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UKACM Proceedings 2024 (2024)
Presentation / Conference Contribution
(2024). UKACM Proceedings 2024. In W. M. Coombs (Ed.), Proceedings of the 2024 UK Association for Computational Mechanics Conference. https://doi.org/10.62512/conf.ukacm2024

The proceedings present 52 scientific papers written for the 32nd conference of the UK Association for Computational Mechanics (UKACM). The papers submitted to UKACM 2024 cover the breadth of computational mechanics research within the UK and beyond... Read More about UKACM Proceedings 2024.

Simulation of strain localisation with an elastoplastic micropolar material point method (2024)
Presentation / Conference Contribution
O'Hare, T. J., Gourgiotis, P. A., Coombs, W. M., & Augarde, C. E. (2024). Simulation of strain localisation with an elastoplastic micropolar material point method. In W. M. Coombs (Ed.), UKACM Proceedings 2024 (141-144). https://doi.org/10.62512/conf.ukacm2024.009

The thickness of shear bands, which form along slip surfaces during certain modes of geotechnical failure, depends directly on the size of the soil particles. Classical continuum models, however, are invariant to length scale, so the strain localisat... Read More about Simulation of strain localisation with an elastoplastic micropolar material point method.

Consequences of Terzaghi’s effective stress decomposition in the context of finite strain poro-mechanics (2024)
Presentation / Conference Contribution
Pretti, G., Coombs, W. M., & Augarde, C. E. (2024). Consequences of Terzaghi’s effective stress decomposition in the context of finite strain poro-mechanics. In W. M. Coombs (Ed.), UKACM Proceedings 2024 (109-112). https://doi.org/10.62512/conf.ukacm2024.019

Poro-mechanics is a branch of mechanics considering the hydro-mechanical behaviour of a porous solid medium whose pores are saturated by a fluid. The presence of both these constituents significantly influences the overall macro-response of the mater... Read More about Consequences of Terzaghi’s effective stress decomposition in the context of finite strain poro-mechanics.

Dynamic three-dimensional rigid body interaction with highly deformable solids, a material point approach (2024)
Presentation / Conference Contribution
Bird, R., Pretti, G., Coombs, W., Augarde, C., Sharif, Y., Brown, M., …Johnson, K. (2024). Dynamic three-dimensional rigid body interaction with highly deformable solids, a material point approach. In W. Coombs (Ed.), Proceedings of the 2024 UK Association for Computational Mechanics Conference (153-156). https://doi.org/10.62512/conf.ukacm2024.092

The ability to model rigid body interaction with highly deformable solids is a very useful tool in geoengineering, including the modelling of drag anchors on seabeds and seabed ploughing [7, 1]. However, these simulations entail several numerical cha... Read More about Dynamic three-dimensional rigid body interaction with highly deformable solids, a material point approach.

On the development of a material point method compatible arc length solver for large deformation solid mechanics (2023)
Presentation / Conference Contribution
Gavin, N., Coombs, W., Brigham, J., & Augarde, C. (2023). On the development of a material point method compatible arc length solver for large deformation solid mechanics.

The Material Point Method is a versatile technique, however, it may be unable to provide a valid solution if there is a snap-through or snap-back response in the equilibrium path. One approach of overcoming this issue is the use of path following tec... Read More about On the development of a material point method compatible arc length solver for large deformation solid mechanics.

An open-source Julia code for geotechnical MPM (2023)
Presentation / Conference Contribution
Gavin, N., Bird, R. E., Coombs, W. M., & Augarde, C. E. (2023). An open-source Julia code for geotechnical MPM. In L. Zdravkovic, S. Kontoe, D. M. G. Taborda, & A. Tsiampousi (Eds.), . https://doi.org/10.53243/numge2023-35

There is considerable interest in the Material Point Method (MPM) in the computational geotechnics community since it can model problems involving large deformations, e.g. landslides, collapses etc. without being too far from the standard finite elem... Read More about An open-source Julia code for geotechnical MPM.

Cone Penetration Tests (CPTs) in layered soils: a Material Point approach (2023)
Presentation / Conference Contribution
Bird, R., Coombs, W., Augarde, C., Brown, M., Sharif, Y., Carter, G., …Macdonald, C. (2023). Cone Penetration Tests (CPTs) in layered soils: a Material Point approach. In L. Zdravkovic, S. Kontoe, D. . M. . G. Taborda, & A. Tsiampousi (Eds.), . https://doi.org/10.53243/numge2023-743

Cone Penetration Tests (CPTs) can be used to determine in-situ soil properties and represent a practical choice for site investigation offshore, especially for linear infrastructure, such as offshore wind export cables. Information gained from CPTs i... Read More about Cone Penetration Tests (CPTs) in layered soils: a Material Point approach.

Cone penetration tests (CPTs) in bi-phase soils: A material point approach with rigid body interaction (2023)
Presentation / Conference Contribution
Bird, R., Pretti, G., Coombs, W. M., Augarde, C. E., Sharif, Y., Brown, M., …Johnson, K. (2023, April). Cone penetration tests (CPTs) in bi-phase soils: A material point approach with rigid body interaction. Paper presented at UK Association for Computational Mechanics 2023 (UKACM 2023), University of Warwick, UK

Cone Penetration Tests (CPTs) can be used to determine in-situ material properties and represent a practical choice for site investigation offshore, especially for linear infrastructure, such as Offshore Wind export cables. Information gained from CP... Read More about Cone penetration tests (CPTs) in bi-phase soils: A material point approach with rigid body interaction.

