Dokument-ID Dokumenttyp Verfasser/Autoren Herausgeber Haupttitel Abstract Auflage Verlagsort Verlag Erscheinungsjahr Seitenzahl Schriftenreihe Titel Schriftenreihe Bandzahl ISBN Quelle der Hochschulschrift Konferenzname Quelle:Titel Quelle:Jahrgang Quelle:Heftnummer Quelle:Erste Seite Quelle:Letzte Seite URN DOI Abteilungen OPUS4-3370 Wissenschaftlicher Artikel Bakar, I.; Kramer, O.; Bordas, Stéphane Pierre Alain; Rabczuk, Timon Optimization of Elastic Properties and Weaving Patterns of Woven Composites Optimization of Elastic Properties and Weaving Patterns of Woven Composites 16 Composite Structures 575 591 Institut für Strukturmechanik (ISM) OPUS4-3318 Wissenschaftlicher Artikel Beex, L.A.A.; Kerfriden, Pierre; Rabczuk, Timon; Bordas, Stéphane Pierre Alain Quasicontinuum-based multiscale approaches for plate-like beam lattices experiencing in-plane and out-of-plane deformation Quasicontinuum-based multiscale approaches for plate-like beam lattices experiencing in-plane and out-of-plane deformation Computer Methods in Applied Mechanics and Engineering Institut für Strukturmechanik (ISM) OPUS4-3325 Wissenschaftlicher Artikel Budarapu, Pattabhi Ramaiah; Gracie, Robert; Bordas, Stéphane Pierre Alain; Rabczuk, Timon An adaptive multiscale method for quasi-static crack growth This paper proposes an adaptive atomistic- continuum numerical method for quasi-static crack growth. The phantom node method is used to model the crack in the continuum region and a molecular statics model is used near the crack tip. To ensure self-consistency in the bulk, a virtual atom cluster is used to model the material of the coarse scale. The coupling between the coarse scale and fine scale is realized through ghost atoms. The ghost atom positions are interpolated from the coarse scale solution and enforced as boundary conditions on the fine scale. The fine scale region is adaptively enlarged as the crack propagates and the region behind the crack tip is adaptively coarsened. An energy criterion is used to detect the crack tip location. The triangular lattice in the fine scale region corresponds to the lattice structure of the (111) plane of an FCC crystal. The Lennard-Jones potential is used to model the atom-atom interactions. The method is implemented in two dimensions. The results are compared to pure atomistic simulations; they show excellent agreement. 19 Computational Mechanics 1129 1148 10.1007/s00466-013-0952-6 Institut für Strukturmechanik (ISM) OPUS4-3342 Wissenschaftlicher Artikel Chen, Lei; Nguyen-Thanh, Nhon; Nguyen-Xuan, Hung; Rabczuk, Timon; Bordas, Stéphane Pierre Alain; Limbert, Georges Explicit finite deformation analysis of isogeometric membranes Explicit finite deformation analysis of isogeometric membranes 26 Computer Methods in Applied Mechanics and Engineering 104 130 Institut für Strukturmechanik (ISM) OPUS4-3390 Wissenschaftlicher Artikel Chen, Lei; Rabczuk, Timon; Liu, G.R.; Zeng, K.Y.; Kerfriden, Pierre; Bordas, Stéphane Pierre Alain Extended finite element method with edge-based strain smoothing (ESm-XFEM) for linear elastic crack growth This paper presents a strain smoothing procedure for the extended finite element method (XFEM). The resulting "edge-based" smoothed extended finite element method (ESm-XFEM) is tailored to linear elastic fracture mechanics and, in this context, to outperform the standard XFEM. In the XFEM, the displacement-based approximation is enriched by the Heaviside and asymptotic crack tip functions using the framework of partition of unity. This eliminates the need for the mesh alignment with the crack and re-meshing, as the crack evolves. Edge-based smoothing (ES) relies on a generalized smoothing operation over smoothing domains associated with edges of simplex meshes, and produces a softening effect leading to a close-to-exact stiffness, "super-convergence" and "ultra-accurate" solutions. The present method takes advantage of both the ES-FEM and the XFEM. Thanks to the use of strain smoothing, the subdivision of elements intersected by discontinuities and of integrating the (singular) derivatives of the approximation functions is suppressed via transforming interior integration into boundary integration. Numerical examples show that the proposed method improves significantly the accuracy of stress intensity factors and achieves a near optimal convergence rate in the energy norm even without geometrical enrichment or blending correction. Computer Methods in Applied Mechanics and Engineering 10.1016/j.cma.2011.08.013 Institut für Strukturmechanik (ISM) OPUS4-3295 Wissenschaftlicher Artikel Ghasemi, Hamid; Kerfriden, Pierre; Bordas, Stéphane Pierre Alain; Muthu, Jacob; Zi, Goangseup; Rabczuk, Timon Interfacial shear stress optimization in sandwich beams with polymeric core using nonuniform distribution of reinforcing ingredients Interfacial shear stress optimization in sandwich beams with polymeric core using nonuniform distribution of reinforcing ingredients 9 Composite Structures 221 230 Institut für Strukturmechanik (ISM) OPUS4-3303 Wissenschaftlicher Artikel Ilyani Akmar, A.B.; Lahmer, Tom; Bordas, Stéphane Pierre Alain; Beex, L.A.A.; Rabczuk, Timon Uncertainty quantification of dry woven fabrics: A sensitivity analysis on material properties Uncertainty quantification of dry woven fabrics: A sensitivity analysis on material properties 16 Composite Structures 1 17 10.1016/j.compstruct.2014.04.014 Institut für Strukturmechanik (ISM) OPUS4-3374 Wissenschaftlicher Artikel Kerfriden, Pierre; Goury, O.; Rabczuk, Timon; Bordas, Stéphane Pierre Alain A partitioned model order reduction approach to rationalise computational expenses in nonlinear fracture mechanics A partitioned model order reduction approach to rationalise computational expenses in nonlinear fracture mechanics 19 Computer Methods in Applied Mechanics and Engineering 169 188 Institut für Strukturmechanik (ISM) OPUS4-3362 Wissenschaftlicher Artikel Kerfriden, Pierre; Schmidt, K.M.; Rabczuk, Timon; Bordas, Stéphane Pierre Alain Statistical extraction of process zones and representative subspaces in fracture of random composites Statistical extraction of process zones and representative subspaces in fracture of random composites International Journal for Multiscale Computational Engineering Institut für Strukturmechanik (ISM) OPUS4-3383 Wissenschaftlicher Artikel Natarajan, S.; Chakraborty, S.; Thangavel, M.; Bordas, Stéphane Pierre Alain; Rabczuk, Timon Size dependent free flexural vibration behavior of functionally graded nanoplates Size dependent free flexural vibration behavior of functionally graded nanoplates 6 Computational Materials Science 74 80 Institut für Strukturmechanik (ISM)