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International Journal for Multiscale Computational Engineering

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ISSN Печать: 1543-1649

ISSN Онлайн: 1940-4352

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EFFECTIVE ELASTIC MODULUS OF PERISTATIC BAR WITH PERIODICALLY DISTRIBUTED DAMAGE

Том 16, Выпуск 1, 2018, pp. 1-18
DOI: 10.1615/IntJMultCompEng.2018022670
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Краткое описание

A basic concept in engineering design is a damage theory which is obtained as a physically natural justification in the framework of peridynamics. The basic feature of the peridynamic model considered is a continuum description of a material behavior as the integrated nonlocal force interactions between infinitesimal material points. In contrast to the classical theories, the peridynamic equation of motion introduced by Silling is free of any spatial derivatives of displacements. The material points interact with each other directly across finite distances through central forces known as "bonds". The damage concept is introduced by permitting these bonds to break irreversibly. A peristatic bar with periodically distributed damage is analyzed by a generalization of the classical locally elastic computational homogenization to its peristatic counterpart. One introduces the new volumetric periodic boundary conditions at the interaction boundary of a representative unit cell whose local limit implies the known locally elastic periodic boundary conditions. The applicability of local elasticity theory is demonstrated for description of effective elastic behavior of this bar. Estimation of the effective moduli of a damaged medium (initially homogeneous) as the functions of the local damage, damage functions, and micromodulus profiles are obtained. One analyzes either the translation invariant damage functions or non-translation-invariant ones (which can be considered as a model of damage localization).

ЦИТИРОВАНО В
  1. Buryachenko Valeriy A., Computational homogenization in linear elasticity of peristatic periodic structure composites, Mathematics and Mechanics of Solids, 24, 8, 2019. Crossref

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