Showing papers on "Extended finite element method published in 2022"
TL;DR: An effective approach is proposed to predict the remaining fatigue life (RFL) of structures with stochastic parameters using the ensemble learning algorithm, which employed multiple machine-learning algorithms to learn useful degradation patterns of the structures from the XFEM datasets.
19 citations
TL;DR: In this paper , a novel element is derived to deal with absorbing boundary conditions in the framework of time-domain finite element method (TDFEM), which combines with the viscoelastic model and modified Newmark algorithm to absorb outgoing waves in unbounded domains.
16 citations
TL;DR: In this paper, a novel element is derived to deal with absorbing boundary conditions in the framework of time-domain finite element method (TDFEM), which combines with the viscoelastic model and modified Newmark algorithm to absorb outgoing waves in unbounded domains.
16 citations
TL;DR: In this paper, a MATLAB-based extended finite elements method (XFEM) model has been utilized to analyze experimental results of fatigue, fracture, and tensile properties of AM fabricated Ti6Al4V alloy to avoid expensive, destructive mechanical characterisation.
15 citations
TL;DR: In this paper , a MATLAB-based extended finite elements method (XFEM) model has been utilized to analyze experimental results of fatigue, fracture, and tensile properties of AM fabricated Ti6Al4V alloy, to avoid expensive and destructive mechanical characterisation.
15 citations
TL;DR: In this article , an energy-based fracture propagation criterion for predicting hydraulic fracture propagation at weak interfaces between contrasting layers is proposed, which takes the directional variation of energy release rate into account, thus providing a detailed analysis of HFs' possible crack paths.
12 citations
TL;DR: In this article , a continuous-discontinuous approach was proposed to provide a discontinuous character to the quasi-brittle fracture process, modeled in a continuous setting through a micromorphic stress-based localizing gradient damage framework.
11 citations
TL;DR: In this article , a hybrid computational strategy and its detailed implementation for simulation of crack propagation problems in 3D solids is presented, which combines the combination of extended finite element method (XFEM) and bond-based peridynamics (PD), which takes excellent features of the high computation efficiency by the XFEM and the flexibility by the PD in dealing with crack growth problems.
11 citations
TL;DR: In this paper , a 3D Extended Finite Element Method (XFEM) model was used to simulate the longitudinal displacement of U-rib-to-diaphragm connections.
11 citations
TL;DR: In this paper , a semi-circular bending (SCB) test is widely used to characterize the fracture behaviors of asphalt mixtures, and an extended finite element modeling (XFEM) model is used to reveal the fracture performance.
11 citations
TL;DR: In this article , the authors present the implementation of the eXtended Finite Element Method (XFEM) in the general-purpose commercial software COMSOL Multiphysics for the first time.
TL;DR: In this paper , the extended finite element method (XFEM) with the local refinement technique using the variable-node element (VNE) is proposed to simulate the fatigue crack propagation under the cyclic loadings, in which the initially generated coarse mesh around the crack tip is refined after the crack propagation and the VNE is used to connect the refined elements and the adjacent elements.
TL;DR: In this paper , the intralaminar crack propagation of unidirectional glass fiber reinforced polymer composite (GFRP) laminate has been investigated by quasi-static tensile/compression experiment and complemented by finite element analysis (FEA).
TL;DR: In this paper , an XFEM-based framework is presented to model the semipermeable crack in magneto-electro-elastic (MEE) material.
TL;DR: In this paper , the authors employed the finite element method for heat and mass transfer of MHD Maxwell nanofluid flow over the stretching sheet under the effects of radiations and chemical reactions.
Abstract: The recent study was concerned with employing the finite element method for heat and mass transfer of MHD Maxwell nanofluid flow over the stretching sheet under the effects of radiations and chemical reactions. Moreover, the effects of viscous dissipation and porous plate were considered. The mathematical model of the flow was described in the form of a set of partial differential equations (PDEs). Further, these PDEs were transformed into a set of nonlinear ordinary differential equations (ODEs) using similarity transformations. Rather than analytical integrations, numerical integration was used to compute integrals obtained by applying the finite element method. The mesh-free analysis and comparison of the finite element method with the finite difference method are also provided to justify the calculated results. The effect of different parameters on velocity, temperature and concentration profile is shown in graphs, and numerical values for physical quantities of interest are also given in a tabular form. In addition, simulations were carried out by employing software that applies the finite element method for solving PDEs. The calculated results are also portrayed in graphs with varying sheet velocities. The results show that the second-order finite difference method is more accurate than the finite element method with linear interpolation polynomial. However, the finite element method requires less number of iterations than the finite difference method in a considered particular case. We had high hopes that this work would act as a roadmap for future researchers entrusted with resolving outstanding challenges in the realm of enclosures utilized in industry and engineering.
