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Computational Mechanics

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01.04.2014 | Original Paper

Extended multiscale finite element method: its basis and applications for mechanical analysis of heterogeneous materials

verfasst von: H. W. Zhang, Y. Liu, S. Zhang, J. Tao, J. K. Wu, B. S. Chen

Erschienen in: Computational Mechanics | Ausgabe 4/2014

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Abstract

Extended multiscale finite element method (EMsFEM) has been proved to be an efficient method for the mechanical analysis of heterogeneous materials. The key factor for efficiency and accuracy of EMsFEM is the numerical base functions (NBFs). The paper summarizes the general method for constructing NBFs and proposes a generalized isoparametric interpolation based on the rigid displacement properties (RDPs) of NBFs. We prove that the NBFs constructed by linear, periodic and rotational angle boundary conditions satisfy the RDPs, which is independent with the shape and material properties of unit cells. The properties of NBFs for oversampling technique are also comprehensively discussed. The algorithm complexity is discussed in theoretical and numerical aspects, which concludes that the computation quantity of EMsFEM is much smaller than the direct solutions. The algorithm is validated by linear analysis of the materials with random impurities and holes and the efficiency is improved further by parallel computing.

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Titel: Extended multiscale finite element method: its basis and applications for mechanical analysis of heterogeneous materials
verfasst von: H. W. Zhang
Y. Liu
S. Zhang
J. Tao
J. K. Wu
B. S. Chen
Publikationsdatum: 01.04.2014
Verlag: Springer Berlin Heidelberg
Erschienen in: Computational Mechanics / Ausgabe 4/2014
Print ISSN: 0178-7675
Elektronische ISSN: 1432-0924
DOI: https://doi.org/10.1007/s00466-013-0924-x

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