Effect of Porosity on free and forced vibration characteristics of the GPL reinforcement composite nanostructures

被引：193

作者：

Pourjabari, Amin ^{[1
]}

Hajilak, Zanyar Esmailpoor ^{[2
]}

Mohammadi, Alireza ^{[1
]}

Habibi, Mostafa ^{[3
]}

Safarpour, Hamed ^{[4
]}

机构：

[1] Islamic Azad Univ, South Tehran Branch, Dept Mech, Fac Engn, Tehran, Iran

[2] KN Toosi Univ Technol, Dept Mech Engn, Tehran, Iran

[3] Sharif Univ Technol, Sch Mech Engn, Ctr Excellence Design Robot & Automat, Tehran, Iran

[4] Imam Khomeini Int Univ, Dept Mech, Fac Engn, Qazvin, Iran

来源：

COMPUTERS & MATHEMATICS WITH APPLICATIONS | 2019年 / 77卷 / 10期

关键词：

Porosity; Vibrational characteristics; Dynamic load; Graphene nanoplatelet; MSGT; Thermal environment; GRADED CYLINDRICAL-SHELLS; STRAIN GRADIENT; CARBON NANOTUBES; MECHANICAL-PROPERTIES; NANO-BEAMS; THIN SHELL; MODEL; BEHAVIOR; FOUNDATION; RESONANCE;

D O I：

10.1016/j.camwa.2018.12.041

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

This article investigates the influence of porosity on free and forced vibration characteristics of a nanoshell reinforced by graphene platelets (GPL). The material properties of piecewise graphene-reinforced composites (GPLRCs) are assumed to be graded in the thickness direction of a cylindrical nanoshell and estimated using a nanomechanical model. In addition, because of imperfection of the current structure, three kinds of porosity distributions are considered. The nanostructure is modeled using modified strain gradient theory (MSGT) which is a size-dependent theory with three length scale parameters. The novelty of the current study is to consider the effects of porosity, GPLRC and MSGT on dynamic and static behaviors of the nanostructure. Considering three length scale parameters (l(0) = 5h, l(1) = 3h, l(2) = 5h) in MSGT leads to a better agreement with MD simulation in comparison by other theories. Finally, effects of different factors on static and dynamic behaviors of the porous nanostructure are examined in detail. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：2608 / 2626

页数：19

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