Showing papers in "Finite Elements in Analysis and Design in 2017"

TL;DR: A two and three dimensional phase-field method in the commercial finite element code Abaqus/Standard based on the rate-independent variational principle of diffuse fracture that can simulate curvilinear fracture paths, branching and even crack coalescence is implemented.

TL;DR: This work uses edges to drive the division process and introduces a nodal numbering that maximizes the trapezoid quality created by each mid-edge node.

TL;DR: This construction is alternative to the usual monomial basis used in the classical construction of the VEM and is designed in order to improve numerical stability, thus requiring a rather moderate additional numerical cost.

TL;DR: In this paper, the forced rigidity method was used to model melting, flow, and subsequent solidification in all three spatial dimensions of a powder bed additive manufacturing process, including a sophisticated finite element model that is validated with in-house experiments.

TL;DR: In this paper, the influence of laser welding heat input on residual stress and welding distortion of stainless thin sheets were investigated by experiment and simulation, where X-ray diffraction (XRD) and contour method were used to measure the surficial and internal residual stress respectively.

TL;DR: In this article, a 3D finite element Coupled Eulerian-Lagrangian (CEL) model of orthogonal cutting is presented, which faithfully reproduces the experimental operation and is verified by comparison with it such a model and a comparison are not available in the current literature.

TL;DR: In this paper, a family of convected particle domain interpolations (CPDIs) within the framework of the material point method (MPM) is presented, including two dimensional triangular, quadrilateral, and polygonal CPDIs and three dimensional tetrahedron and polyhedron CPDI.

TL;DR: A new method named Conforming to Interface Structured Adaptive Mesh Refinement (CISAMR) for the automated finite element modeling of problems with complex morphologies using a non-iterative algorithm that can easily handle special cases such as intersecting boundaries/interfaces.

TL;DR: In this paper, a numerical strategy for describing the textile/concrete bond behavior in textile-reinforced concrete (TRC) composites that separates the cohesive and coulomb friction contributions is presented.

TL;DR: An orthotropic constitutive model is developed in order to capture the complex response of unidirectional fibrous materials with arbitrary orientation under a three-dimensional (3D) stress state and it is utilised to analyse the non-linear mechanical response of bulk or laminated timber.

TL;DR: A new two-stage methodology (Offline/Online) is proposed to make highly efficient dynamic simulations which notably reduces the computational cost without any loss in accuracy and makes it possible to successfully carry out very efficient optimizations or even Hardware in the Loop simulations with real-time requirements.

TL;DR: In this article, an extended bi-directional evolutionary structural optimization (BESO) method is applied to static structural design problems considering the interaction between viscous fluid flows and linearly elastic structures.

TL;DR: In this article, an enhanced 8-node hexahedral element based on the concept of consecutive interpolation procedure (CIP) is developed for the analysis of 3D linear solids and composite structures.

TL;DR: In this paper, a density-based topology optimization framework for the design of energy absorbing structures with pressure-dependent yield behavior is presented, where the plastic work is maximized while the accumulation of damage is managed through the use of macroscopic fracture constraints.

TL;DR: The flexibility of the VEM in handling polygonal meshes is used to easily generate a conforming mesh even in the case of intricate DFNs, and some tests on fairly complex networks are reported showing its applicability and effectiveness.

TL;DR: This work performs an analysis of the experiments using finite elements obtaining an insight which permits a very simple iterative procedure to determine the stress-strain behavior of the material and, thereafter, the corresponding What-You-Prescribe-Is-What-you-Get (WYPiWYG) stored energy densities.

TL;DR: In this article, a multi-material topology optimization is presented to develop structures involving multiple materials, where the density approach is applied to obtain the distribution of viscoelastic and structural material simultaneously.

TL;DR: In this paper, a new topology optimization approach based on the moving morphable components (MMC) framework with an explicitly described a layout through a finite number of components was proposed.

TL;DR: In this paper, an experimental and numerical study by XFEM of double-lap joints, in which adhesives ranging from brittle and strong, as the case of the Araldite® AV138, to more ductile adhesive, such as the Sikaforce® 7888, are applied.

TL;DR: In this paper, a transient coupled thermo-mechanical finite element (FE) model is developed to compute the plastic deformation of rotating band and the performance of interior ballistics.

TL;DR: In this paper, a penalty-based finite element framework is developed to enable solution of general problems for linear elastic isotropic materials under plane strain conditions within consistent couple stress theory (C-CST).

TL;DR: The implementation of the explicit dynamics a global–local multi-scale method based on domain decomposition using its co-simulation features to couple two separate Abaqus/Explicit analyses, running at different scales is presented.

TL;DR: In this paper, a model accounting for both stress triaxiality and Lode angle is proposed to predict the evolution of the voids volume after each forming stage, based on an advanced multiscale approach.

TL;DR: In this paper, the authors proposed a connectivity constraint in the Bi-directional Evolutionary Structural Optimization (BESO) method, which avoids the possibility of arriving at highly non-optimal local optima.

TL;DR: In this article, a crystal plasticity behavior law has been implemented and its parameters have been identified, for each of the two phases constituting the material, through experimental tests conducted under extreme conditions of temperature and strain rates.

TL;DR: In this paper, a new numerical method has been developed in the context of enriched finite element methods (FEMs) to analyze wave propagation in fractured media, which combines the advantages of global enrichment with harmonic functions via the Generalized FEM (GFEM) with the efficacy of the Phantom Node Method (PNM) to model cracks independently of the mesh.

TL;DR: This paper presents a numerical strategy for calculating the local multiaxial fatigue damage based on the frequency formulation of the sines criterion developed in the laboratory and a finite element example is used to illustrate the application of the proposed strategy.

TL;DR: In this paper, a full thermo-mechanical multiscale methodology is presented, covering the nano-, micro-, and macroscopic scales, where fundamental material properties are determined by means of molecular dynamics simulations that are consequently implemented at the micro-structural level by using finite element analyses.

TL;DR: In this paper, an alternative solid finite element formulation for large deformation analysis of viscoelastic materials is proposed based on positions and makes possible a robust implementation of an isoparametric solid tetrahedral that presents no locking when dealing with complex stress, strain and strain rate for general structural analysis.

TL;DR: The proposed methodology allows prosthesis geometries to be easily introduced in the model providing a useful tool for evaluating the effect of future implants in a preoperative framework, and the potential of this kind of technology is presented by mean of an initial implementation in 2D and 3D for linear elasticity problems.