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International Journal for Multiscale Computational Engineering

Publicou 6 edições por ano

ISSN Imprimir: 1543-1649

ISSN On-line: 1940-4352

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.4 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.3 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 2.2 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00034 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.46 SJR: 0.333 SNIP: 0.606 CiteScore™:: 3.1 H-Index: 31

Indexed in

NONLINEAR MULTISCALE HOMOGENIZATION OF CARBON NANOTUBE REINFORCED COMPOSITES WITH INTERFACIAL SLIPPAGE

Volume 12, Edição 4, 2014, pp. 271-289
DOI: 10.1615/IntJMultCompEng.2014007258
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RESUMO

A nonlinear hierarchical multiscale approach is proposed in this work, for the characterization of the mechanical and damping properties of carbon nanotube reinforced composites (CNT-RCs) considering slippage at CNT/polymer interface. The proposed numerical strategy encompasses various length scales, from nano to micro to macro. Individual CNTs are modeled at the nanoscale as space frame structures using the modified Molecular Structural Mechanics (mMSM) approach. Then the mMSM model is projected to an equivalent continuum beam element (EBE) which is subsequently used as the basic building block for the construction of full length straight CNTs at the microscale, embedded in a polymer matrix. The interfacial load transfer mechanism between the lateral surface of the CNT and the surrounding polymer is modeled with a nonlinear bond-slip friction-type model. This scheme provides with the finite element model of a Representative Volume Element (RVE) at the microscale in which a nonlinear homogenization scheme is implemented in order to compute effective material properties for the macrocontinuum. A Hill's anisotropic plasticity model is fitted onto the results of finite element analysis of the microstructured RVE model, so that anisotropic stiffness and energy dissipation mechanism, due to the directionality of the CNTs, can be captured by the equivalent macro model. Sensitivity analysis is performed with respect to various weight fractions (wf) of CNTs and interfacial shear strength (ISS) values. Global mechanical and damping properties for the homogenized models are assessed and compared with direct calculations on detailed fine scale models.

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