understanding of the mechanics.

Researchers are encouraged to submit their latest findings and results as full-length articles or reviews. Targeted topics include, but are not limited to, the design and application of new experimental techniques, the experimental characterization of micro-structures and micro-morphologies of geomaterials, the numerical modelling and analysis of fundamental geomaterial behaviours, constitutive modelling of granular materials, data-driven constitutive modelling of granular materials, and machine learning-aided approaches in this field.

Dr. Wei Xiong
Dr. Zhuang Cheng
Dr. Mengmeng Wu
Guest Editors

Manuscript Submission Information

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Keywords

  • granular soils
  • soil mechanics
  • mechanical behaviour
  • micro-structures and micro-morphologies
  • computational geomechanics
  • modelling and simulation of geomaterials
  • machine learning

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Published Papers (1 paper)

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Research

16 pages, 3465 KB  
Article
Effects of Microscopic Properties and Calibration on the Mechanical Behavior of Cohesive Soil-Rock Mixtures Based on Discrete Element Method
by Yong Huang, Min Deng, Fei Yao, Wei Luo and Lianheng Zhao
Appl. Sci. 2025, 15(19), 10529; https://doi.org/10.3390/app151910529 - 29 Sep 2025
Viewed by 276
Abstract
Selecting a reasonable mesoscopic contact model and corresponding contact parameters is a key problem in discrete element simulation. In order to characterize the mesoscopic contact characteristics between particles in cohesive soil–rock mixture (CSRM), a set of laboratory consolidated and undrained triaxial tests were [...] Read more.
Selecting a reasonable mesoscopic contact model and corresponding contact parameters is a key problem in discrete element simulation. In order to characterize the mesoscopic contact characteristics between particles in cohesive soil–rock mixture (CSRM), a set of laboratory consolidated and undrained triaxial tests were conducted on remolded samples of clay and CSRM collected in situ. Based on the experiments, 2D discrete element models of clay and CSRM were established, respectively. Considering the difference in the mechanical characteristics between soil particles and between soil and rock particles, different types of contact model were applied. The effects of the contact stiffness, bond strength, and friction coefficient between soil particles and between soil and rock particles on the stress–strain curves of both clay and CSRM numerical samples were sequentially studied by parameter sensitivity analysis. Results show that the contact stiffness and friction coefficient between soil particles affect the initial tangent modulus, the peak stress and the post-peak residual stress of the clay sample, while the bonding strength only affects its peak stress and residual stress. However, the mesoscopic contact parameters between soil and rock particles have little effect on the initial tangent modulus of CSRM sample but have a certain impact on the development of stress in the plastic stage, among which the influences of normal bonding strength and friction coefficient between soil and rock particles are more obvious. Finally, according to the comparison between the laboratory test results and the corresponding numerical simulation results in both clay and CSRM samples, mesoscopic contact parameters in CSRM were calibrated. Full article
(This article belongs to the Special Issue Mechanical Behaviour of Unsaturated Soil)
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