Now showing items 1-11 of 11

    • Application of continuum laws in discontinuity analysis based on a regularised displacement discontinuity 

      Wells, G N; Sluys, L J (1999-09)
      The application of continuum constitutive laws in embedded strong discontinuity analysis is examined. By adopting a regularised discontinuity (approximating the unbounded strain field resulting from a displacement jump ...
    • A combined experimental-numerical study to cyclic behaviour of limestone 

      De Proft, K; Wells, G N; Sluys, L J; De Wilde, W P (2003)
      In this paper, a combined experimental-computational study of double-edge notched stone specimen subject to cyclic tensile loading is presented. In the experimental part, the load-deformation response and the local ...
    • Computational modelling of cracks in viscoplastic media 

      Wells, G N; Sluys, L J; De Borst, R (2001)
      A newly developed numerical model is used to simulate propagating cracks in a strain softening viscoplastic medium. The model allows the simulation of displacement discontinuities independently of a finite element mesh. ...
    • Discontinuities in regularised media 

      Simone, A; Wells, G N; Sluys, L J (2003)
      Discontinuous interpolation of the problem fields in non-local and rate-dependent media is considered. The necessity of discontinuities in the analysis of failure processes and some of the requirements for the introduction ...
    • Discontinuous Modelling of Crack Propagation in a Gradient-Enhanced Continuum 

      Simone, A; Wells, G N; Sluys, L J (2002-07)
      A numerical model for the description of the combined continuous/discontinuous failure in a regularised strain-softening continuum is proposed. The continuum is regularised through the introduction of gradient terms into ...
    • Discrete analysis of localisation in three-dimensional solids 

      Wells, G N; Sluys, L J (2000-09)
      A procedure is illustrated for the determination of the normal direction of a discontinuity plane within a solid finite element. Using so-called embedded discontinuities, discrete constitutive models can be applied within ...
    • Embedded discontinuities for softening solids 

      Wells, G N; Sluys, L J (1999)
      Additional, discontinuous functions are added to the displacement field of standard finite elements in order to capture highly localised zones of intense straining. By embedding discontinuities within an element it is ...
    • Multi-level analysis of localisation problems 

      Sluys, L J; Estrin, Y; Wells, G N (2001-06)
      Localisation processes, such as shear banding and necking, have been investigated following a macroscopic and a microscopic approach. Both approaches have been formulated within a finite deformation plasticity framework. ...
    • A novel technique for modelling interfaces in reinforced brittle materials 

      Simone, A; Wells, G N; Sluys, L J (2001)
      A novel numerical technique for the modelling of interfaces is introduced for the analysis of reinforced brittle materials. The method exploits the partition of unity property of finite element shape functions. By considering ...
    • A p-adaptive scheme for overcoming volumetric locking during isochoric plastic deformation 

      Wells, G N; Sluys, L J (2001-06)
      A p-adaptive scheme is developed in order to overcome volumetric locking in low order finite elements. A special adaptive scheme is used which is based on the partition of unity concept. This allows higher order polynomial ...
    • Simulating discontinuities in a gradient-enhanced continuum 

      Simone, A; Wells, G N; Sluys, L J (2002)
      A continuum-discrete model for failure in quasi-brittle materials is presented. The continuum is regularised through the introduction of gradient terms into the constitutive model. At the transition to discrete failure, ...