ORCID Profile
0000-0001-8071-5433
Current Organisation
Monash University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Civil Geotechnical Engineering | Civil Engineering | Geomechanics and Resources Geotechnical Engineering | Construction Materials | Infrastructure Engineering and Asset Management | Resources Engineering and Extractive Metallurgy | Construction Engineering | Mining engineering | Resources engineering and extractive metallurgy | Geomechanics and resources geotechnical engineering | Solid Mechanics | Mechanical Engineering | Mining Engineering | Numerical analysis |
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in Engineering | Climate Change Mitigation Strategies | Civil Construction Processes | Natural Hazards in Urban and Industrial Environments | Civil Construction Design | Road Infrastructure and Networks | Stone, Ceramics and Clay Materials | Metals (e.g. Composites, Coatings, Bonding) | Oil and Gas Extraction | Management of Greenhouse Gas Emissions from Construction Activities | Construction Materials Performance and Processes not elsewhere classified | Road Freight | Mining and Extraction of Copper Ores | Rail Infrastructure and Networks | International Sea Freight Transport (excl. Live Animal Transport)
Related Links
Publications
A coupled fluid-solid SPH approach to modelling flow through deformable porous media
Publisher: Elsevier BV
Date: 10-2017
Development of magnetorheological brake with two coils placed on each side of the brake housing
Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
Date: 26-11-2015
DOI: 10.15625/0866-7136/37/4/5918
Abstract: In this study a new configuration of magneto-rheological brake (MRB) with two coils placed on each side of the brake housing is proposed, optimally designed and evaluated. With this configuration, the MRB is expected to provide higher braking torque, more compact size than traditional MRB. After describing an introduction of the proposed configuration, braking torque of the proposed MRB is analyzed based on Bingham-plastic rheological model of magnetorheological fluid (MRF). The optimization of the proposed MRB, the MRB with one coil placed on each side of the brake housing and the conventional MRB is then performed considering maximum braking torque and mass of the brakes Based on the optimal results, advanced performance characteristics of the proposed MRB are figured out.
Determining Soil Thermal Conductivity Through Numerical Simulation of a Heating Test on a Heat Exchanger Pile
Publisher: Springer Science and Business Media LLC
Date: 07-03-2015
High-Resolution Modelling of Axisymmetric Granular Column Collapse Using Parallelized SPH
Publisher: Springer International Publishing
Date: 2021
Soil curling process and its influencing factors
Publisher: Canadian Science Publishing
Date: 06-2204
Abstract: Soil curling is a common phenomenon in nature due to the rearrangement of soil particles caused by moisture loss. The occurrence of curling in soils significantly affects soil performance in various disciplines. Despite its importance, most existing studies describe the soil curling process within the context of soil desiccation cracking, where boundary conditions facilitating soil curling are not well controlled, or often use the final stage of the desiccation process to infer the soil curling behaviour. Consequently, the underlying soil curling mechanism, the state of the curled soil, and the influencing factors (i.e., clay type, drying temperature, initial water content, and sand content) are not fully understood. In this study, soil curling tests were conducted to study the above-mentioned issues in different types of soils under well-controlled boundary and environmental conditions. It was found that natural clays consisting of higher portions of smectite underwent both upward curling (concave-up) and downward curling (convex-up), while artificial clay experienced only concave-up curling. Concave-up curling initiated when the s les were almost in the saturated condition, while convex-up curling started when the water content of s les was close to their plastic limits. The influencing factors had a profound effect on the moisture evaporation and thus on the soil curling state and its lift-off height. Finally, a conceptual model isproposed to explain the soil curling mechanism and factors influencing soil curling.