A geometrically-exact Finite Element Method for micropolar continua with finite deformations (2023)
Presentation / Conference Contribution
O'Hare, T. J., Gourgiotis, P. A., Coombs, W. M., & Augarde, C. E. (2023, April). A geometrically-exact Finite Element Method for micropolar continua with finite deformations. Paper presented at UKACM 2023, University of Warwick, Coventry, UK

Micropolar theory is a weakly non-local higher-order continuum theory based on the inclusion of independent (micro-)rotational degrees of freedom. Subsequent introduction of couple-stresses and an internal length scale mean the micropolar continuum i... Read More about A geometrically-exact Finite Element Method for micropolar continua with finite deformations.

A review of drag anchor penetration models to inform cable burial risk assessment (2022)
Presentation / Conference Contribution
Pretti, G., Coombs, W., Augarde, C., Puigvert, M., Gutierrez, J., & Cross, L. (2022, August). A review of drag anchor penetration models to inform cable burial risk assessment. Paper presented at 4th International Symposium on Frontiers in Offshore Geotechnics (ISFOG), Austin, Texas

MRI to MPM: Developing a Patient-specific Material Point Method Model of the Human Heart (2022)
Presentation / Conference Contribution
Gavin, N., Coombs, W., Brigham, J., & Augarde, C. (2022, April). MRI to MPM: Developing a Patient-specific Material Point Method Model of the Human Heart. Paper presented at UKACM 2022, Nottingham, UK

The heart is an important organ in the human body and has been widely studied using Finite Element Analysis techniques which often require extremely fine meshes in order to obtain accurate results. Also, large deformations are typically seen in heart... Read More about MRI to MPM: Developing a Patient-specific Material Point Method Model of the Human Heart.

The Virtual Element Method for Engineers (2022)
Presentation / Conference Contribution
O'Hare, T., & Augarde, C. (2022, April). The Virtual Element Method for Engineers. Paper presented at UKACM 2022, Nottingham, England

The virtual element method (VEM) is a relatively new technique, similar to the finite element method (FEM), but having no restriction on the number of element sides. This has numerous advantages, particularly regarding greater meshing flexibility, ho... Read More about The Virtual Element Method for Engineers.

A comparison of approaches for modelling poro-mechanics in the Material Point Method (2022)
Presentation / Conference Contribution
Pretti, G., Coombs, W., & Augarde, C. (2022, April). A comparison of approaches for modelling poro-mechanics in the Material Point Method. Paper presented at UKACM 2022, Nottingham, UK

When it comes to the analysis of fully saturated porous materials, a plethora of formulations [1] are available in the literature. Among them, the so-called u − p formulation constitutes a well-established approach when low-frequency problems are con... Read More about A comparison of approaches for modelling poro-mechanics in the Material Point Method.

Overcoming Volumetric Locking in Three-Dimensional Material Point Analysis (2021)
Presentation / Conference Contribution
Coombs, W., Wang, L., & Augarde, C. (2021, May). Overcoming Volumetric Locking in Three-Dimensional Material Point Analysis. Presented at IACMAG 2021

The material point method is ideally suited to modelling large deformation problems in three dimensions, especially in cases where the finite element method struggles due to mesh distortion. However, when the method is used to analyse problems with n... Read More about Overcoming Volumetric Locking in Three-Dimensional Material Point Analysis.

Geotechnical characterisation of recycled biopolymer-stabilised earthen materials (2019)
Presentation / Conference Contribution
Muguda, S., Hughes, P., Augarde, C., Perlot, C., Bruno, A., & Gallipoli, D. (2019). Geotechnical characterisation of recycled biopolymer-stabilised earthen materials.

Earthen structures (i.e. structural units manufactured from soil) are often regarded as sustainable forms of construction due to their characteristically low carbon footprint. Unstabilised earthen materials can easily be recycled or disposed, however... Read More about Geotechnical characterisation of recycled biopolymer-stabilised earthen materials.

AMPLE: A Material Point Learning Environment (2019)
Presentation / Conference Contribution
Coombs, W., Augarde, C., Bing, Y., Charlton, T., Cortis, M., Ghaffari Motlagh, Y., & Wang, L. (2019, December). AMPLE: A Material Point Learning Environment. Paper presented at Second International Conference on the Material Point Method for Modelling Soil-Water-Structure Interaction, Cambridge, UK

Advances in the Use of Biological Stabilisers and Hyper-compaction for Sustainable Earthen Construction Materials (2019)
Presentation / Conference Contribution
Muguda, S., Lucas, G., Hughes, P., Augarde, C., Cuccurullo, A., Bruno, A. W., …Gallipoli, D. (2019). Advances in the Use of Biological Stabilisers and Hyper-compaction for Sustainable Earthen Construction Materials. In B. V. Reddy, M. Mani, & P. Walker (Eds.), Earthen dwellings and structures (191-201). https://doi.org/10.1007/978-981-13-5883-8_17

In the majority of cases, earthen construction materials for real buildings require amendment to deliver suitable material properties, which could be some additional strength or resilience to erosion. In modern earthen construction, in India, Austral... Read More about Advances in the Use of Biological Stabilisers and Hyper-compaction for Sustainable Earthen Construction Materials.

The effect of ambient humidity on the stiffness and strength of a hyper-compacted silty clay for earth building (2018)
Presentation / Conference Contribution
Cuccurullo, A., Gallipoli, D., Bruno, A., La Borderie, C., Augarde, C., & Hughes, P. (2018). The effect of ambient humidity on the stiffness and strength of a hyper-compacted silty clay for earth building.

The effect of pore suction and water content on the engineering properties of partially saturated soils has been extensively studied by geotechnical researchers. It is well known that unsaturated soils become stiffer, stronger and less permeable as s... Read More about The effect of ambient humidity on the stiffness and strength of a hyper-compacted silty clay for earth building.

