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) OPUS4-3313 Wissenschaftlicher Artikel Nguyen, V.P.; Kerfriden, Pierre; Bordas, Stéphane Pierre Alain; Rabczuk, Timon Isogeometric analysis suitable trivariate NURBS representation of composite panels with a new offset algorithm Isogeometric analysis suitable trivariate NURBS representation of composite panels with a new offset algorithm Computer-Aided Design Institut für Strukturmechanik (ISM) OPUS4-3395 Wissenschaftlicher Artikel Nguyen-Thanh, Nhon; Nguyen-Xuan, Hung; Bordas, Stéphane Pierre Alain; Rabczuk, Timon Isogeometric analysis using polynomial splines over hierarchical T-meshes for two-dimensional elastic solids Isogeometric analysis using polynomial splines over hierarchical T-meshes for two-dimensional elastic solids 16 Computer Methods in Applied Mechanics and Engineering 1892 1908 Institut für Strukturmechanik (ISM) OPUS4-3396 Wissenschaftlicher Artikel Nguyen-Thanh, Nhon; Rabczuk, Timon; Nguyen-Xuan, Hung; Bordas, Stéphane Pierre Alain An alternative alpha finite element method with stabilized discrete shear gap technique for analysis of Mindlin-Reissner plates An alternative alpha finite element method with stabilized discrete shear gap technique for analysis of Mindlin-Reissner plates 16 Finite Elements in Analysis & Design 519 535 Institut für Strukturmechanik (ISM) OPUS4-3407 Wissenschaftlicher Artikel Nguyen-Thanh, Nhon; Rabczuk, Timon; Nguyen-Xuan, Hung; Bordas, Stéphane Pierre Alain An alternative alpha finite element method (A?FEM) free and forced vibration analysis of solids using triangular meshes An alternative alpha finite element method (A?FEM) free and forced vibration analysis of solids using triangular meshes 23 Journal of Computational and Applied Mathematics 2112 2135 Institut für Strukturmechanik (ISM) OPUS4-3384 Wissenschaftlicher Artikel Nguyen-Vinh, H.; Bakar, I.; Msekh, Mohammed Abdulrazzak; Song, Jeong-Hoon; Muthu, Jacob; Zi, Goangseup; Le, P.; Bordas, Stéphane Pierre Alain; Simpson, R.; Natarajan, S.; Lahmer, Tom; Rabczuk, Timon Extended Finite Element Method for Dynamic Fracture of Piezo-Electric Materials We present an extended finite element formulation for dynamic fracture of piezo-electric materials. The method is developed in the context of linear elastic fracture mechanics. It is applied to mode I and mixed mode-fracture for quasi-steady cracks. An implicit time integration scheme is exploited. The results are compared to results obtained with the boundary element method and show excellent agreement. 12 Engineering Fracture Mechanics 19 31 10.1016/j.engfracmech.2012.04.025 Institut für Strukturmechanik (ISM) OPUS4-3378 Wissenschaftlicher Artikel Nguyen-Xuan, Hung; Liu, G.R.; Bordas, Stéphane Pierre Alain; Natarajan, S.; Rabczuk, Timon An adaptive singular ES-FEM for mechanics problems with singular field of arbitrary order An adaptive singular ES-FEM for mechanics problems with singular field of arbitrary order 21 Computer Methods in Applied Mechanics and Engineering 252 273 Institut für Strukturmechanik (ISM) OPUS4-3324 Wissenschaftlicher Artikel Nguyen-Xuan, Hung; Nguyen, Hiep Vinh; Bordas, Stéphane Pierre Alain; Rabczuk, Timon; Duflot, Marc A cell-based smoothed finite element method for three dimensional solid structures This paper extends further the strain smoothing technique in finite elements to 8-noded hexahedral elements (CS-FEM-H8). The idea behind the present method is similar to the cell-based smoothed 4-noded quadrilateral finite elements (CS-FEM-Q4). In CSFEM, the smoothing domains are created based on elements, and each element can be further subdivided into 1 or several smoothing cells. It is observed that: 1) The CS-FEM using a single smoothing cell can produce higher stress accuracy, but insufficient rank and poor displacement accuracy; 2) The CS-FEM using several smoothing cells has proper rank, good displacement accuracy, but lower stress accuracy, especially for nearly incompressible and bending dominant problems. We therefore propose 1) an extension of strain smoothing to 8-noded hexahedral elements and 2) an alternative CS-FEM form, which associates the single smoothing cell issue with multi-smoothing cell one via a stabilization technique. Several numerical examples are provided to show the reliability and accuracy of the present formulation. 