Modeling submerged granular flow across multiple regimes using the Eulerian–Eulerian approach with shear-induced volumetric behavior
Publisher: AIP Publishing
Date: 06-2022
DOI: 10.1063/5.0092726
Abstract: The behavior of submerged granular flow is strongly dependent on the solid volume fraction and the viscosity discontinuity over a wide range of flow regimes. To obtain a general description of this type of flow, this study proposes a new model to compute solid effective stresses of submerged granular materials across multiple flow regimes. Here, based on the critical state soil mechanics framework, a new equation is proposed to describe the evolution of elastic reference of materials caused by elastoplastic deformation. The evolution of elastic reference subsequently informs the development of static pressure, and together with the dynamic pressure computed using a well-established blended model, resulting in a new approach to compute the solid pressure induced by both dynamic and static effects. The proposed model is then implemented in the Eulerian–Eulerian approach using the finite volume method to simulate the collapses of submerged granular columns, covering different flow regimes from quasi-static to viscous depositions. Simulation results agreeing well with experimental and numerical data in the literature are a testament to the performance of a well-developed constitutive law. In addition, the simulation results comprehensibly demonstrate the important role of interstitial fluid flow as well as the initial solid volume fraction in the collapsing process across different flow regimes with different packing densities. Furthermore, the effects of initial volume fraction, fluid pressure, and phase interaction forces on the flow responses are also discussed.
Advanced Characteristics of Cement-Treated Materials with respect to Strength Performance and Damage Evolution
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-2017
A Thermodynamics-Based Formulation for Coupled Hydro-Mechanical Behaviour of Unsaturated Soils
Publisher: Springer International Publishing
Date: 2021
Point-based methods and their applications in geomechanics
Publisher: Springer Science and Business Media LLC
Date: 16-07-2021
Discrete element method investigation of particle size distribution effects on the flexural properties of cement-treated base
Publisher: Elsevier BV
Date: 09-2019
Smoothed particle hydrodynamics (SPH) and its applications in geomechanics: From solid fracture to granular behaviour and multiphase flows in porous media
Publisher: Elsevier BV
Date: 10-2021
Modelling the influence of fines content on the instability of silty sands considering grain scale interactions
Publisher: Elsevier BV
Date: 08-2021
Macroscopic pedestrian flow simulation using Smoothed Particle Hydrodynamics (SPH)
Publisher: Elsevier BV
Date: 02-2020
Capturing pressure- and rate-dependent behaviour of rocks using a new damage-plasticity model
Publisher: Elsevier BV
Date: 12-2017
Application of MPK framework to interpret volume change behavior of compacted unsaturated soils
Publisher: CRC Press
Date: 14-10-2015
DOI: 10.1201/B19248-125
Simulation of mixed‐mode fracture using SPH particles with an embedded fracture process zone
Publisher: Wiley
Date: 28-03-2020
DOI: 10.1002/NAG.3069
Meshfree SPH modelling of shrinkage induced cracking in clayey soils
Publisher: Springer Singapore
Date: 11-10-2020
Numerical predictions of post-flow behaviour of granular materials using an improved SPH model
Publisher: Springer Singapore
Date: 11-10-2019
A novel computational approach for large deformation and post-failure analyses of segmental retaining wall systems
Publisher: Wiley
Date: 15-02-2014
DOI: 10.1002/NAG.2253
Modelling 3D desiccation cracking in clayey soils using a size-dependent SPH computational approach
Publisher: Elsevier BV
Date: 12-2018
An improved SPH method for saturated soils and its application to investigate the mechanisms of embankment failure: Case of hydrostatic pore‐water pressure
Publisher: Wiley
Date: 03-10-2011
DOI: 10.1002/NAG.1084
Slope stability analysis and discontinuous slope failure simulation by elasto-plastic smoothed particle hydrodynamics (SPH)
Publisher: Thomas Telford Ltd.