Preliminary study on use of biopolymers in earthen construction (2018)
Presentation / Conference Contribution
Muguda, S., Booth, S., Hughes, P., Augarde, C., Perlot, C., Bruno, A., & Gallipoli, D. (2018). Preliminary study on use of biopolymers in earthen construction.

Biopolymers are known to achieve significant soil stabilisation when working with small quan-tities. There have been studies understanding their effects on permeability, strength, compressibility and dura-bility, however, there are few studies explor... Read More about Preliminary study on use of biopolymers in earthen construction.

On the Use of Advanced Material Point Methods for Problems Involving Large Rotational Deformation (2018)
Presentation / Conference Contribution
Wang, L., Coombs, W., & Augarde, C. (2018, July). On the Use of Advanced Material Point Methods for Problems Involving Large Rotational Deformation. Paper presented at 13th World Congress on Computational Mechanics / 2nd Pan American Congress on Computational Mechanics (WCCM 2018), New York, USA

The Material Point Method (MPM) is a quasi Eulerian-Lagrangian approach to solve solid mechanics problems involving large deformations. The standard MPM discretises the physical domain using material points which are advected through a standard finit... Read More about On the Use of Advanced Material Point Methods for Problems Involving Large Rotational Deformation.

Centrifuge modelling of screw piles for offshore wind energy foundations (2018)
Presentation / Conference Contribution
Davidson, C., Al-Baghdadi, T., Brown, M., Knappett, J., Brennan, A., Augarde, C., …Ball, J. (2018). Centrifuge modelling of screw piles for offshore wind energy foundations. In A. McNamara, S. Divall, R. Goodey, N. Taylor, S. Stallebrass, & J. Panchal (Eds.), Physical modelling in geotechnics : proceedings of the 9th International Conference on Physical Modelling in Geotechnics (ICPMG 2018), July 17-20, 2018, London, United Kingdom. Volume 1 (695-700)

Screw piles (helical piles) can provide a viable, cost-effective and low-noise installation alternative to increasing the size of existing foundation solutions (e.g. monopiles) to meet the demand for the advancement of offshore wind energy into deepe... Read More about Centrifuge modelling of screw piles for offshore wind energy foundations.

On the use of the material point method to model problems involving large rotational deformation (2018)
Presentation / Conference Contribution
Wang, L., Coombs, W. M., Augarde, C. E., Brown, M. J., Knappett, J., Brennan, A., …Blake, A. (2018). On the use of the material point method to model problems involving large rotational deformation. In A. S. Cardoso, J. L. Borges, P. A. Costa, A. T. Gomes, J. C. Marques, & C. S. Vieira (Eds.), Numerical Methods in Geotechnical Engineering IX, Volume 1 : Proceedings of the 9th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE 2018), June 25-27, 2018, Porto, Portugal (585-592)

Issues with the Material Point Method for geotechnical modelling, and how to address them (2018)
Presentation / Conference Contribution
Augarde, C., Bing, Y., Charlton, T., Coombs, W., Cortis, M., Brown, M., & Brennan, A. (2018). Issues with the Material Point Method for geotechnical modelling, and how to address them. In A. . S. Cardoso, J. . L. Borges, P. . A. Costa, A. . T. Gomes, J. . C. Marques, & C. . S. Vieira (Eds.), Numerical Methods in Geotechnical Engineering IX, Volume 1 : Proceedings of the 9th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE 2018), June 25-27, 2018, Porto, Portugal (593-601)

A modified CPT based installation torque prediction for large screw piles in sand (2018)
Presentation / Conference Contribution
Davidson, C., Al-Baghdadi, T., Brown, M., Knappett, J., Brennan, A., Augarde, C., …Ball, J. (2018). A modified CPT based installation torque prediction for large screw piles in sand. In M. A. Hicks, F. Pisanò, & J. Peuchen (Eds.), Cone Penetration Testing IV 2018 : proceedings of the 4th International Symposium on Cone Penetration Testing (CPT'18), 21-22 June, 2018, Delft, The Netherlands (255-261). https://doi.org/10.1201/9780429505980

Screw piles have been suggested as an alternative foundation solution to straight-shafted piles for jacket supported offshore wind turbines in deep water. The significant environmental loads in the marine environment will require substantially larger... Read More about A modified CPT based installation torque prediction for large screw piles in sand.

On the use of advanced material point methods for problems involving large rotational deformation (2018)
Presentation / Conference Contribution
Wang, L., Coombs, W., & Augarde, C. (2018, June). On the use of advanced material point methods for problems involving large rotational deformation. Paper presented at 6th European Conference on Computational Mechanics and 7th European Conference on Computational Fluid Dynamics, Glasgow, UK

The Material Point Method (MPM) is a quasi Eulerian-Lagrangian approach to solve solid mechanics problems involving large deformations. The standard MPM [1] discretises the physical domain using material points which are advected through a standard f... Read More about On the use of advanced material point methods for problems involving large rotational deformation.

Influence of soil grading on the hygro-mechancal properties of hyper-compacted earth for masonry construction (2018)
Presentation / Conference Contribution
Cuccurullo, A., Gallipoli, D., Bruno, A. W., Augarde, C. E., Hughes, P., & La Borderie, C. (2018). Influence of soil grading on the hygro-mechancal properties of hyper-compacted earth for masonry construction. In G. Milani, A. Taliercio, & S. Garrity (Eds.),

This paper presents a study, at material scale, of the dependency between particle size distribution and the mechanical, hygroscopic and durability properties of compacted raw (unfired) earth for manufacturing bricks. Stiffness and strength are measu... Read More about Influence of soil grading on the hygro-mechancal properties of hyper-compacted earth for masonry construction.

