Dr Giuliano Pretti's Outputs (6)

A stable poro-mechanical formulation for Material Point Methods leveraging overlapping meshes and multi-field ghost penalisation (2024)
Journal Article
Pretti, G., Bird, R., Gavin, N., Coombs, W., & Augarde, C. (in press). A stable poro-mechanical formulation for Material Point Methods leveraging overlapping meshes and multi-field ghost penalisation. International Journal for Numerical Methods in Engineering,

The Material Point Method (MPM) is widely used to analyse coupled (solid-water) problems under large deformations/displacements. However, if not addressed carefully, MPM u-p formulations for poro-mechanics can be affected by two major sources of inst... Read More about A stable poro-mechanical formulation for Material Point Methods leveraging overlapping meshes and multi-field ghost penalisation.

An implicit material point-to-rigid body contact approach for large deformation soil-structure interaction (2024)
Journal Article
Bird, R., Pretti, G., Coombs, W., Augarde, C., Sharif, Y., Brown, M., Carter, G., Macdonald, C., & Johnson, K. (2024). An implicit material point-to-rigid body contact approach for large deformation soil-structure interaction. Computers and Geotechnics, 174, Article 106646. https://doi.org/10.1016/j.compgeo.2024.106646

Modelling the interaction between rigid and deformable bodies holds significant relevance in geotechnical engineering, particularly in scenarios involving stiff engineering objects interacting with highly deformable material such as soil. These proce... Read More about An implicit material point-to-rigid body contact approach for large deformation soil-structure interaction.

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, April). Consequences of Terzaghi’s effective stress decomposition in the context of finite strain poro-mechanics. Presented at 2024 UK Association for Computational Mechanics Conference, Durham, UK

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., Carter, G., Macdonald, C., & Johnson, K. (2024, April). Dynamic three-dimensional rigid body interaction with highly deformable solids, a material point approach. Presented at UK Association for Computational Mechanics Conference 2024, Durham, UK

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.

Preserving non-negative porosity values in a bi-phase elasto-plastic material under Terzaghi’s effective stress principle (2024)
Journal Article
Pretti, G., Coombs, W., Augarde, C., Marchena Puigvert, M., & Reyna Gutierrez, J. A. (2024). Preserving non-negative porosity values in a bi-phase elasto-plastic material under Terzaghi’s effective stress principle. Mechanics of Materials, 192, Article 104958. https://doi.org/10.1016/j.mechmat.2024.104958

Poromechanics is a well-established field of continuum mechanics which seeks to model materials with multiple phases, usually a stiff solid phase and fluid phases of liquids or gases. Applications are widespread particularly in geomechanics where Ter... Read More about Preserving non-negative porosity values in a bi-phase elasto-plastic material under Terzaghi’s effective stress principle.

On the implementation of a material point‐based arc‐length method (2024)
Journal Article
Gavin, N., Pretti, G., Coombs, W., Brigham, J., & Augarde, C. (2024). On the implementation of a material point‐based arc‐length method. International Journal for Numerical Methods in Engineering, 125(9), Article e7438. https://doi.org/10.1002/nme.7438

Summary: The material point method is a versatile technique which can be used to solve various types of solid mechanics problems, especially those involving large deformations. However, the capability of the material point method to track a load‐disp... Read More about On the implementation of a material point‐based arc‐length method.