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
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
A two-scale Langevin PDF model for Richtmyer–Meshkov turbulence with a small Atwood number
Sign Up to like & getrecommendations! Published in 2020 at "Physica D: Nonlinear Phenomena"
DOI: 10.1016/j.physd.2019.132276
Abstract: Abstract In this article, we derive a Langevin probability density function (PDF) model in order to predict turbulent mixing zone evolutions when generated by the Richtmyer–Meshkov instability. The aim of the model is to account… read more here.
Keywords: two scale; atwood number; richtmyer meshkov; pdf model ... See more keywords