CPT-based design procedure for installation torque prediction for screw piles installed in sand (2017)
Presentation / Conference Contribution
Al-Baghdadi, T., Brown, M., Davidson, C., Knappett, J., Brennan, A., Wang, L., …Blake, A. (2017). CPT-based design procedure for installation torque prediction for screw piles installed in sand. In Offshore site investigation and geotechnics : integrated geotechnologies - present and future : proceedings of the 8th international conference, held 12–14 September 2017 at the Royal Geographical Society, London (346-353)

Screw piles (helical piles) have been used widely as foundations for onshore projects due to their ability to provide high compressive and tensile resistance as well as reduced noise/vibration during installation. These types of piles have been propo... Read More about CPT-based design procedure for installation torque prediction for screw piles installed in sand.

Improvement of seabed cable plough tow force prediction models (2017)
Presentation / Conference Contribution
Robinson, S., Brown, M., Brennan, A., Cortis, M., Augarde, C., & Coombs, W. (2017). Improvement of seabed cable plough tow force prediction models. In Offshore site investigation and geotechnics : integrated geotechnologies - present and future. Proceedings of the 8th international conference, held 12–14 September 2017 at the Royal Geographical Society, London (914-921)

As the use of offshore renewable energy sources such as wind and wave energy systems expands, they represent an increasing portion of the energy mix. Subsea cables connecting these resources are subject to many hazards, making cable burial using cabl... Read More about Improvement of seabed cable plough tow force prediction models.

Implicit MPM with second-order convected particle domain interpolation (2017)
Presentation / Conference Contribution
Wang, L., Coombs, W., Augarde, C., & Brown, M. (2017). Implicit MPM with second-order convected particle domain interpolation. In A. Faramarzi, & S. Dirar (Eds.), Proceedings of the 25th Conference on Computational Mechanics (UKACM 2017) : 11th – 13th April 2017, School of Engineering, University of Birmingham, Birmingham, UK (264-267)

An implicit material point method (MPM) with the second-order convected particle interpolation (CPDI2) is presented in this paper. In the MPM a body is described by a number of Lagrangian material points, at which state variables are stored and track... Read More about Implicit MPM with second-order convected particle domain interpolation.

The modelling of soil-tool interaction using the material point method (2017)
Presentation / Conference Contribution
Cortis, M., Coombs, W. M., Augarde, C. E., Robinson, S., Brennan, A., & Brown, M. (2017). The modelling of soil-tool interaction using the material point method. In A. Faramarzi, & S. Dirar (Eds.), Proceedings of the 25th Conference on Computational Mechanics (UKACM 2017) : 11th – 13th April 2017, School of Engineering, University of Birmingham, Birmingham, UK (211-214)

The material point method (MPM) is a numerical tool able to model very large deformations in solid mechanics such as geotechnical problems. To date, soil-tool interaction modelling in the MPM is somewhat difficult, especially when the tool position i... Read More about The modelling of soil-tool interaction using the material point method.

On the implementation of gradient plasticity with the material point method (2017)
Presentation / Conference Contribution
Charlton, T. J., Coombs, W. M., & Augarde, C. E. (2017). On the implementation of gradient plasticity with the material point method. In A. Faramarzi, & S. Dirar (Eds.), Proceedings of the 25th Conference on Computational Mechanics (UKACM 2017) : 11th – 13th April 2017, School of Engineering, University of Birmingham, Birmingham, UK (240-243)

The Material Point Method (MPM) is a computational method which allows solid mechanics problems to be modelled using material points which move through a fixed background grid. State variables are stored at these material points and tracked throughou... Read More about On the implementation of gradient plasticity with the material point method.

An implicit implementation of non-ordinary state-based peridynamics (2017)
Presentation / Conference Contribution
Hashim, N., Coombs, W., Hattori, G., & Augarde, C. (2017). An implicit implementation of non-ordinary state-based peridynamics. In A. Faramarzi, & S. Dirar (Eds.), Proceedings of the 25th Conference on Computational Mechanics (UKACM 2017) : 11th – 13th April 2017, School of Engineering, University of Birmingham, Birmingham, UK (134-137)

Peridynamics is a non-local continuum theory that was introduced by Silling. Its key advantage is its use of integral equation forms of the underlying physics, as compared to the partial differential equations in, say the finite element method and th... Read More about An implicit implementation of non-ordinary state-based peridynamics.

Energy dissipation in granular materials in triaxial tests (2017)
Presentation / Conference Contribution
Mukwiri, R., Ghaffari Motlagh, Y., Coombs, W., & Augarde, C. (2017). Energy dissipation in granular materials in triaxial tests. In A. Faramarzi, & S. Dirar (Eds.), Proceedings of the 25th Conference on Computational Mechanics (UKACM 2017) : 11th – 13th April 2017, School of Engineering, University of Birmingham, Birmingham, UK (191-194)

The triaxial test is used in a laboratory to investigate the behaviour of geotechnical materials (e.g. clays and sands). The difficulty in measuring some properties of granular media such as energy changes throughout the test have motivated the curre... Read More about Energy dissipation in granular materials in triaxial tests.

Modelling screwpile installation using the MPM (2017)
Presentation / Conference Contribution
Wang, L., Coombs, W., Augarde, C., Brown, M., Knappett, J., Brennan, A., …Blake, A. (2017). Modelling screwpile installation using the MPM. Procedia engineering, 175, 124-132. https://doi.org/10.1016/j.proeng.2017.01.040

Screwpiles are, as the name suggests, piled foundations which are screwed into the ground. They provide restraint to both upwards and downward loading directions and are commonly used for light structures subject to overturning or wind loading, such... Read More about Modelling screwpile installation using the MPM.

