A damped sandwich beam model based on symmetric-deviatoric couple stress theory

被引：24

作者：

Dehrouyeh-Semnani, Amir Mehdi ^{[1
]}

Dehrouyeh, Mohammad ^{[2
]}

Torabi-Kafshgari, Mostafa ^{[3
]}

Nikkhah-Bahrami, Mansour ^{[1
]}

机构：

[1] Univ Tehran, Coll Engn, Sch Mech Engn, Tehran, Iran

[2] Babol Univ Technol, Dept Civil Engn, Babol Sar, Iran

[3] Islamic Azad Univ, Parand Branch, Dept Mech Engn, Tehran, Iran

来源：

INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE | 2015年 / 92卷

关键词：

Sandwich microbeam; Viscoelastic core; Resonant frequency; Loss factor; Size dependency; Modified couple stress theory; FREE-VIBRATION ANALYSIS; NONLINEAR VIBRATIONS; VISCOELASTIC CORES; FORCED VIBRATION; DYNAMIC-ANALYSIS; COMPOSITE BEAMS; 3-LAYER BEAMS; FREQUENCY; BERNOULLI; ELEMENT;

D O I：

10.1016/j.ijengsci.2015.03.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A size-dependent damped sandwich beam model is developed within the framework of symmetric-deviatoric couple stress theory (the modified version of couple stress theory proposed by Yang et al.) which contains only one material length scale parameter to interpret size effect in microstructures. The damped sandwich microbeam is composed of a viscoelastic core embedded between two elastic faces. Hamilton's principle in conjunction with symmetric-deviatoric couple stress theory is applied to obtain the size-dependent governing equations, boundary and initial conditions of the microbeam. Based on the new model, the influence of size-dependency due to the core and face layers on vibration damping characteristics of the microbeam is investigated. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：83 / 94

页数：12