Showing papers in "Finite Elements in Analysis and Design in 2020"

TL;DR: Three stochastic approaches to generating diverse and competitive designs by penalizing elemental sensitivities, changing initial designs, and integrating the genetic algorithm into the bi-directional evolutionary structural optimization (BESO) technique are proposed.

TL;DR: In this paper, a numerical approach based on the phase-field diffusive model was utilized in a micromechanical pressure-dependent plasticity context using Rousselier damage criterion and implemented within the finite element framework.

TL;DR: In this paper, an implementation of the coupled criterion (CC) for crack initiation simulation in the commercial finite element (FE) code Abaqus/Standard is proposed, which allows crack initiation by fulfilling simultaneously a stress and an energy conditions, which results in the determination of the loading level and crack length at initiation.

TL;DR: This article proposes an efficient continuum topology optimization method on the basis of the design philosophy of robust fail-safe structure and develops an extended variable update scheme within the framework of Optimality Criteria method.

TL;DR: The virtual domain approximation as mentioned in this paper is a physics-based rationale for spatial reduction of the domain in the thermal finite-element analysis at the part scale, which sets the path to a fully virtualized model, considering an upwards-moving domain covering the last printed layers.

TL;DR: The mesh dependencies are shown to be eliminated with simple modification to the real characteristic length of the T6 element in the CEM framework, indicating the effectiveness and robustness of this approach.

TL;DR: A novel data-driven nonlinear solver (DDNS) for solid mechanics using time series forecasting is first proposed and the high accuracy, efficiency and stability of the proposed method are confirmed.

TL;DR: In this paper, the authors employed the bending strip method to connect the patches in the structure of a thin shell to eliminate the strict demand of the C1 continuity condition, which is postulated in the Kirchhoff-love theory for thin shell, and therefore enabled them to use the standard multi-patch structure even with C0 continuity along the patch boundaries.

TL;DR: In this article, an adaptive curved virtual element method (ACVEM) is proposed to combine an exact representation of the involved computational geometry and a dynamic tuning of the optimal mesh resolution through a robust and efficient residual-based a-posteriori error estimator.

TL;DR: A CFD framework combining consistency and efficiency for the numerical simulation of high Reynolds number flows encountered in engineering applications for aerodynamics is proposed, capable of handling highly stretched anisotropic elements and shown to successfully predict both mean and fluctuating drag/lift coefficients.

TL;DR: In this article, the displacement field in the thickness direction with polynomials is assumed to be approximated by a 2D mesh-free method, and a number of hierarchical models are constructed by sequentially increasing the model level.

TL;DR: In this article, the conduction-radiation coupling characteristics within different SiC-based open-cell cellular ceramics surrounded by fictitious vacuum up to temperatures of 1800 K were analyzed.

TL;DR: This work employs a multi-level hierarchical data structure imposing Dirichlet nodes to manage the so-called hanging nodes, based on performing quasi-optimal unrefinements of the basis functions in the energy norm to minimize the complexity and implementational efforts.

TL;DR: In this paper, a numerical model to take into account the effect of the stress state on the bond behavior between steel and concrete in reinforced concrete structures is proposed, based on a zero thickness element, adapted to large scale simulations and the use of 1D elements for steel bars.

TL;DR: In this paper, a single track deposition of IN718 with a varying cross section has been modelled using the proposed approach, which allows varying process parameters to be included in the model, to predict the transient track geometry and the associated thermomechanical effects of the process.

TL;DR: A novel extension of the linear elastic analysis to the viscoelastic one in terms of the multiscale finite element method (MsFEM) is proposed, which provides a versatile tool for the numerical modeling of asphalt concrete.

TL;DR: In this paper, the wave finite element method has been applied for waveguides and periodic structures with advantages in the calculation time, however, this method cannot be applied easily if the structure is subjected to complex or density loads and this is the aim of this article.

TL;DR: The developed plug-in for estimation of the effective properties of heterogeneous three-dimensional periodic media using the asymptotic homogenization method (AHM) is user-friendly and requires only basic skills in ABAQUS™.

TL;DR: The work presented herein aims at accelerating global optimization by using the framework of Bayesian optimization on a quantity of interest together with multiple levels of fidelity by using a model-order reduction framework: the LATIN Proper Generalized Decomposition.

TL;DR: In this paper, the impact resistance of reinforced concrete structures was investigated using experiments in combination with 3D non-linear finite element (FE) simulations, and it was shown that the addition of fibres reduced crack spacing, crack widths and midpoint deflections.

TL;DR: In this article, a semi-analytical interval method for static response bounds analysis of structures subjected to spatially uncertain loads is proposed, in which the external loads applied to the structure are spatial uncertain but bounded, which are quantified by an interval field model using upper and lower bounds.

TL;DR: In this article, a new strongly objective expression for the average deformation rate during a time step was developed and shown to correct the observed errors in tests of strong objectivity, and two types of evolution equations based on the Jaumann derivative were examined.

TL;DR: In this article, a stability-enhanced peridynamic (PD) element is proposed to couple NSPD with finite element method (FEM) for fracture analysis, where only the areas where cracks may initiate or propagate are solved with the proposed PD element, while the rest of the model is composed of conventional finite elements.

TL;DR: In this article, a robust numerical algorithm for integrating the evolution equations for the microstructural vectors is presented, which can be easily implemented into computer codes to simplify the use of general anisotropic constitutive equations for thermoelastic-inelastic material response.

TL;DR: In this paper, a position-based finite element formulation for incompressible Newtonian flows under total Lagrangian description is proposed, which uses current nodal positions as main variable instead of nodal velocities.

TL;DR: By virtue of the proposed DNS, an inverse analysis based procedure is designed to estimate the effective viscoelastic properties, and two indicators are proposed to evaluate the effectiveness of estimation.

TL;DR: In this paper, the authors explored the ability of an explicit time integration procedure to simulate the dynamics of shear rupture between unbounded elastic blocks on frictional interface, modeled with the finite element method.

TL;DR: Sum factorization is extended to the construction of DPG matrices on prismatic elements by expressing prism shape functions as tensor products of 2D simplex and 1D interval shape functions, achieving the same O ( p 7 ) complexity as sum factorization on fully-tensorized hexahedra shape functions.

TL;DR: A Chimera approach for overlapping grids in the finite element method (FEM) context is proposed to optimize the arrangement of several cooling passages within the vane to minimize its average temperature, thereby improving the thermal transfer efficiency.

TL;DR: In this article, a multiphysics simulation framework (MOOSE) is proposed to simulate restrained ring shrinkage and cracking of cementitious materials in a 3D numerical model, which analyzes residual stress development and crack initiation/propagation in cement pastes by applying an eigenstrain which varies over the depth of the specimen based on the relative humidity of the pores.