Date: 07-2011
DOI: 10.1680/GEOT.9.P.046
Abstract: Most slope stability analyses have employed limit equilibrium methods (LEMs) or the finite-element method (FEM) as the standard approach. However, slope instability is often accompanied by discontinuous failure of the soil, which cannot be modelled by either LEMs or FEM. To overcome this limitation, this paper presents an extension of the smoothed particle hydrodynamics (SPH) method to evaluate the stability of a slope, and to simulate the post-failure behaviour of soil. For the slope stability analysis, the shear strength reduction technique with a modified failure criterion for distinguishing convergent from non-convergent solutions is applied to estimate the safety factor of a slope, and the critical slip surface is determined from a contour plot of accumulated plastic strain. To take the pore water pressure into account, a new SPH formulation for soil motion is developed. It is suggested that this equation can be applied to further developments of SPH for saturated soil. As an application of the proposed method, several smoothed particle slope stability analyses and corresponding slope failure simulations are presented, and compared with other solutions. The results show good agreements with other methods in terms of the safety factor and the critical slip surface. As compared with such traditional methods, however, an advantage of SPH is that it can simulate large deformation and post-failure of soil, and can thereby treat a wide range of applications in computational geomechanics, especially those that include large deformation and failure of geomaterials.
Smoothed Particle Hydrodynamics (SPH): an Overview and Recent Developments
Publisher: Springer Science and Business Media LLC
Date: 13-02-2010
Geosynthetic reinforced column supported embankments and the role of ground improvement installation effects
Publisher: Canadian Science Publishing
Date: 06-2018
Abstract: For geosynthetic reinforced column supported embankments (GRCSE) supporting a high embankment, lateral forces associated with lateral sliding and embankment stability often govern the acceptability of a given design under serviceability conditions. Frequently, the complex soil–structure–geosynthetic interaction, the size, and the three-dimensional nature of a GRCSE necessitate the use of numerical analysis to assess embankment performance relative to serviceability criteria. However, traditional finite element method techniques used to model serviceability behaviour are limited in their ability to model the geotechnical mechanisms associated with column installation, equilibration, and group installation effects. These installation effects are examined herein based on a GRCSE field case study located in Melbourne, Australia, that has been extensively instrumented. The role that these installation effects have on the performance of the GRCSE is highlighted and the behaviour of the columns supporting the embankment is emphasized. It is shown that cracking of the unreinforced columns supporting the embankment is likely inevitable and that the reduction of lateral resistance provided by the columns should be accounted for in design. The suitability of various numerical approaches currently used in design to model the columns supporting the GRCSE, and the embankment itself, are discussed and recommendations are made.
Flexural properties of cemented granular materials for pavement design
Publisher: Springer Netherlands
Date: 2016
A size-dependent constitutive modelling framework for localised failure analysis
Publisher: Springer Science and Business Media LLC
Date: 21-04-2016
DEM modelling of unsaturated seepage flows through porous media
Publisher: Springer Science and Business Media LLC
Date: 17-03-2021
A general SPH framework for transient seepage flows through unsaturated porous media considering anisotropic diffusion
Publisher: Elsevier BV
Date: 12-2021
Behavior of Geosynthetic-Reinforced Piled Embankments with Defective Piles
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2019
Effect of Specimen Size on Localization using Digital Image Correlation
Publisher: Springer Singapore
Date: 2021
A modified cohesive damage-plasticity model for distinct lattice spring model on rock fracturing
Publisher: Elsevier BV
Date: 07-2021
A generic approach to modelling flexible confined boundary conditions in SPH and its application
Publisher: Wiley
Date: 12-03-2019
DOI: 10.1002/NAG.2918
Experimental and Numerical Investigation of Flexural Behavior of Cemented Granular Materials
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2018
Constitutive modelling of partially saturated soils: Hydro-mechanical coupling in a generic thermodynamics-based formulation
Publisher: Elsevier BV
Date: 2021
Effect of cement on the engineering properties of pavement materials
Publisher: Trans Tech Publications, Ltd.
Date: 10-0100
DOI: 10.4028/WWW.SCIENTIFIC.NET/MSF.866.31
Abstract: It is well known that cement stabilization of granular materials is a cost-effective and environmentally friendly technique for the highway construction. However, the testing and design methods for these stabilized materials have not been sufficiently advanced scientifically, which hinders their full potential application. The proper characterization of the stabilized pavement materials is vital for the successful pavement design and construction. This paper presents the results from an experimental study on the effect of cement stabilization on pavement materials in terms of engineering properties essential for use in mechanistic design of road pavements. The test results from this study revealed that the index and shrinkage properties of the pavement materials are significantly influenced by cement content, and the tensile and compressive resistances of a cement stabilized pavement base layer increase significantly with the increasing cement content and increasing curing period. Based on the test results, it is concluded that the flexural modulus/UCS and the flexural strength/UCS ratios of the cement stabilized pavement materials depend on the material, age of curing, initial stage of the compacted material and laboratory testing practices.