12 KSCE Journal of Civil Engineering 1230 1242 10.1007/s12205-012-1515-7 Institut für Strukturmechanik (ISM) OPUS4-3401 Wissenschaftlicher Artikel Nguyen-Xuan, Hung; Rabczuk, Timon; Nguyen-Thanh, Nhon; Nguyen-Thoi, T.; Bordas, Stéphane Pierre Alain A node-based smoothed finite element method (NS-FEM) for analysis of Reissner-Mindlin plates A node-based smoothed finite element method (NS-FEM) for analysis of Reissner-Mindlin plates 22 Computational Mechanics 679 701 Institut für Strukturmechanik (ISM) OPUS4-3393 Wissenschaftlicher Artikel Simpson, R.; Bordas, Stéphane Pierre Alain; Trevelyan, J.; Kerfriden, Pierre; Rabczuk, Timon An Isogeometric Boundary Element Method for elastostatic analysis The concept of isogeometric analysis, where functions that are used to describe geometry in CAD software are used to approximate the unknown fields in numerical simulations, has received great attention in recent years. The method has the potential to have profound impact on engineering design, since the task of meshing, which in some cases can add significant overhead, has been circumvented. Much of the research effort has been focused on finite element implementations of the isogeometric concept, but at present, little has been seen on the application to the Boundary Element Method. The current paper proposes an Isogeometric Boundary Element Method (BEM), which we term IGABEM, applied to two-dimensional elastostatic problems using Non-Uniform Rational B-Splines (NURBS). We find it is a natural fit with the isogeometric concept since both the NURBS approximation and BEM deal with quantities entirely on the boundary. The method is verified against analytical solutions where it is seen that superior accuracies are achieved over a conventional quadratic isoparametric BEM implementation. Computer Methods in Applied Mechanics and Engineering 10.1016/j.cma.2011.08.008 Institut für Strukturmechanik (ISM) OPUS4-3363 Wissenschaftlicher Artikel Talebi, Hossein; Silani, Mohammad; Bordas, Stéphane Pierre Alain; Kerfriden, Pierre; Rabczuk, Timon Molecular Dynamics/XFEM Coupling by a Three-Dimensional Extended Bridging Domain with Applications to Dynamic Brittle Fracture Molecular Dynamics/XFEM Coupling by a Three-Dimensional Extended Bridging Domain with Applications to Dynamic Brittle Fracture International Journal for Multiscale Computational Engineering Institut für Strukturmechanik (ISM) OPUS4-3327 Wissenschaftlicher Artikel Talebi, Hossein; Silani, Mohammad; Bordas, Stéphane Pierre Alain; Kerfriden, Pierre; Rabczuk, Timon A computational library for multiscale modeling of material failure A computational library for multiscale modeling of material failure Computational Mechanics Institut für Strukturmechanik (ISM) OPUS4-3345 Wissenschaftlicher Artikel Thai, Chien H.; Ferreira, A.J.M.; Bordas, Stéphane Pierre Alain; Rabczuk, Timon; Nguyen-Xuan, Hung Isogeometric analysis of laminated composite and sandwich plates using a new inverse trigonometric shear deformation theory Isogeometric analysis of laminated composite and sandwich plates using a new inverse trigonometric shear deformation theory 19 European Journal of Mechanics 89 108 Institut für Strukturmechanik (ISM) OPUS4-3292 Wissenschaftlicher Artikel Thai, Chien H.; Nguyen-Xuan, Hung; Bordas, Stéphane Pierre Alain; Nguyen-Thanh, Nhon; Rabczuk, Timon Isogeometric analysis of laminated composite plates using the higher-order shear deformation theory Isogeometric analysis of laminated composite plates using the higher-order shear deformation theory 18 Mechanics of Advanced Materials and Structures 451 469 Institut für Strukturmechanik (ISM) OPUS4-3375 Wissenschaftlicher Artikel Valizadeh, Navid; Natarajan, S.; Gonzalez-Estrada, O.A.; Rabczuk, Timon; Tinh Quoc, Bui; Bordas, Stéphane Pierre Alain NURBS-based finite element analysis of functionally graded plates: static bending, vibration, buckling and flutter NURBS-based finite element analysis of functionally graded plates: static bending, vibration, buckling and flutter 17 Composite Structures 309 326 Institut für Strukturmechanik (ISM) OPUS4-3294 Wissenschaftlicher Artikel Yang, Shih-Wei; Budarapu, Pattabhi Ramaiah; Mahapatra, D.R.; Bordas, Stéphane Pierre Alain; Zi, Goangseup; Rabczuk, Timon A Meshless Adaptive Multiscale Method for Fracture A Meshless Adaptive Multiscale Method for Fracture 13 Computational Materials Science 382 395 Institut für Strukturmechanik (ISM)