Journal ArticleDOI
Analysis of a heterogeneous multiscale fem for problems in elasticity
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TLDR
In this paper, a finite element method (FEM) is used to discretize the physical problem of linear elasticity in a macroscopic FEM coupled with a microscopic FEM resolving the micro scale on small cells or patches.Abstract:
This paper is concerned with a finite element method (FEM) for multiscale problems in linear elasticity. We propose a method which discretizes the physical problem directly by a macroscopic FEM, coupled with a microscopic FEM resolving the micro scale on small cells or patches. The assembly process of the unknown macroscopic model is done without iterative cycles. The method allows to recover the macroscopic properties of the material in an efficient and cheap way. The microscale behavior can be reconstructed from the known micro and macro solutions. We give a fully discrete convergence analysis for the proposed method which takes into account the discretization errors at both micro and macro levels. In the case of a periodic elastic tensor, we give a priori error estimates for the displacement and for the macro and micro strains and stresses as well as an error estimate for the numerical homogenized tensor.read more
Citations
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Journal ArticleDOI
The heterogeneous multiscale method
TL;DR: The heterogeneous multiscales method (HMM), a general framework for designing multiscale algorithms, is reviewed and emphasis is given to the error analysis that comes naturally with the framework.
The finite element heterogeneous multiscale method: a computational strategy for multiscale PDEs
TL;DR: Finite element methods based on the HMM for multiscale partial differential equations (PDEs) for porous media flow, biology and material sciences are discussed.
Journal ArticleDOI
Finite element heterogeneous multiscale method for the wave equation
Assyr Abdulle,Marcus J. Grote +1 more
TL;DR: In this article, a finite element heterogeneous multiscale method for the wave equation with highly oscillatory coefficients is proposed, which is based on discretization of an effective wave equation at the macro scale, whose a priori unknown effective coefficients are computed on sampling domains at the micro scale within each macro finite element.
Journal ArticleDOI
Adaptive reduced basis finite element heterogeneous multiscale method
Assyr Abdulle,Yun Bai +1 more
TL;DR: This paper presents a residual-based a posteriori error analysis in the energy norm as well as an a posterioru error analysisIn quantities of interest for both type of adaptive strategies and demonstrates the improvements compared to the adaptive FE-HMM.
Journal ArticleDOI
Localized orthogonal decomposition method for the wave equation with a continuum of scales
TL;DR: A new multiscale method for the wave equation that does not require any assumptions on space regularity or scale-separation and is formulated in the framework of the Localized Orthogonal Decomposition (LOD).
References
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Journal ArticleDOI
FE2 multiscale approach for modelling the elastoviscoplastic behaviour of long fibre SiC/Ti composite materials
TL;DR: In this paper, a multiscale behaviour model based on a multilevel finite element (FE2) approach is used to take into account heterogeneities in the behaviour between the fibre and matrix.
Journal ArticleDOI
An approach to micro-macro modeling of heterogeneous materials
TL;DR: A micro-macro strategy suitable for modeling the mechanical response of heterogeneous materials at large deformations and non-linear history dependent material behaviour is presented and its performance is illustrated by the simulation of pure bending of porous aluminum.
Book
Mathematical Problems in Elasticity and Homogenization
TL;DR: In this paper, the authors present an extension of the Dirichlet problem for the case of Perforated Domains with a Non-Periodic Structure, where the boundary value problem is solved with Neumann conditions on the outer part of the boundary and on the surface of the Cavities.
Journal ArticleDOI
The Heterognous Multiscale Methods
Weinan E,Björn Engquist +1 more
TL;DR: The heterogenous multiscale method (HMM) as mentioned in this paper is a general methodology for the efficient numerical computation of problems with multiscales and multiphysics on multigrids.
Journal ArticleDOI
Prediction of the mechanical behavior of nonlinear heterogeneous systems by multi-level finite element modeling
TL;DR: In this paper, an accurate homogenization method that accounts for large deformations and viscoelastic material behavior on microscopic and macroscopic levels is presented, assuming local spatial periodicity of the microstructure.