A new SPH-based approach to simulation of granular flows using viscous damping and stress regularisation
Publisher: Springer Science and Business Media LLC
Date: 25-02-2016
Failure Mechanism of True 2D Granular Flows
Publisher: Informa UK Limited
Date: 2015
DOI: 10.1252/JCEJ.14WE358
Numerical and experimental studies of gravity effect on the mechanism of lunar excavations
Publisher: Elsevier BV
Date: 06-2009
Load-transfer platform behaviour in embankments supported on semi-rigid columns: implications of the ground reaction curve
Publisher: Canadian Science Publishing
Date: 08-2017
Abstract: Post-construction data from an instrumented geosynthetic reinforced column supported embankment (GRCSE) on drilled displacement columns in Melbourne, Australia, show the time-dependent development of arching over the 2 year monitoring period and a strong relationship between the development of arching stresses and subsoil settlement. A ground reaction curve is adopted to describe the development of arching stresses and good agreement is found for the period observed thus far. Predictions of arching stresses and load-transfer platform behaviour are presented for the remaining design life. Four phases of arching stress development (initial, maximum, load-recovery, and creep strain phases) are shown to describe the time-dependent, and subsoil-dependent, development of arching stresses that can be expected to occur in many field embankments. Of the four phases, the load-recovery phase is the most important with respect to load-transfer platform design, as it predicts the breakdown of arching stresses in the long term due to increasing subsoil settlement. This has important implications in assessing the appropriate design stress for the geosynthetic reinforcement layers, but also the deformation of the load-transfer platform in the long term.
Modeling Transitions between Free Surface and Pressurized Flow with Smoothed Particle Hydrodynamics
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2201
Experimental and numerical investigation of influence of air-voids on the compressive behaviour of foamed concrete
Publisher: Elsevier BV
Date: 09-2017
A cohesive viscoelastic-elastoplastic-damage model for DEM and its applications to predict the rate- and time-dependent behaviour of asphalt concretes
Publisher: Elsevier BV
Date: 10-2022
A scalable parallel computing SPH framework for predictions of geophysical granular flows
Publisher: Elsevier BV
Date: 05-2020
Effect of temperature on permeability of geopolymer: A primary well sealant for carbon capture and storage wells
Publisher: Elsevier BV
Date: 2014
A thermodynamics- and mechanism-based framework for constitutive models with evolving thickness of localisation band
Publisher: Elsevier BV
Date: 03-2020
SPH Simulation of Strain Localisation in Geomaterials Using a Visco-Plastic Constitutive Model
Publisher: American Society of Civil Engineers
Date: 06-07-2017
Confirmation of vehicle stability criteria through a combination of smoothed particle hydrodynamics and laboratory measurements
Publisher: Wiley
Date: 24-01-2023
DOI: 10.1111/JFR3.12885
Abstract: This study combines laboratory experiments and numerical modelling in a novel manner to assess vehicle stability. Assessing vehicle stability forms the basis of hazard classification criteria, which in turn helps in forming safety guidelines for stream crossings and planning of evacuation routes in times of floods. These criteria are based on theoretical and physical model studies carried out on different vehicle models. This article demonstrates the application of a numerical method to determine the vehicle stability threshold so that the need for a physical model study for each kind of vehicle may be avoided. The numerical investigation is performed using smoothed particle hydrodynamics (SPH) with the vehicle oriented perpendicular to the flow direction, as this is the most critical orientation. A physical model study is also performed and its results are used to validate the SPH model. The results confirm the current Australian Rainfall and Runoff (ARR) safety criteria for stationary vehicles. It also suggests that the ARR stability curve can shift depending on the road conditions that affect the vehicle's sliding mechanism.