Modelling seabed ploughing using the material point method (2017)
Presentation / Conference Contribution
Cortis, M., Coombs, W., Augarde, C., Robinson, S., Brown, M., & Brennan, A. (2017). Modelling seabed ploughing using the material point method. In A. Rohe, K. Soga, H. Teunissen, & B. Z. Coelho (Eds.), . https://doi.org/10.1016/j.proeng.2017.01.002

Ploughing of the seabed is needed for the installation of cables and pipelines and is an area of construction likely to increase given plans in the UK and elsewhere for offshore marine energy (wind and tidal). Seabed ploughing is an expensive and som... Read More about Modelling seabed ploughing using the material point method.

Gradient elasto-plasticity with the generalised interpolation material point method (2017)
Presentation / Conference Contribution
Charlton, T., Coombs, W., & Augarde, C. (2017). Gradient elasto-plasticity with the generalised interpolation material point method. Procedia engineering, 175, 110-115. https://doi.org/10.1016/j.proeng.2017.01.036

The modelling of geomechanics problems can require a method that allows large deformations and non-linear material behaviour, in this respect the Generalised Material Point Method (GIMPM) is ideal. A fully implicit version of GIMPM has recently been... Read More about Gradient elasto-plasticity with the generalised interpolation material point method.

Improving seabed cable plough performance for offshore renewable energy (2016)
Presentation / Conference Contribution
Robinson, S., Brown, M., Brennan, A., Cortis, M., Augarde, C., & Coombs, W. (2016). Improving seabed cable plough performance for offshore renewable energy. In C. Guedes Soares, (Ed.), Progress in renewable energies offshore : proceedings of the 2nd International Conference on Renewable Energies Offshore (RENEW2016), Lisbon, Portugal, 24-26 October 2016 (1-7). https://doi.org/10.1201/9781315229256

Seabed ploughing plays an important part in providing protection to subsea cables that connect offshore renewables, and the process represents a significant portion of the overall installation cost. Current models for predicting the required tow forc... Read More about Improving seabed cable plough performance for offshore renewable energy.

Branched crack modelling with the Cracking Particle Method (2016)
Presentation / Conference Contribution
Ai, W., Augarde, C., & Trevelyan, J. (2016). Branched crack modelling with the Cracking Particle Method. In Proceedings of the 24th UK Conference of the Association for Computational Mechanics in Engineering, 31 March - 01 April 2016, Cardiff University, Cardiff (125-128)

Multiple crack simulation is of great importance in failure analysis since fracture in brittle materials in practice usually comprises multiple cracks. Traditional numerical methods like the extended finite element and the element free Galerkin metho... Read More about Branched crack modelling with the Cracking Particle Method.

Implicit essential boundaries in the Material Point Method (2016)
Presentation / Conference Contribution
Cortis, M., Coombs, W., & Augarde, C. (2016). Implicit essential boundaries in the Material Point Method. In Proceedings of the 24th UK Conference of the Association for Computational Mechanics in Engineering, 31 March - 01 April 2016, Cardiff University, Cardiff (116-119)

The Material Point Method (MPM) is a numerical boundary value problem (BVP) solver developed from particle- in-cell (PIC) methods that discretises the continuum into a set of material points. Information at these material points is mapped to a backgr... Read More about Implicit essential boundaries in the Material Point Method.

Gradient elasticity with the material point method (2016)
Presentation / Conference Contribution
Charlton, T., Coombs, W., & Augarde, C. (2016). Gradient elasticity with the material point method. In Proceedings of the 24th UK Conference of the Association for Computational Mechanics in Engineering, 31 March - 01 April 2016, Cardiff University, Cardiff (112-115)

The Material Point Method (MPM) is a method that allows solid mechanics problems with large deformation and non-linearity to be modelled using particles at which state variables are stored and tracked. Calculations are then carried out on a regular b... Read More about Gradient elasticity with the material point method.

Energy dissipation in granular material under 1D compression (2016)
Presentation / Conference Contribution
Mukwiri, R., Ghaffari Motlagh, Y., Coombs, W., & Augarde, C. (2016). Energy dissipation in granular material under 1D compression. In Proceedings of the 24th UK Conference of the Association for Computational Mechanics in Engineering, 31 March - 01 April 2016, Cardiff University, Cardiff (231-234)

In recent years it has been shown that the micro-mechanics of one-dimensional normal compression of sands can be modelled in three-dimensions within the discrete element method [7]. The compression is displacement driven such that the top platen of t... Read More about Energy dissipation in granular material under 1D compression.

An overview of research activities and achievement in Geotechnics from the Scottish Universities Geotechnics Network (SUGN) (2015)
Presentation / Conference Contribution
Leung, A., Anastasopoulos, I., Augarde, C., Barreto, D., Brennan, A., Brown, M., …Zielinski, M. (2015). An overview of research activities and achievement in Geotechnics from the Scottish Universities Geotechnics Network (SUGN). In M. . G. Winter, D. . M. Smith, P. . J. . L. Eldred, & D. . G. Toll (Eds.), Geotechnical engineering for infrastructure and development : XVI European conference on soil mechanics and geotechnical engineering (4289-4294)

ABSTRACT: Design of geotechnical systems is often challenging as it requires the understanding of complex soil behaviour and its influence on field-scale performance of geo-structures. To advance the scientific knowledge and the technological develop... Read More about An overview of research activities and achievement in Geotechnics from the Scottish Universities Geotechnics Network (SUGN).

