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All Outputs (10)

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

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 Netherlands

The 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, Edinburgh

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 meshless methods with application to geotechnics (2010)
Presentation / Conference Contribution
Heaney, C., Augarde, C., Deeks, A., Coombs, W., & Crouch, R. (2010, June). Advances in meshless methods with application to geotechnics. Presented at 7th European Conference on Numerical Methods in Geotechnical Engineering, Trondheim, Norway

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, June). 70-line 3D finite deformation elastoplastic finite-element code. Presented at 7th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE), Trondheim, Norway

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, December). On the necessity for rotational yielding in anisotropic plasticity. Presented at 17th UK Conference on Computational Mechanics (ACME), Nottingham, England

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.