Mortar contact formulation for hierarchical basis functions using smooth active set strategy
(2019)
Presentation / Conference Contribution
Athanasiadis, I., Kaczmarczyk, L., Ullah, Z., & Pearce, C. J. (2019, April). Mortar contact formulation for hierarchical basis functions using smooth active set strategy. Presented at Proceedings of the UK Association for Computational Mechanics Conference 2019, City University of London, London, UK
Outputs (16)
Three-dimensional FE-EFGM adaptive coupling and its applications in the nonlinear adaptive analysis (2013)
Presentation / Conference Contribution
Ullah, Z., Augarde, C., & Coombs, W. (2013, December). Three-dimensional FE-EFGM adaptive coupling and its applications in the nonlinear adaptive analysis. Presented at CM13, Durham, UK
Observations on Mohr-Coulomb plasticity under plane strain (2013)
Journal Article
Coombs, W., Crouch, R., & Heaney, C. (2013). Observations on Mohr-Coulomb plasticity under plane strain. Journal of Engineering Mechanics, 139(9), 1218-1228. https://doi.org/10.1061/%28asce%29em.1943-7889.0000568Linear elastic-perfect plasticity using the Mohr-Coulomb yield surface is one of the most widely used pressure-sensitive constitutive models in engineering practice. In the area of geotechnical engineering a number of problems, such as cavity expansi... Read More about Observations on Mohr-Coulomb plasticity under plane strain.
A unique Critical State two-surface hyperplasticity model for fine-grained particulate media (2013)
Journal Article
Coombs, W., Crouch, R., & Augarde, C. (2013). A unique Critical State two-surface hyperplasticity model for fine-grained particulate media. Journal of the Mechanics and Physics of Solids, 61(1), 175-189. https://doi.org/10.1016/j.jmps.2012.08.002Even mild compression can cause re-arrangement of the internal structure of clay-like geomaterials, whereby clusters of particles rotate and collapse as face-to-face contacts between the constituent mineral platelets increase at the expense of edge-t... Read More about A unique Critical State two-surface hyperplasticity model for fine-grained particulate media.
Plane-strain Mohr-Coulomb inelasticity (2012)
Presentation / Conference Contribution
Coombs, W., Crouch, R., & Heaney, C. (2012, March). Plane-strain Mohr-Coulomb inelasticity. Presented at 20th UK National Conference of the Association for Computational Mechanics in Engineering (ACME), Manchester, UK
FE-EFGM Coupling using maximum entropy shape functions and its application to small and finite deformation (2011)
Presentation / Conference Contribution
Ullah, Z., Augarde, C. E., Crouch, R. S., & Coombs, W. M. (2011, April). FE-EFGM Coupling using maximum entropy shape functions and its application to small and finite deformation. Presented at 19th UK Conference of the Association for Computational Mechanics in Engineering (ACME), Heriot-Watt University, Edinburgh, UK
Reuleaux plasticity: improving Mohr-Coulomb and Drucker-Prager (2011)
Presentation / Conference Contribution
Coombs, W., & Crouch, R. (2011, September). Reuleaux plasticity: improving Mohr-Coulomb and Drucker-Prager. Presented at Geotechnical Engineering: New Horizons. Proceedings of the 21st European Young Geotechnical Engineers' Conference, Rotterdam, the NetherlandsThe yielding of soil exhibits both a Lode angle dependency and a dependency on the intermediate principal stress. Ignoring these leads to a loss of realism in geotechnical analysis, yet neither of the widely used Mohr-Coulomb (M-C) or Drucker-Prager... Read More about Reuleaux plasticity: improving Mohr-Coulomb and Drucker-Prager.
On the f fields of inadmissible stress space (2011)
Presentation / Conference Contribution
Coombs, W. M., Crouch, R. S., & Augarde, C. E. (2011, July). On the f fields of inadmissible stress space. Presented at Computational Plasticity XI: Fundamentals and Applications (COMPLAS XI)., Barcelona, Spain
Unique Critical State Hyperplasticity (2011)
Presentation / Conference Contribution
Coombs, W. M., Crouch, R. S., & Augarde, C. E. (2011, April). Unique Critical State Hyperplasticity. Presented at Proceedings of the 19th UK National Conference of the Association for Computational Mechanics in Engineering, Heriot-Watt University, EdinburghOver 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.
Non-associated Reuleaux plasticity: analytical stress integration and consistent tangent for finite deformation mechanics (2011)
Journal Article
Coombs, W., & Crouch, R. (2011). Non-associated Reuleaux plasticity: analytical stress integration and consistent tangent for finite deformation mechanics. Computer Methods in Applied Mechanics and Engineering, 200(9-12), 1021-1037. https://doi.org/10.1016/j.cma.2010.11.012Analytical backward Euler stress integration is presented for a volumetrically non-associated pressure-sensitive yield criterion based on a modified Reuleaux triangle. This advances previous work on associated Reuleaux plasticity using energy-mapped... Read More about Non-associated Reuleaux plasticity: analytical stress integration and consistent tangent for finite deformation mechanics.