An extended finite element library. This paper presents and exercises a general structure for an object-oriented-enriched finite element code. The programming environment provides a robust tool for extended finite element (XFEM) computations and a modular and extensible system. The programme structure has been designed to meet all natural requirements for modularity, extensibility, and robustness. To facilitate mesh -- geometry interactions with hundreds of enrichment items, a mesh generator and mesh database are included. The salient features of the programme are: flexibility in the integration schemes (subtriangles, subquadrilaterals, independent near-tip, and discontinuous quadrature rules); domain integral methods for homogeneous and bi-material interface cracks arbitrarily oriented with respect to the mesh; geometry is described and updated by level sets, vector level sets or a standard method; standard and enriched approximations are independent; enrichment detection schemes: topological, geometrical, narrow-band, etc.; multi-material problem with an arbitrary number of interfaces and slip-interfaces; nonlinear material models such as J2 plasticity with linear, isotropic and kinematic hardening. To illustrate the possible applications of our paradigm, we present 2D linear elastic fracture mechanics for hundreds of cracks with local near-tip refinement, and crack propagation in two dimensions as well as complex 3D industrial problems.

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  1. Chau-Dinh, Thanh; Nguyen-Duy, Quang; Nguyen-Xuan, Hung: Improvement on MITC3 plate finite element using edge-based strain smoothing enhancement for plate analysis (2017)
  2. Davari, M.; Rossi, R.; Dadvand, P.: Three embedded techniques for finite element heat flow problem with embedded discontinuities (2017)
  3. Hattori, Gabriel; Trevelyan, Jon; Augarde, Charles E.; Coombs, William M.; Aplin, Andrew C.: Numerical simulation of fracking in shale rocks: current state and future approaches (2017)
  4. Wan, Detao; Hu, Dean; Natarajan, Sundararajan; Bordas, Stéphane P.A.; Yang, Gang: A fully smoothed XFEM for analysis of axisymmetric problems with weak discontinuities (2017)
  5. Beirão da Veiga, Lourenço; Brezzi, Franco; Marini, Luisa Donatella; Russo, Alessandro: Mixed virtual element methods for general second order elliptic problems on polygonal meshes (2016)
  6. Bodart, Olivier; Cayol, Valérie; Court, Sébastien; Koko, Jonas: XFEM-based fictitious domain method for linear elasticity model with crack (2016)
  7. Cen, Song; Bao, Yi; Li, Chen-Feng: Quasi-static crack propagation modeling using shape-free hybrid stress-function elements with drilling degrees of freedom (2016)
  8. Elgeti, S.; Sauerland, H.: Deforming fluid domains within the finite element method: five mesh-based tracking methods in comparison (2016)
  9. Fries, Thomas-Peter; Omerović, Samir: Higher-order accurate integration of implicit geometries (2016)
  10. Ghoneim, Adam: A new technique for numerical simulation of dendritic solidification using a meshfree interface finite element method (2016)
  11. Gupta, Varun; Duarte, C.Armando: On the enrichment zone size for optimal convergence rate of the generalized/extended finite element method (2016)
  12. Lian, Haojie; Kerfriden, Pierre; Bordas, Stéphane P.A.: Implementation of regularized isogeometric boundary element methods for gradient-based shape optimization in two-dimensional linear elasticity (2016)
  13. Malekan, Mohammad; Barros, Felicio Bruzzi: Well-conditioning global-local analysis using stable generalized/extended finite element method for linear elastic fracture mechanics (2016)
  14. Nguyen, Vinh Phu; Nguyen, Chi Thanh; Bordas, Stéphane; Heidarpour, Amin: Modelling interfacial cracking with non-matching cohesive interface elements (2016)
  15. Stapór, Pawel: A two-dimensional simulation of solidification processes in materials with thermo-dependent properties using XFEM (2016)
  16. Yang, Gang; Hu, Dean; Ma, Guowei; Wan, Detao: A novel integration scheme for solution of consistent mass matrix in free and forced vibration analysis (2016)
  17. Brandstetter, Gerd; Govindjee, Sanjay: A high-order immersed boundary discontinuous-Galerkin method for Poisson’s equation with discontinuous coefficients and singular sources (2015)
  18. Cano, Alfredo; Moreno, Carlos: A new method for numerical integration of singular functions on the plane (2015)
  19. Cuba Ramos, Aurelia; Aragón, Alejandro M.; Soghrati, Soheil; Geubelle, Philippe H.; Molinari, Jean-François: A new formulation for imposing Dirichlet boundary conditions on non-matching meshes (2015)
  20. Élie-Dit-Cosaque, Xavier J.-G.; Gakwaya, Augustin; Naceur, Hakim: Smoothed finite element method implemented in a resultant eight-node solid-shell element for geometrical linear analysis (2015)

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Further publications can be found at: http://www.xfem.rwth-aachen.de/Project/Publications/PRJ_Publications.php