A model of composite laminated Reddy beam based on a modified couple-stress theory

被引：90
|
作者：
Chen, Wanji [1 ]
Chen Weiwei [1 ]
Sze, K. Y. [2 ]
机构：
[1] Shenyang Aerosp Univ, Key Lab Liaoning Prov Composite Struct Anal Aeroc, Shenyang 110136, LN, Peoples R China
[2] Univ Hong Kong, Dept Mech Engn, Pokfulam, Hong Kong, Peoples R China
来源：
COMPOSITE STRUCTURES | 2012年 / 94卷 / 08期
关键词：
Composite laminated beam; Reddy beam; Timoshenko beam; Modified couple-stress theory; Scale effect; STRAIN GRADIENT ELASTICITY; PLATES;
D O I：
10.1016/j.compstruct.2012.02.020
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
In this paper, a new anisotropic constitutive relation based on a modified couple-stress theory is defined for composite laminated Reddy beam. The theory contains only one material length-scale parameter in each ply of the composite laminated beam. The example of a cross-ply simply supported beam subjected to transverse load q(0)sin(pi x/L) is presented. Numerical results show that the proposed beam model can capture the scale effect of the microstructure. The proposed model can be reduced to several models of the modified couple-stress theory by adopting the assumptions in Timoshenko beam, Bernoulli-Euler beam and material isotropy. It can be seen that the deflections and stresses obtained by the proposed beam model are smaller than those based on Timoshenko and Bernoulli-Euler beam assumptions. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2599 / 2609
页数：11
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