Roque Luiz da Silva Pitangueira

TL;DR: The aiming is to enclose theGFEM formulation with a minimum impact in the code structure and meet requirements for extensibility and robustness and make it possible to combine different kinds of elements and analysis models with the GFEM enrichment strategies.

TL;DR: An object-oriented implementation of the G/XFEM to model the crack nucleation and propagation in structures made of either linear or nonlinear materials, using a discontinuous function along with the asymptotic crack-tip displacement fields.

TL;DR: The application of the OOP to the constitutive modelling of a wide range of materials of engineering interest is investigated, aiming to the creation of a computational framework for constitutive models that is fully independent on the other components of a code and easy to expand.

TL;DR: In this article, a new solution strategy for the non-linear Implicit Formulation of the Boundary Element Method is presented, based on a decomposition of the strain increment variation vector in two parts: one associated to the cumulative external loads and another associated to current unbalanced vector, obtained from the difference of the first part and the calculated internal strain field distribution, during the iterative process.

TL;DR: In this article, a two-scale generalized/extended finite element method (G/XFEM) approach is used to generate numeric enrichment functions for two-dimensional problems dealing with single/multiple local phenomenon/phenomena.