The Roles and Effects of Friction in Cohesive Zone Modelling: A Thermodynamics-Based Formulation
Publisher: Springer Singapore
Date: 21-10-2017
An effective and stabilised (u
Publisher:
Elsevier BV
Date:
04-2023
Publisher: Elsevier BV
Date: 04-2023
Constitutive modelling of progressive localised failure in porous sandstones under shearing at high confining pressures
Publisher: Elsevier BV
Date: 03-2017
A discrete element modelling approach for fatigue damage growth in cemented materials
Publisher: Elsevier BV
Date: 21
Prediction of wetting-induced volume change behaviour of compacted unsaturated soils in the context of the MPK framework
Publisher: EDP Sciences
Date: 2016
A laboratory-scale study of the aqueous mineral carbonation of coal fly ash for CO2 sequestration
Publisher: Elsevier BV
Date: 09-0009
A new SPH-based continuum framework with an embedded fracture process zone for modelling rock fracture
Publisher: Elsevier BV
Date: 03-2019
Hybrid Discrete-Continuum Approach to Model Hydromechanical Behavior of Soil during Desiccation
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2021
Numerical modelling of laboratory soil desiccation cracking using UDEC with a mix-mode cohesive fracture model
Publisher: Elsevier BV
Date: 03-2016
Evaluation of flexural behaviour of cemented pavement material beams using distributed fibre optic sensors
Publisher: Elsevier BV
Date: 12-2017
Numerical investigation of the mechanism of granular flow impact on rigid control structures
Publisher: Springer Science and Business Media LLC
Date: 24-02-2021
An application of a cohesive crack model combining compression, tension and shear in soft rocks
Publisher: Elsevier BV
Date: 05-2015
On controlling influence of the line of optimums on the compacted clayey soil behavior
Publisher: CRC Press
Date: 05-06-2014
DOI: 10.1201/B17034-29
Biochar Sequestration in Lime-Slag Treated Synthetic Soils: A Green Approach to Ground Improvement
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2014
Localisation and Lode-Angle Dependence of Geomaterial Behaviour
Publisher: Springer Singapore
Date: 04-09-2020
A thermodynamics-based cohesive model for discrete element modelling of fracture in cemented materials
Publisher: Elsevier BV
Date: 06-2017
Numerical modelling of swelling/shrinkage behaviour of unsaturated soils for buried pipe stress analysis
Publisher: CRC Press
Date: 14-10-2015
DOI: 10.1201/B19248-102
Constitutive modelling of compaction localisation in porous sandstones
Publisher: Elsevier BV
Date: 03-2016
A cohesive damage-plasticity model for DEM and its application for numerical investigation of soft rock fracture properties
Publisher: Elsevier BV
Date: 11-2017
Dynamic Modulus Measurements of Bound Cement-Treated Base Materials
Publisher: ASTM International
Date: 04-02-2015
DOI: 10.1520/GTJ20140233
Experimental and numerical investigations of non-standardised semi-circular bending test for asphalt concrete mixtures
Publisher: Informa UK Limited
Date: 09-05-2021
Serviceability design for geosynthetic reinforced column supported embankments
Publisher: Elsevier BV
Date: 08-2017
Effect of particle rolling resistance on drained and undrained behaviour of silty sand
Publisher: Springer Science and Business Media LLC
Date: 04-01-2027
1-D Compression Behaviour of Acid Sulphate Soils Treated with Alkali-Activated Slag
Publisher: MDPI AG
Date: 15-04-2016
DOI: 10.3390/MA9040289
Experimental and Numerical Investigation of the Load-Bearing Mechanisms of Piles Socketed in Soft Rocks
Publisher: Springer Science and Business Media LLC
Date: 22-06-2022
DOI: 10.1007/S00603-022-02954-0
Abstract: Rock-socket pile design predominantly depends on the shaft resistance to support the load at the serviceability state. However, due to limited understanding of the pile–rock interactions, the pile capacity is normally calculated using empirical correlations. In this study, the load-bearing mechanisms of rock-socketed piles were investigated through a miniaturised pile–load test setup in a soft synthetic rock. X-ray CT imaging and numerical discrete element modelling were used to investigate the micro-mechanics influencing the load-bearing mechanisms at the pile–rock interface. The numerical pile model was established based on suitable constitutive models capable of simulating the soft rock behaviour. The analysis of X-ray CT images at various displacements revealed three different interface mechanisms, namely sliding, local shearing and progressive shearing. The numerical model validated this observed micro-mechanics in the rock asperities through the evolution of damage and micro-cracks. Insights from the experimental and numerical results indicated that the height of the rock asperities significantly dictates the failure mode. Results also illustrated that the shaft load–displacement response primarily depends on the forces acting on the leading edges of the pile asperity. In particular, it was observed that the bottom leading edge carried a predominant portion of the shaft loads due to its connectivity with the rock at the base of the pile. Though negligible, the forces on the trailing edges provided valuable information on the contribution of residual shaft resistance by the debris at the interface. Moreover, the numerical studies revealed the different failure modes at the pile–rock interface. The discussions presented in this study provide novel insights into the load-bearing mechanisms of piles socketed in soft rocks, which will help to improve design guidelines in the future.