Geotechnical aspects of earthen construction materials (2015)
Presentation / Conference Contribution
Augarde, C. E., Smith, J. C., Corbin, A. C., Ciancio, D., Beckett, C. T. S., & Jaquin, P. A. (2015). Geotechnical aspects of earthen construction materials. In M. G. Winter, D. M. Smith, P. J. L. Eldred, & D. G. Toll (Eds.), Geotechnical engineering for infrastructure and development : XVI European conference on soil mechanics and geotechnical engineering (535-540). https://doi.org/10.1680/ecsmge.60678

ABSTRACT: Earthen construction and soil-based construction materials (SBCMs) are expanding areas of interest worldwide. They offer the potential for low carbon and embodied energy, sustainability through recycling and an alternative to high energy ma... Read More about Geotechnical aspects of earthen construction materials.

Investigation into the shear behaviour of rammed earth using shear box tests (2015)
Presentation / Conference Contribution
Corbin, A. C., & Augarde, C. E. (2015). Investigation into the shear behaviour of rammed earth using shear box tests. In S. Amziane, & M. Sonebi (Eds.), Proceedings of the First International Conference on Bio-based Building Materials (93-98)

Scientific investigations into the structural properties of rammed earth (RE) are gaining momentum and a number of parameters (e.g. suction, particle size distribution and water content), influential on material strength and other properties, have be... Read More about Investigation into the shear behaviour of rammed earth using shear box tests.

On the implicit implementation of the Generalised Interpolation Material Point method (2015)
Presentation / Conference Contribution
Charlton, T. J., Coombs, W. M., & Augarde, C. E. (2015). On the implicit implementation of the Generalised Interpolation Material Point method. In A. J. Gil, & R. Sevilla (Eds.), Proceedings of the 23rd Conference on Computational Mechanics, ACME-UK 2015 (413-416)

The modelling of solid mechanics problems often requires a method which allows large deformations and can account for non-linear behaviour. The Material Point Method (MPM) allows this by modelling a problem domain using particles (or Material Points,... Read More about On the implicit implementation of the Generalised Interpolation Material Point method.

A review of the Material Point Method and its links to other computational methods (2014)
Presentation / Conference Contribution
Charlton, T., Coombs, W., & Augarde, C. (2014). A review of the Material Point Method and its links to other computational methods. In A. Javadi, & M. S. Hussain (Eds.), Proceedings of the 22nd UK National Conference of the Association for Computational Mechanics in Engineering, 2nd - 4th April 2014, University of Exeter, UK (17-20)

There is considerable interest in development of solid mechanics modelling which can cope with both material and geometric nonlinearity, particularly in areas such as computational geotechnics, for applications such as slope failure and foundation in... Read More about A review of the Material Point Method and its links to other computational methods.

On the f fields of inadmissible stress space (2011)
Presentation / Conference Contribution
Coombs, W. M., Crouch, R. S., & Augarde, C. E. (2011). On the f fields of inadmissible stress space. In E. Oñate, D. R. J. Owen, D. Peric, & B. Suárez (Eds.), Computational plasticity XI: fundamentals and applications

Unique Critical State Hyperplasticity (2011)
Presentation / Conference Contribution
Coombs, W. M., Crouch, R. S., & Augarde, C. E. (2011). Unique Critical State Hyperplasticity. In O. Laghrouche, A. EL Kacimi, P. Woodward, & G. Medero (Eds.), Proceedings of the 19th UK National Conference of the Association for Computational Mechanics in Engineering : 5-6 April 2011, Heriot-Watt University, Edinburgh (49-52)

Over the last 30 years there has been considerable interest in the extension of the modifed Cam Clay constitutive model to include anisotropic material behaviour. Many formulations have been proposed that allow the elliptical yield (or bounding) surf... Read More about Unique Critical State Hyperplasticity.

Advances in tensiometer-based suction control systems (2011)
Presentation / Conference Contribution
Lourenço, S. D. N., Gallipoli, D., Toll, D. G., Augarde, C. E., & Evans, F. D. (2011). Advances in tensiometer-based suction control systems. In E. Alonso, & A. Gens (Eds.), Unsaturated soils (695-700). https://doi.org/10.1201/b10526-108

Cunningham (2000) and Jotisankasa (2005) pioneered the development of tensiometer-based suction control systems. In these systems, wetting and drying of the soil are achieved by water injection and circulation of air in contact with the specimen whil... Read More about Advances in tensiometer-based suction control systems.

Parameter Identification of BBM Model Using a Parallel Asynchronous Differential Evolution Algorithm (2010)
Presentation / Conference Contribution
Zhang, Y., Feng, X., Gallipoli, D., & Augarde, C. E. (2010). Parameter Identification of BBM Model Using a Parallel Asynchronous Differential Evolution Algorithm. In E. Alonso, & A. Gens (Eds.), Unsaturated soils : proceedings of the Fifth International Conference on Unsaturated Soils, Barcelona, Spain, 6-8 September 2010 (1001-1007). https://doi.org/10.1201/b10526-154

Advances in meshless methods with application to geotechnics (2010)
Presentation / Conference Contribution
Heaney, C., Augarde, C., Deeks, A., Coombs, W., & Crouch, R. (2010). Advances in meshless methods with application to geotechnics. In T. Benz, & S. Nordal (Eds.), Numerical Methods in Geotechnical Engineering (239-244)

Finite element methods are well-established for modelling problems in geotechnics involving elasto-plastic constitutive models. However, meshless methods could offer some advantages for problems involving finite deformations as the mesh entanglement... Read More about Advances in meshless methods with application to geotechnics.

