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International Journal for Multiscale Computational Engineering
Импакт фактор: 1.016 5-летний Импакт фактор: 1.194 SJR: 0.554 SNIP: 0.68 CiteScore™: 1.18

ISSN Печать: 1543-1649
ISSN Онлайн: 1940-4352

Выпуски:
Том 17, 2019 Том 16, 2018 Том 15, 2017 Том 14, 2016 Том 13, 2015 Том 12, 2014 Том 11, 2013 Том 10, 2012 Том 9, 2011 Том 8, 2010 Том 7, 2009 Том 6, 2008 Том 5, 2007 Том 4, 2006 Том 3, 2005 Том 2, 2004 Том 1, 2003

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.v2.i1.10
14 pages

Multiscale Mechanics of Nonlocal Effects in Microheterogeneous Materials

Valeriy A. Buryachenko
Civil Engineering Department, University of Akron, Akron, Ohio 44325-3901, USA and Micromechanics and Composites LLC, 2520 Hingham Lane, Dayton, Ohio 45459, USA

Краткое описание

We consider a linearly thermoelastic composite medium, which consists of a homogeneous matrix containing either deterministic (periodic and non-periodic) or random (statistically homogeneous and inhomogeneous, so-called graded) field of inclusions. For functionally graded materials when the concentration of the inclusions is a function of the coordinates, the micromechanical approach is based on the generalization of the "multiparticle effective field" method, previously proposed for statistically homogeneous random structure composites by the author (see for references and details Buryachenko, Appl. Mech. Reviews 2001, 54, 1-47). Both the Fourier transform method and iteration method are analyzed. The nonlocal integral and differential effective operators of elastic effective properties are estimated. The nonlocal dependencies of the effective elastic moduli as well as of conditional averages of the strains in the components on the concentration of the inclusions in a certain neighborhood of point considered are detected; the scale effect is discovered. The proposed theory provides the bridging of length scales which is a paramount factor in understanding and controlling material microinhomogeneity at the microscale and interpreting them at the macroscale. The combined coupled concept of introducing both the integral and differential operator linking microscale and macroscale enables one to address two issues simultaneously.


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