A DEM approach to study desiccation processes in slurry soils
Publisher: Elsevier BV
Date: 04-2020
A Continuum Based Approach to Modelling Tensile Cracks in Soils
Publisher: American Society of Civil Engineers
Date: 06-07-2017
Predicting onset and orientation of localisation bands using a cohesive-frictional model
Publisher: Springer Singapore
Date: 11-10-2020
Effects of specimen size and loading conditions on the fracture behaviour of asphalt concretes in the SCB test
Publisher: Elsevier BV
Date: 02-2021
Analysis of transition from diffuse to localized failure in sandstone and concrete using Digital Image correlation
Publisher: Elsevier BV
Date: 05-2022
A five-phase approach, SPH framework and applications for predictions of seepage-induced internal erosion and failure in unsaturated/saturated porous media
Publisher: Elsevier BV
Date: 11-2022
Incorporation of micro-cracking and fibre bridging mechanisms in constitutive modelling of fibre reinforced concrete
Publisher: Elsevier BV
Date: 12-2019
SPH ANALYSIS ON TSUNAMI FLOW AROUND BRIDGE GIRDER
Publisher: Japan Society of Civil Engineers
Date: 2009
Numerical Simulation of Granular Materials Based on Smoothed Particle Hydrodynamics (SPH)
Publisher: AIP
Date: 2009
DOI: 10.1063/1.3179991
Effects of material properties on the mobility of granular flow
Publisher: Springer Science and Business Media LLC
Date: 23-05-2020
Kinematics of soil arching in piled embankments
Publisher: Thomas Telford Ltd.
Date: 11-2019
Abstract: The transfer of embankment stresses towards pile heads in piled embankments is attributed to the mechanism known as soil arching. Three-dimensional physical models of piled embankments were built to simulate this mechanism. The progressive settlement of subsoil beneath an embankment was modelled and paused at increments of displacements to allow synchrotron X-ray computed tomography to be performed on the models. Image correlation techniques were then applied to the reconstructed volumes to obtain evolving three-dimensional displacement and strain fields. The strain fields show localised (shear bands) and diffuse failure modes occurring above pile heads within the embankment fill. These failure surfaces are seen to progressively develop as the subsoil undergoes settlement. The displacement fields also show the formation of a plane of equal settlement developing at a height above the pile heads, known as the critical height. The critical height is dependent on the height at which the failure surfaces propagate into the embankment fill, and a method is proposed to calculate the maximum height of failure surfaces based on the observed kinematics. The full-field kinematics provide fundamental insight into the soil arching mechanism that develops within piled embankments.