70-line 3D finite deformation elastoplastic finite-element code (2010)
Presentation / Conference Contribution
Coombs, W., Crouch, R., & Augarde, C. (2010). 70-line 3D finite deformation elastoplastic finite-element code. In B. T., & N. S. (Eds.), Numerical methods in geotechnical engineering : proceedings of the seventh european conference on numerical methods in geotechnical engineering, Trondheim, Norway, 2-4 June 2010 (151-156). https://doi.org/10.1201/b10551-28

Few freeware FE programs offer the capabilities to include 3D finite deformation inelastic continuum analysis; those that do are typically expressed in tens of thousands of lines. This paper offers for the first time compact MATLAB scripts forming a... Read More about 70-line 3D finite deformation elastoplastic finite-element code.

On the necessity for rotational yielding in anisotropic plasticity (2009)
Presentation / Conference Contribution
Coombs, W., Crouch, R., & Augarde, C. (2009). On the necessity for rotational yielding in anisotropic plasticity. In C. Sansour (Ed.), 17th UK Conference on Computational Mechanics (ACME-UK) (345-348)

Following suggestions by Masın [1], this paper re-examines whether the inelastic irrecoverable deformation of cohesive geomaterials can be adequately captured by Bounding Surface-type plasticity models with isotropic outer-surfaces (such as that prop... Read More about On the necessity for rotational yielding in anisotropic plasticity.

The effects of nodal arrangement on solution accuracy in meshless methods (2009)
Presentation / Conference Contribution
Zhuang, X. Y., & Augarde, C. E. (2009). The effects of nodal arrangement on solution accuracy in meshless methods. In C. Sansour (Ed.), Proceedings of the 17th annual conference of association of computational mechanics in engineering, Nottingham, UK, 6–8 April 2009 (125-128)

Efficient Calculation of Stress Intensity Factors using a Coupled BEM-SBFEM Algorithm. (2008)
Presentation / Conference Contribution
Bird, G. E., Trevelyan, J., & Augarde, C. E. (2008). Efficient Calculation of Stress Intensity Factors using a Coupled BEM-SBFEM Algorithm. In B. A. Schrefler, & U. Perego (Eds.), 8th World Congress on Computational Mechanics WCCM8. 5th European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS 2008

Unsaturated characteristics of rammed earth (2008)
Presentation / Conference Contribution
Jaquin, P. A., Augarde, C. E., & Legrand, L. (2008). Unsaturated characteristics of rammed earth. In D. G. Toll, C. E. Augarde, D. Gallipoli, & S. J. Wheeler (Eds.), Unsaturated soils : advances in geo-engineering : proceedings of the 1st European Conference on Unsaturated Soils, E-UNSAT 2008, Durham, United Kingdom, 2-4 July 2008 (417-422). https://doi.org/10.1201/9780203884430.ch53

Observations of unsaturated soils by Environmental Scanning Electron Microscopy in dynamic mode (2008)
Presentation / Conference Contribution
Lourenço, S. D. N., Toll, D. G., Augarde, C. E., Gallipoli, D., Congreve, A., Smart, T., & Evans, F. (2008). Observations of unsaturated soils by Environmental Scanning Electron Microscopy in dynamic mode. In Unsaturated soils : advances in geo-engineering : proceedings of the 1st European Conference on Unsaturated Soils, E-UNSAT 2008, Durham, United Kingdom, 2-4 July 2008 (145-150). https://doi.org/10.1201/9780203884430.ch15

The Effects of Geotechnical Material Properties on the convergence of iterative Solvers (2008)
Presentation / Conference Contribution
Augarde, C. E., Crouch, R. S., Li, T., & Ramage, A. (2008). The Effects of Geotechnical Material Properties on the convergence of iterative Solvers. In D. Singh (Ed.),

There is increasing interest in the use of iterative rather than direct solvers for geotechnical finite element analysis. For large 3D problems iterative solvers offer the only possibility of economical solution on a desktop PC. The major stumbling b... Read More about The Effects of Geotechnical Material Properties on the convergence of iterative Solvers.

Historic rammed earth structures in Spain: construction techniques and a preliminary classification (2007)
Presentation / Conference Contribution
Jaquin, P., Augarde, C., & Gerrard, C. (2007). Historic rammed earth structures in Spain: construction techniques and a preliminary classification. In B. V. Venkatarama Reddy, & M. Mani (Eds.), Proceedings of International Symposium on Earthen Structures 2007

Conservation and repair of historic rammed earth sites should only be undertaken if there is a good understanding of the consequences of any intervention technique. Until recently there has been little interest in the characterisation of historic ram... Read More about Historic rammed earth structures in Spain: construction techniques and a preliminary classification.

Parallel Computing of Unsaturated Soils Using Element-By-Element and Domain Decomposition Methods (2007)
Presentation / Conference Contribution
Zhang, Y., Gallipoli, D., & Augarde, C. (2007). Parallel Computing of Unsaturated Soils Using Element-By-Element and Domain Decomposition Methods. In Z. Z. Yin, J. P. Yuan, & A. C. .. Chiu (Eds.),

The finite element (FE) simulation of large scale boundary value problems in unsaturated soils is particularly time-consuming owing to the complex properties of the unsaturated porous media. To speed up analyses, a parallel FE code has been developed... Read More about Parallel Computing of Unsaturated Soils Using Element-By-Element and Domain Decomposition Methods.

Suction measurements of a sandy-clay soil with the filter paper technique (2007)
Presentation / Conference Contribution
Mendes, J., Gallipoli, D., Augarde, C., Toll, D., & Medero, G. (2007). Suction measurements of a sandy-clay soil with the filter paper technique.