TL;DR: In this paper , a crack opening model is proposed to study the role of electrostatic tractions in a cracked semipermeable piezoelectric material, and the extended finite element method (XFEM) is used in conjunction with six-fold electro-mechanical enrichment functions to capture the singularity and the discontinuous surface independent of the background mesh.
TL;DR: In this paper , an eXtended Finite Element Method (XFEM)-based numerical scheme is presented to compute electrical resistivity changes caused by the presence of cracks and the crack growth.
TL;DR: In this paper , the small fatigue crack initiation and propagation behavior of Inconel 617 was studied by in-situ SEM observation, electron back-scattered diffraction (EBSD), digital image correlation (DIC), crystal plasticity finite element method (CPFEM) and extended finite element methods (XFEM).
TL;DR: In this paper , a robust local mesh-refinement scheme of the tip-enriched elements is designed to enhance the resolution of the near-front stress field which is crucial for the determination of crack segmentation and propagation behaviors.
TL;DR: In this article , the frequency response of edge-cracked magneto-electro elastic functionally graded (ECMEE-FG) plates using the extended finite element method (XFEM) was investigated.
TL;DR: In this paper , a stress-based topology optimization of plate structures by using a finite element level set (LS) method is presented. But the singularity phenomenon arising in topology optimisation under stress constraints can be resolved without using any relaxation technique.
Abstract: In this paper, we present a stress-based topology optimization of plate structures by using a finite element level-set (LS) method. Since stress constraints are independent with LS-based design variables, the singularity phenomenon arising in topology optimization under stress constraints can be resolved without using any relaxation technique. The finite element method is used for solving LS-based equations of design variables and the state and adjoint equations of plate structures with arbitrary complex geometries and boundaries of the design domain. To obtain stable finite element solutions without any oscillation, both unsteady LS convection-diffusion equation and LS re-initialization convection-reaction equation are solved using a stabilized least-squares finite element method.
TL;DR: In this paper , an efficient and stable method for crack growth is proposed based on XFEM, where the mixed-mode crack propagation process is simulated accurately and the fatigue life considering the cyclic overload effect is calculated conveniently by using the proposed novel method.
TL;DR: In this paper , an XFEM-based model for simulating 3D non-planar fracture propagation regarding crack front segmentation is presented, and a robust and efficient local mesh refinement scheme is proposed.
TL;DR: In this article , a fast simulation method based on fully coupled XFEM is proposed to handle the low efficiency and poor convergence in simulating the generation of complex fracture networks, and several numerical cases are adopted to illustrate the superiority of the proposed model in computational efficiency.
TL;DR: In this paper , two domain decomposition solvers are proposed for solving the linear systems resulting from XFEM crack propagation analysis in large-scale 3D problems, which are amenable to parallelization and can be implemented in modern parallel computing environments, with multicore processors and distributed memory systems.
TL;DR: In this article, the authors presented a numerically efficient tool for linear buckling predictions of perforated thin-walled bars within the framework of generalized beam theory (GBT), which is achieved by combining the standard GBT and the extended finite element method (X-FEM).
TL;DR: In this article , a field-enriched finite element method (FE-FEM) is proposed to simulate cracking behaviors of brittle solids containing cracks of complex geometries.
TL;DR: In this article , the authors present a new approach to implement a recently proposed optimal order Cut Finite Element Method (CutFEM) for problems with moving embedded solid structures in viscous incompressible flows.
TL;DR: In this paper, a review of the recent advances in fracture mechanics at Northwestern University and Istanbul Technical University is presented, prompted by the recent discovery of the gap test, which makes it easy and unambiguous to determine the effects of crack-parallel stresses on the mode-I fracture energy and, in consequence, on the nominal strength of structures of different sizes.
TL;DR: In this paper , a new approach has been developed to conduct seismic failure analysis of concrete gravity dams using extended finite element method and evaluated numerical parameters of dam-foundation-reservoir system.