Engineering Computations, ( ISI ), Volume (31), No (7), Year (2014-9) , Pages (1261-1282)

Title : ( Elastic wave propagation and time history analysis in FG nanocomposite cylinders reinforced by carbon nanotubes using a hybrid mesh-free method )

Authors: Seyed Mahmoud Hosseini ,

Access to full-text not allowed by authors

Citation: BibTeX | EndNote

Abstract

Purpose – The purpose of this paper is to propose a hybrid mesh-free method based on generalized finite difference (GFD) and Newmark finite difference methods to study the elastic wave propagation in functionally graded nanocomposite reinforced by carbon nanotubes (FGNRCN). The presented hybrid mesh-free method is applied for a thick hollow cylinder, which is made of FGNRCN and excited by various mechanical shock loadings. Design/methodology/approach – The FG nanocomposite cylinder is assumed to be under shock loading. The elastic wave propagation is obtained and studied for various nonlinear grading patterns and distributions of the aligned carbon nanotubes. The distribution of carbon naotubes in FG nanocomposite are considered to vary as nonlinear function of radius, which varies with various nonlinear grading patterns continuously through radial direction. The effective material properties of functionally graded carbon nanotube are estimated using a micro-mechanical model. Findings – The mechanical shock analysis of FGNRCN thick hollow cylinder is carried out and the dynamic behavior of displacement field and the time history of radial displacement are obtained for various grading patterns. An effective hybrid mesh-free method based on GFD and Newmark finite difference methods is presented to calculate the average velocity of elastic wave propagation in FGNRCN. The average velocity of elastic wave propagation is obtained for various grading patterns and various kinds of volume fraction. The effects of some parameters on average velocity of elastic wave propagation are obtained and studied in detail. Originality/value – The calculation of elastic radial wave propagation in a FGNRCN thick hollow cylinder is presented using a hybrid mesh-free method. The effects of some parameters on wave propagation such as various grading patterns of distribution of carbon nanotubes are studied in details.

Keywords

, Wave propagation; Functionally graded materials; Mesh, free method; Nanocomposites; Thick hollow cylinder.
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:1043378,
author = {Hosseini, Seyed Mahmoud},
title = {Elastic wave propagation and time history analysis in FG nanocomposite cylinders reinforced by carbon nanotubes using a hybrid mesh-free method},
journal = {Engineering Computations},
year = {2014},
volume = {31},
number = {7},
month = {September},
issn = {0264-4401},
pages = {1261--1282},
numpages = {21},
keywords = {Wave propagation; Functionally graded materials; Mesh-free method; Nanocomposites; Thick hollow cylinder.},
}

[Download]

%0 Journal Article
%T Elastic wave propagation and time history analysis in FG nanocomposite cylinders reinforced by carbon nanotubes using a hybrid mesh-free method
%A Hosseini, Seyed Mahmoud
%J Engineering Computations
%@ 0264-4401
%D 2014

[Download]