Two-scale finite element modelling of reinforced concrete structures: Effective response and subscale fracture development
Sign Up to like & getrecommendations! Published in 2018 at "International Journal for Numerical Methods in Engineering"
DOI: 10.1002/nme.5776
Abstract: A two-scale model is derived from a fully resolved model where the response of concrete, steel reinforcement, and bond between them are considered. The pertinent “effective” large-scale problem is derived from selective homogenisation in terms… read more here.
Keywords: two scale; reinforced concrete; dirichlet; response ... See more keywords
LatticeGraphNet: a two-scale graph neural operator for simulating lattice structures
Sign Up to like & getrecommendations! Published in 2024 at "Engineering with Computers"
DOI: 10.1007/s00366-024-02034-7
Abstract: This study introduces a two-scale graph neural operator (GNO), namely, LatticeGraphNet (LGN), designed as a surrogate model for costly nonlinear finite-element simulations of three-dimensional latticed parts and structures. LGN has two networks: LGN-i, learning the… read more here.
Keywords: operator; graph neural; latticegraphnet two; two scale ... See more keywords
Efficient and accurate two-scale FE-FFT-based prediction of the effective material behavior of elasto-viscoplastic polycrystals
Sign Up to like & getrecommendations! Published in 2018 at "Computational Mechanics"
DOI: 10.1007/s00466-017-1476-2
Abstract: Recently, two-scale FE-FFT-based methods (e.g., Spahn et al. in Comput Methods Appl Mech Eng 268:871–883, 2014; Kochmann et al. in Comput Methods Appl Mech Eng 305:89–110, 2016) have been proposed to predict the microscopic and… read more here.
Keywords: two scale; fft based; elasto viscoplastic; scale fft ... See more keywords
Two-scale shape optimisation based on numerical homogenisation techniques and variational sensitivity analysis
Sign Up to like & getrecommendations! Published in 2021 at "Computational Mechanics"
DOI: 10.1007/s00466-020-01955-6
Abstract: This contribution presents a theoretical and computational framework for two-scale shape optimisation of nonlinear elastic structures. Particularly, minimum compliance optimisation problems with composite (matrix-inclusion) microstructures subjected to static loads and volume-type design constraints are focused.… read more here.
Keywords: shape; sensitivity analysis; two scale; optimisation ... See more keywords
Two-Scale Geomechanics of Carbonates
Sign Up to like & getrecommendations! Published in 2018 at "Rock Mechanics and Rock Engineering"
DOI: 10.1007/s00603-018-1536-8
Abstract: The geomechanical characterization of a carbonate reservoir is required for formation stimulation and hydrocarbon recovery. The pertinent core- or block-scale (large-scale) characterizations are time consuming and expensive, and more importantly, cannot be used for drill… read more here.
Keywords: large scale; two scale; scale geomechanics; geomechanics carbonates ... See more keywords
Two-scale analysis of the permeability of 3D periodic granular and fibrous media
Sign Up to like & getrecommendations! Published in 2019 at "Acta Mechanica"
DOI: 10.1007/s00707-019-02470-3
Abstract: In this paper, a numerical study of slow flow through a filter viewed as a porous medium made of arrays of cubic solid particles or solid fibers of square cross section is considered. A double-scale… read more here.
Keywords: granular fibrous; scale analysis; permeability; two scale ... See more keywords
Localized Modes Due to Defects in High Contrast Periodic Media Via Two-Scale Homogenization
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Mathematical Sciences"
DOI: 10.1007/s10958-018-3877-y
Abstract: The spectral problem for an infinite periodic medium perturbed by a compact defect is considered. For a high contrast small ε-size periodicity and a finite size defect we consider the critical ε2-scaling for the contrast.… read more here.
Keywords: two scale; scale homogenization; contrast; localized modes ... See more keywords
Two-scale command shaping for feedforward control of nonlinear systems
Sign Up to like & getrecommendations! Published in 2018 at "Nonlinear Dynamics"
DOI: 10.1007/s11071-018-4098-0
Abstract: This paper presents a critical analysis of the two-scale command shaping (TSCS) feedforward control technique as applied to nonlinear Duffing oscillators. TSCS is an approach for tailoring a flexible system’s applied control input to reduce… read more here.
Keywords: two scale; command; feedforward control; nonlinear systems ... See more keywords
Thermo-mechanical coupling analysis of statistically inhomogeneous porous materials with surface radiation by second-order two-scale method
Sign Up to like & getrecommendations! Published in 2017 at "Composite Structures"
DOI: 10.1016/j.compstruct.2017.09.050
Abstract: Abstract A novel second-order two-scale method is developed to predict thermo-mechanical coupling performance of statistically inhomogeneous porous materials. For these materials, the sophisticated microstructure information of pores, including their shapes, orientations, sizes, spatial distributions, volume… read more here.
Keywords: two scale; second order; thermo mechanical; mechanical coupling ... See more keywords
A two-scale generalized FEM for the evaluation of stress intensity factors at spot welds subjected to thermomechanical loads
Sign Up to like & getrecommendations! Published in 2019 at "Engineering Fracture Mechanics"
DOI: 10.1016/j.engfracmech.2019.03.027
Abstract: Abstract This paper presents a two-scale Generalized Finite Element Method with global-local enrichments (GFEMgl) for the evaluation of stress intensity factors (SIFs) at spot welds subjected to thermomechanical loads. The method uses the solution of… read more here.
Keywords: stress intensity; evaluation stress; scale generalized; intensity factors ... See more keywords
Mathematical modeling of junctions in fluid mechanics via two-scale convergence
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Mathematical Analysis and Applications"
DOI: 10.1016/j.jmaa.2019.123399
Abstract: Abstract We derive the effective models for describing the behavior of the fluid in 1D-1D junctions (pipes) and 2D-2D junctions. Starting from the Navier-Stokes system in thin domain and using the two-scale convergence, we justify… read more here.
Keywords: mathematical modeling; modeling junctions; scale convergence; two scale ... See more keywords