Data mining is the search for valuable information in large
volumes of data [1]. With the increase of availability of databases
containing structures, mining techniques especially designed for
this type of data are becoming more and more important [2]. To

improve both software productivity and quality, software engineers

are increasingly applying data mining algorithms to various
Software Engineering tasks [3].

The progress in data acquisition and successful development of

این مطلب را هم بخوانید :

storage technology at cheaper rates, along with limited human
capabilities in analyzing and understanding big databases have

from large amounts of data stored in databases, data warehouses,
or other information repositories. It can be used to help companies

to make better decisions to stay competitive in the marketplace.

این مطلب را هم بخوانید :

viscoelastic materials. Finally several invented cases are run to illustrate the importance
of the viscoelasticity phenomenon on the internal stress field throughout thick laminated
cylinders.
KEYWORDS: Polymer–matrix composites (PMCs); Creep; Elasticity; Analytical

modelling; Durability.

INTRODUCTION
The hollow cylinders or cylinders are very common structural elements, used in many
applications including trusses, hoses, piping systems and drive shafts. The effort to
improve oil production riser performance lead to the possible use of risers made of
polymer matrix composites to bring the oil to surface platforms in the offshore
exploration at waster depth of 2 km or more. Consequently the increasing use of

polymer matrix composites in civil engineering applications has renewed interest in

این مطلب را هم بخوانید :

problems of stress analysis of cylindrical laminated composite structures.
Many analytical works about stress analysis of composite cylindrical shells have been
done during the past years. This is related with the increase use of composite shells in
many applications, such as civil engineering structures and aeronautical industry. The
4

temperature of its internal surface is increased and the

این مطلب را هم بخوانید :

this regard, a remarkable number of studies have been accomplished
to disclose the vibrational behavior of such nano-structures
conveying fluid. Tuzun et al. [5], Amabili et al. [6], Yoon et al. [7],
Natsuki et al. [8], Wang et al. [9], Xia et al. [10] and Wang and Qiao
[11] made important contributions in this practical area. In this research,
we would undertake a reevaluation for computational
modeling of carbon nano-tubes conveying viscous fluid with some
fresh insights as well as we try to develop an innovative one
dimensional (1D) coupled fluid–structure interaction (FSI) equation
by considering slip condition on the nano-tube wall. Khosravian
and Rafii Tabar [12] studied the flow of viscous fluid through a
carbon nano-tube and established a new equation of motion of
pipe conveying fluid by considering the viscosity effect. They found
that a nano-tube conveying a viscous fluid was more stable against
vibration-induced buckling than a nano-tube conveying a non-viscous
fluid. Wang and Ni [13] reappraised the computational modeling
of carbon nano-tube conveying viscous fluid represented by
Khosravian and Rafii Tabar [12] and then corrected the FSI equation
and disclosed that the effect of viscosity of fluid flow on the
vibration and instability of CNTs could be ignored. Lee and Chang
[14] analyzed the influences of nonlocal effect, viscosity effect, aspect
ratio, and elastic medium constant on the fundamental frequency
of a single-walled carbon nano-tube (SWCNT) conveying

viscous fluid embedded in an elastic medium. They revealed that

the frequency increased as the values of the viscosity parameter increased.
Soltani et al. [15] developed a transverse vibrational model
for a viscous fluid-conveying SWCNT embedded in biological soft
tissue. Their investigation determined that the structural instability
and the associated critical flow velocity could be affected by
the viscosity of the fluid and the nonlocal parameter. Khoddami
et al. [16] studied electro-thermo nonlinear vibration and instability
of embedded double-walled Boron Nitride nano-tubes
(DWBNNTs) conveying viscous fluid based on nonlocal piezoelasticity
theory. They reported that increasing the small scale parameter
decreased the real and imaginary parts of frequency and
critical fluid velocity. Furthermore, they concluded that the effect
of fluid viscosity on the vibration and instability of DWBNNTs
might be ignored. In many recent studies various size-dependent
continuum theories have been developed for vibration and stability

analysis of CNTs conveying fluid. Lee and Chang [17], Zhen

این مطلب را هم بخوانید :

0927-0256/$ – see front matter  2013 Elsevier B.V. All rights reserved.
http://dx.doi.org/10.1016/j.commatsci.2013.04.047
⇑ Corresponding author. Tel.: +98 311 391 5248; fax: +98 311 391 2628.
E-mail addresses: m.mirramezani@me.iut.ac.ir (M. Mirramezani), hrmirdamadi@
cc.iut.ac.ir (H.R. Mirdamadi), ghayour@cc.iut.ac.ir (M. Ghayour).