Showing papers in "Finite Elements in Analysis and Design in 2018"

TL;DR: In this article, a self-propagating Strong Discontinuity Embedded Approach (SDA) for quasi-brittle fracture is presented, which is based on the Statically Optimal Symmetric formulation (SOS) of the SDA using the 8-node quadrilateral element.

TL;DR: In this paper, a phase field model for fracture has specific regulations regarding the finite element mesh size, and a mesh refinement algorithm by adopting a predictor-corrector mesh refinement strategy is used in both applications of mechanical and thermo-mechanical fracture models.

TL;DR: In this paper, an enhanced platform for large deformation analyses which considers the effect of grain breakage during pile penetration in silica sand is presented, where a model based on critical state theory has been developed within the framework of multisurface plasticity to account in the same constitutive platform the effects of stress dilatancy and particle fragmentation and a stress integration scheme has been adopted by extending a cutting plane algorithm to the model with multiple yielding mechanisms.

TL;DR: The results signify that the method can be used for topology optimization problems involving non-volume constraints without the use of heuristics, Lagrange multipliers and hierarchical mesh refinement.

TL;DR: An effective computational approach that combines an adaptive extended isogeometric analysis (XIGA) method with locally refined (LR) B-splines and level set methods for modeling multiple inclusions in two-dimensional elasticity problems is presented.

TL;DR: In this article, the effects of fiber-matrix debonding and matrix cracking on composite plies were studied using the cohesive zone model and extended finite element method. But the results of the numerical simulation on the damage modes were not validated by the available numerical researches.

TL;DR: The form of the constitutive equations are summarized, the finite element implementation in a Newton-Raphson integration scheme is described in detail and a number of strategies to effectively limit the memory required are proposed.

TL;DR: In this article, elastic stability analysis of curved nanobeams is investigated using the differential constitutive law consequent to Eringen's strain-driven integral model coupled with a higher-order shear deformation theory accounting for through thickness stretching effect.

TL;DR: In this paper, the authors demonstrate how to simulate the process of induction hardening using a commercial finite element software package with focuses on validation of the electromagnetic and thermal parts, together with evolution of the microstructure.

TL;DR: In this paper, the authors proposed a density-based topology optimization of viscoelastic damping layers attached to shell structures for attenuating the amplitude of transient response under dynamic loads.

TL;DR: In this article, the duality between Inverse and Direct Bloch formulations is exploited to build a reduced solution subspace, accounting for both propagating and evanescent behaviors, while ensuring high reduction factors.

TL;DR: In this article, a new adaptive finite element model was successfully developed to simulate fretting corrosion at metallic interfaces, where the Archard wear equation and a previously established electrochemical equation were simultaneously employed.

TL;DR: A novel adaptive time stepping scheme for fluid-structure interaction (FSI) problems that allows for controlling the accuracy of the time-discrete solution and eases practical computations by providing an efficient and very robust time step size selection.

TL;DR: In this article, an improved unified viscoplastic constitutive model taking into account the austenitization degree was developed and the related material constants identified making use of a genetic algorithm-based optimization tool.

TL;DR: In this article, a 3D visco-hyperelastic constitutive equation for the finite deformation of elastomers is developed using a phenomenological strain energy function.

TL;DR: A low-order virtual element formulation for modelling the strain-softening response of quasi-brittle materials, based on minimization of an incremental energy expression, with a novel construction of the stabilization energy for isotropic elasto-damage.

TL;DR: In this paper, a locking-free C 0 NURBS element with selectively reduced integration (SRI) was proposed to preserve the exact curve geometry of 3D curved Timoshenko beams.

TL;DR: An alternative methodology to represent rebars and their bond-slip behavior against concrete based on coupling finite elements is presented, which can be applied to 2D and 3D problems and adapted to other type of finite elements.

TL;DR: In this article, an approach to quickly build a lattice structure made of a large number of struts is presented, which takes advantage of the capabilities of finite element meshers to generate the tessellation of the volume into a series of tetrahedrons whose edges define the struts of the lattice.

TL;DR: A crack orientation criterion for heterogeneous materials based on interface damage prediction in composites is proposed and a phantom node approach has been implemented to model crack propagation to take into account the heterogeneity of the material.

TL;DR: A new hyperelastic material model is proposed for graphene-based structures, such as graphene, carbon nanotubes (CNTs) and carbon nanocones (CNC) based on a set of invariants obtained from the right surface Cauchy-Green strain tensor and a structural tensor.

TL;DR: In this paper, a viscoelastic Perfectly Matched Layer (PML) formulation with Rayleigh-type damping for finite-element time-domain analyses is presented.

TL;DR: A model for unsteady ice build-up and melting is presented and is based on a triple layer assumption and a tailored numerical methodology for solving the governing partial differential equations is described.

TL;DR: A novel non-intrusive a posteriori reduced order strategy for building multiparametric computational vademecum dedicated to real-time simulations of nonlinear thermo-mechanical problems is proposed.

TL;DR: In this article, a prismatic solid-shell is developed for the analysis of shells during forming process and consolidation stage, which is intended to provide an accurate calculation of stress/strain through the thickness.

TL;DR: In this article, the authors deal with certain aspects related to the dynamic behaviour of isotropic shell-like structures analyzed by the use of a higher order transversely deformable shell-type spectral finite element newly formulated and the approach known as the Time-domain Spectral Finite Element Method (TD-SFEM).

TL;DR: The topology of four frame structures featuring moment-resisting connections and member cross-sectional properties mapped from the American Institute of Steel Construction design manual are optimized with the proposed algorithm to verify its effectiveness in optimizing structural performance while maintaining factors of safety against overall and individual member instabilities.

TL;DR: In this paper, the authors proposed a computational model for the numerical simulation of the material transport inside the pressure chamber of Earth Pressure Balance (EPB) machines, where a pressure-dependent viscoplastic fluid is adopted to model the behavior of the soil paste, which is assumed to be a compressible homogeneous mixture.

TL;DR: A key feature of this method is that the enrichment descriptions and the finite element mesh are optimally uncoupled; the element nodes are not enriched facilitating the treatment of crack modeling in object-oriented programs.

TL;DR: In this paper, a finite element solver coupled to a Lattice Boltzmann method is employed, such that the effect of the fluid-structure interactions on the optimised design can be considered.