Early-age fatigue damage assessment of cement-treated bases under repetitive heavy traffic loading
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2018
Modelling jointed rock mass as a continuum with an embedded cohesive-frictional model
Publisher: Elsevier BV
Date: 10-2017
A combined numerical-experimental approach to analyzing fracture initiation and development in brittle rocks
Publisher: Elsevier BV
Date: 05-2022
Lagrangian meshfree particles method (SPH) for large deformation and failure flows of geomaterial using elastic-plastic soil constitutive model
Publisher: Wiley
Date: 25-08-2008
DOI: 10.1002/NAG.688
A computationally efficient SPH framework for unsaturated soils and its application to predicting the entire rainfall-induced slope failure process
Publisher: Thomas Telford Ltd.
Date: 09-08-2022
Abstract: The first and fully validated smoothed particle hydrodynamics (SPH) model is presented to tackle coupled flow–deformation problems in unsaturated porous media that undergo large deformation and post-failure behaviour. Unlike the commonly adopted double-layer SPH framework for saturated soils, this paper presents a three-phase single-layer SPH model capable of predicting anisotropic seepage flows through porous media and their complete time-dependent transition from unsaturated to saturated states, as well as their influence on the mechanical behaviour of the porous media and vice versa. The mathematical framework is developed based on Biot's mixture theory and discretised using the authors’ recently developed novel SPH approximation scheme for the second derivatives of a field quantity. The soil is modelled using a suction-dependent elastoplastic constitutive model, expressed in terms of effective stress and suction. In addition, an adaptive two-timescale scheme is proposed for the first time to address existing challenges in solving coupled-flow large-deformation problems that involve a significant difference in the timescale required for the solid and fluid phases. The capability of the proposed SPH model was demonstrated through fundamental consolidation tests and a large-scale rainfall-induced slope failure experiment. Very good agreements with theoretical solutions and experimental results are achieved, suggesting that the proposed SPH model can be readily extended to solve a wide range of large-scale geotechnical applications involving coupled unsaturated seepage–deformation problems.
Numerical simulation of soil–water interaction using smoothed particle hydrodynamics (SPH) method
Publisher: Elsevier BV
Date: 11-2007
Localised failure mechanism as the basis for constitutive modelling of geomaterials
Publisher: Elsevier BV
Date: 12-2018
A micromechanical investigation for the effects of pore size and its distribution on geopolymer foam concrete under uniaxial compression
Publisher: Elsevier BV
Date: 03-2019
An approach to calculating large strain accumulation for discrete element simulations of granular media
Publisher: Wiley
Date: 16-04-2020
DOI: 10.1002/NAG.3076
Localised failure of geomaterials: how to extract localisation band behaviour from macro test data
Publisher: Thomas Telford Ltd.
Date: 07-2022
Abstract: The formulation and calibration of constitutive models for geomaterials require material behaviour from experiments under a wide range of triaxial loading conditions. However, failure of geomaterials usually involves localisation of deformation that leads to very strong inhomogeneous behaviour. Therefore, the experimentally measured macro (specimen) behaviour is a mix between very different responses inside and outside the localisation zone and thus should not be used as a true representation of the material responses. This paper proposes a theoretical framework that provides links between mechanical responses inside and outside the localisation band, alongside their contributions toward the overall behaviour of a specimen undergoing localised deformation. This meso–macro connection allows the quantification of behaviour inside the localisation band, which is the main source of material inelasticity, from experimentally measured specimen behaviour. Correlation between the thickness of the localisation band and its behaviour is shown, bounded by a unique stress–deformation relationship describing the behaviour of an idealised zero-thickness localisation band.
A Mesh-Free Continuum Based Computational Approach to Modelling Rock Fracture
Publisher: American Society of Civil Engineers
Date: 06-07-2017
Discrete Element Modelling of the Mechanical Behaviour of a Highly Porous Foamed Concrete
Publisher: American Society of Civil Engineers
Date: 06-07-2017
Numerical Study of Particle Size Distribution Effect on the Failure of Asphalt Mixtures Using Discrete Element Method
Publisher: American Society of Civil Engineers
Date: 06-07-2017
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Amount: $4,918,357.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE170100079
Start Date: 2017
End Date: 12-2017
Amount: $267,000.00
Funder: Australian Research Council
View Funded Activity