This paper presents a study of the soil water retention curves of a sandy clay soil compacted at different water contents. The suction measurements were obtained using the filter paper and the psychrometer methods. For each compaction condition, the... Read More about Suction measurements of a sandy-clay soil with the filter paper technique.

A coupled meshfree/scaled boundary method (2006)
Presentation / Conference Contribution
Augarde, C. E., & Deeks, A. J. (2006). A coupled meshfree/scaled boundary method. In G. R. Liu (Ed.), Computational Methods (1429-1433). https://doi.org/10.1007/978-1-4020-3953-9_65

However, it is limited to linear problems. Many soft-ground geotechnical problems require both non-linear constitutive behaviour for the soil, to capture pre-failure deformations, and the presence of an unbounded domain. Adaptive meshfree methods are... Read More about A coupled meshfree/scaled boundary method.

Analysis of historic rammed earth construction (2006)
Presentation / Conference Contribution
Jaquin, P., Augarde, C., & Gerrard, C. (2006). Analysis of historic rammed earth construction. In P. B. Lourenco, P. Roca, C. Modena, & S. Agrawal (Eds.),

Rammed earth is a widely used historic building material, found in Mediterranean regions, along the Silk Road, and in parts of the Himalayas. While guidelines exist for the construction of new rammed earth structures, there is very little guidance fo... Read More about Analysis of historic rammed earth construction.

The MUSE Network: sharing research expertise on unsaturated soils across Europe (2006)
Presentation / Conference Contribution
Gallipoli, D., Toll, D., Augarde, C., Tarantino, A., De Gennaro, V., Vaunat, J., …Mancuso, C. (2006). The MUSE Network: sharing research expertise on unsaturated soils across Europe. In G. A. Miller, C. E. Zapata, S. L. Houston, & D. G. Fredlund (Eds.), 4th International Conference on Unsaturated Soils ; 2-5 April, 2006, Carefree, AZ, USA.; proceedings. https://doi.org/10.1061/40802%28189%29175

The paper presents the MUSE project to academics and practitioners who have an interest in the area of unsaturated soil mechanics. The MUSE ("Mechanics of Unsaturated Soils for Engineering") project is a major research and training network funded by... Read More about The MUSE Network: sharing research expertise on unsaturated soils across Europe.

On preconditioning strategies for geotechnics (2005)
Presentation / Conference Contribution
Augarde, C. E., Staudacher, J., & Ramage, A. (2005). On preconditioning strategies for geotechnics. In G. Barla, & M. Barla (Eds.),

Iterative solvers are of increasing interest in geomechanics with the move towards 3D finite element modelling. Potentially, these methods can lead to reduced computational complexity as, unlike direct methods, they do not require the full system mat... Read More about On preconditioning strategies for geotechnics.

Object Oriented Design of Parallel and Sequential Finite Element Codes (2005)
Presentation / Conference Contribution
Lazarov, B., & Augarde, C. (2005). Object Oriented Design of Parallel and Sequential Finite Element Codes.

The Finite Element (FE) Method is a widely accepted general purpose numerical modelling tool. Typical FE programs consist of several hundred thousand lines of procedural code and many complex data structures. Alternative approaches, based on object o... Read More about Object Oriented Design of Parallel and Sequential Finite Element Codes.

Analysis of Tapial structures for modern use and conservation (2004)
Presentation / Conference Contribution
Augarde, C., Jaquin, P., & Gerrard, C. (2004). Analysis of Tapial structures for modern use and conservation.

Tapial is an ancient form of rammed earth wall construction found in many parts of the world. In medieval Spain, Tapial was used in the construction of some large and complex structures, some many-storied. That these buildings remain standing (many r... Read More about Analysis of Tapial structures for modern use and conservation.

Interaction between multiple tunnels in soft ground (2004)
Presentation / Conference Contribution
Koungelis, D., & Augarde, C. (2004). Interaction between multiple tunnels in soft ground. In A. J. Deeks, & H. Hao (Eds.), Developments in mechanics of structures & materials : proceedings of the 18th Australasian Conference on the Mechanics of Structures and Materials, Perth, Australia, 1-3 December 2004 (1031-1036)

An important aspect of planning for shallow tunnelling under urban areas in soft ground is the determination of likely surface movements and interaction with existing structures. Considerable research has been undertaken of this problem for the case... Read More about Interaction between multiple tunnels in soft ground.

Analysis of Tapial structures for modern use and conservation. (2004)
Presentation / Conference Contribution
Jaquin, P. A., Augarde, C. E., & Gerrard, C. M. (2004). Analysis of Tapial structures for modern use and conservation. In C. Modena, P. B. Lourenço, & P. Roca (Eds.), Structural Analysis of Historical Constructions - 2 Volume Set: Possibilities of Numerical and Experimental Techniques - Proceedings of the IVth Int. Seminar on Structural Analysis of Historical Constructions, 10-13 November 2004, Padova, Italy (1315-1321)

Tapial is an ancient form of rammed earth wall construction found in many parts of the world. In medieval Spain, Tapial was used in the construction of some very large and complex structures, some many-storied. That these buildings remain standing (m... Read More about Analysis of Tapial structures for modern use and conservation..

Stresses around a square tunnel using a meshless scaled boundary method (2004)
Presentation / Conference Contribution
Deeks, A., & Augarde, C. (2004). Stresses around a square tunnel using a meshless scaled boundary method.

The scaled boundary finite element method (SBFEM) combines advantages of the conventional displacement finite element method (FE) and the boundary element method for problems in solid mechanics. In the SBFEM, a “scaling centre” is defined for a domai... Read More about Stresses around a square tunnel using a meshless scaled boundary method.